Alloys: A mixture of metallic elements or compounds with other metallic or metalloid elements in varying proportions.Exhibits as Topic: Discussions, descriptions or catalogs of public displays or items representative of a given subject.Metals, Light: Metals with low specific gravity, typically smaller than 5, characterized by a single valence (1, 2, or 3), a simple spectrum, strong electromotive force (positive), and colorless compounds. (From Grant & Hackh's Chemical Dictionary, 5th ed)Gold Alloys: Alloys that contain a high percentage of gold. They are used in restorative or prosthetic dentistry.Chromium Alloys: Specific alloys not less than 85% chromium and nickel or cobalt, with traces of either nickel or cobalt, molybdenum, and other substances. They are used in partial dentures, orthopedic implants, etc.Magnesium Deficiency: A nutritional condition produced by a deficiency of magnesium in the diet, characterized by anorexia, nausea, vomiting, lethargy, and weakness. Symptoms are paresthesias, muscle cramps, irritability, decreased attention span, and mental confusion, possibly requiring months to appear. Deficiency of body magnesium can exist even when serum values are normal. In addition, magnesium deficiency may be organ-selective, since certain tissues become deficient before others. (Harrison's Principles of Internal Medicine, 12th ed, p1936)Aluminum: A metallic element that has the atomic number 13, atomic symbol Al, and atomic weight 26.98.Metallurgy: The science, art, or technology dealing with processes involved in the separation of metals from their ores, the technique of making or compounding the alloys, the techniques of working or heat-treating metals, and the mining of metals. It includes industrial metallurgy as well as metallurgical techniques employed in the preparation and working of metals used in dentistry, with special reference to orthodontic and prosthodontic appliances. (From Jablonski, Dictionary of Dentistry, 1992, p494)Copper: A heavy metal trace element with the atomic symbol Cu, atomic number 29, and atomic weight 63.55.Dental Casting Technique: The process of producing a form or impression made of metal or plaster using a mold.Patents as Topic: Exclusive legal rights or privileges applied to inventions, plants, etc.Science: The study of natural phenomena by observation, measurement, and experimentation.South Africa: A republic in southern Africa, the southernmost part of Africa. It has three capitals: Pretoria (administrative), Cape Town (legislative), and Bloemfontein (judicial). Officially the Republic of South Africa since 1960, it was called the Union of South Africa 1910-1960.Research Personnel: Those individuals engaged in research.Social Sciences: Disciplines concerned with the interrelationships of individuals in a social environment including social organizations and institutions. Includes Sociology and Anthropology.Biological Science Disciplines: All of the divisions of the natural sciences dealing with the various aspects of the phenomena of life and vital processes. The concept includes anatomy and physiology, biochemistry and biophysics, and the biology of animals, plants, and microorganisms. It should be differentiated from BIOLOGY, one of its subdivisions, concerned specifically with the origin and life processes of living organisms.History, 20th Century: Time period from 1901 through 2000 of the common era.Metal Ceramic Alloys: The fusion of ceramics (porcelain) to an alloy of two or more metals for use in restorative and prosthodontic dentistry. Examples of metal alloys employed include cobalt-chromium, gold-palladium, gold-platinum-palladium, and nickel-based alloys.Palladium: A chemical element having an atomic weight of 106.4, atomic number of 46, and the symbol Pd. It is a white, ductile metal resembling platinum, and following it in abundance and importance of applications. It is used in dentistry in the form of gold, silver, and copper alloys.Mouth Rehabilitation: Process of restoring damaged or decayed teeth using various restorative and non-cosmetic materials so that oral health is improved.Dental Porcelain: A type of porcelain used in dental restorations, either jacket crowns or inlays, artificial teeth, or metal-ceramic crowns. It is essentially a mixture of particles of feldspar and quartz, the feldspar melting first and providing a glass matrix for the quartz. Dental porcelain is produced by mixing ceramic powder (a mixture of quartz, kaolin, pigments, opacifiers, a suitable flux, and other substances) with distilled water. (From Jablonski's Dictionary of Dentistry, 1992)Materials Testing: The testing of materials and devices, especially those used for PROSTHESES AND IMPLANTS; SUTURES; TISSUE ADHESIVES; etc., for hardness, strength, durability, safety, efficacy, and biocompatibility.Titanium: A dark-gray, metallic element of widespread distribution but occurring in small amounts; atomic number, 22; atomic weight, 47.90; symbol, Ti; specific gravity, 4.5; used for fixation of fractures. (Dorland, 28th ed)

Transcatheter closure of secundum atrial septal defects with the new self-centering Amplatzer Septal Occluder. (1/452)

AIMS: The study was set up to find out whether a new self-centering prosthesis for transcatheter closure of secundum atrial septal defects could overcome the disadvantages of previously described devices. METHODS AND RESULTS: Fifty-two consecutive patients with a significant atrial septal defect were considered for transcatheter closure with the Amplatzer Septal Occluder. The device, made of a Nitinol and polyester fabric mesh, provides a different approach to defect occlusion by stenting the atrial septal defect up to a stretched diameter of 26 mm. Three infants whose large defects were demonstrated on a transthoracic echocardiogram were excluded from transcatheter treatment. On transoesophageal echocardiography, 49 defects ranged from 6-26 mm, in one adult the defect measured 28 mm and this patient was excluded from attempted transcatheter closure. At cardiac catheterization in five further patients, devices were not implanted, in two because the stretched diameter exceeded 26 mm and in three the device was withdrawn because it was unstable or compromised the mitral valve. Thus, device closure was performed in 43 patients. At follow-up after 3 months the complete closure rate was 97%. CONCLUSION: The self-centering Amplatzer Septal Occluder is very efficient and user-friendly and offers interventional closure in 83% of an unselected group of patients presented with an atrial septal defect.  (+info)

New device for closure of muscular ventricular septal defects in a canine model. (2/452)

BACKGROUND: Repair of muscular ventricular septal defects (MVSDs) has always been challenging to the surgeon. Long-term morbidity and mortality are significantly increased if the defects are closed via left ventriculotomy or if they are associated with other complex congenital anomalies. The purpose of this study was to close MVSDs with the Amplatz ventricular septal defect device. This device is constructed from 0.004-in nitinol wire mesh filled with polyester fibers. It is retrievable, repositionable, self-centering, and of low profile. METHODS AND RESULTS: MVSDs were created with the help of a sharp punch in 10 dogs. The location of the defects was anterior muscular (n=3), midmuscular (n=3), apical (n=3), and inlet muscular (n=1). The diameter of the defects ranged from 6 to 14 mm. All defects were closed in the catheterization laboratory. The device was placed with the help of transesophageal echocardiography and fluoroscopy. A 7F sheath was used to deploy the device from the right ventricular side in 8 and the left ventricular side in 2 dogs. Placement was successful in all animals. The complete closure rate was 30% (3/10) immediately after placement and 100% at 1-week follow-up. Pathological examination of the heart revealed complete endothelialization of the device in dogs killed after 3 months. CONCLUSIONS: The Amplatz ventricular septal defect device appears highly efficacious in closing MVSDs. The advantages include a small delivery sheath, complete retrievability before release, and the fact that it is self-centering and self-expanding, thereby making it an attractive option in smaller children.  (+info)

Origin of graphitic carbon and pentlandite in matrix olivines in the Allende meteorite. (3/452)

Matrix olivines in the Allende carbonaceous chondrite are believed to have formed by condensation processes in the primitive solar nebula. However, transmission electron microscope observations of numerous matrix olivines show that they contain abundant, previously unrecognized, nanometer-sized inclusions of pentlandite and poorly graphitized carbon. Neither of these phases would have been stable at the high-temperature conditions required to condense iron-rich olivine in the solar nebula. The presence of these inclusions is consistent with formation of the olivines by parent body processes that involved overgrowth of fine-grained organic materials and sulfides in the precursor matrix materials.  (+info)

Further experience with transcatheter closure of the patent ductus arteriosus using the Amplatzer duct occluder. (4/452)

OBJECTIVE: The aim of this study was to report further experience with transcatheter closure of the patent ductus arteriosus (PDA) using the Amplatzer duct occluder (ADO). BACKGROUND: The design of previously used devices is not ideal for this purpose, and their use has been associated with several drawbacks, especially in large PDAs. METHODS: Forty-three patients, aged 0.3 to 33 years (mean 6.4+/-6.7 years), with a moderate to large, type A to E PDA, underwent attempted transcatheter closure using the ADO. The device is a plug-shaped repositionable occluder made of 0.004-in. nitinol wire mesh. It is delivered through a 5F to 6F long sheath. The mean PDA diameter (at the pulmonary end) was 3.9+/-1.2 mm (range 2.2 to 8 mm). All patients had color flow echocardiographic follow-up (6 to 24 months) at 24 h, 1 and 3 months after closure, and at 6-month intervals thereafter. RESULTS: The mean ADO diameter was 6.1+/-1.4 mm (range 4 to 10 mm). Complete angiographic closure was seen in 40 of 43 patients (93%; 95% confidence interval [CI] 85.4% to 100%). The remaining three patients had a trivial angiographic shunt through the ADO. At 24 h, color flow mapping revealed no shunt in all patients. A 9F long sheath was required for repositioning of a misplaced 8-mm device into the pulmonary artery. The mean fluoroscopy time was 7.9+/-1.6 min (range 4.6 to 12 min). There were no complications. No obstruction of the descending aorta or the pulmonary artery branches was noted on Doppler follow-up studies. Neither thromboembolization nor hemolysis or device failure was encountered. CONCLUSIONS: Transcatheter closure using the ADO is an effective and safe therapy for the majority of patients with patency of the arterial duct. Further studies are required to establish long-term results in a larger patient population.  (+info)

Successful percutaneous endovascular treatment of a ruptured popliteal artery aneurysm. (5/452)

A rupture of the popliteal artery is a rare but dangerous complication of aneurysmal disease. It accounts for 4% of all popliteal artery aneurysms encountered and threatens the loss of the extremity and, infrequently, is also life-threatening.(1) when this clinical entity is confronted, a prompt operative intervention is indispensable for increasing the chances of limb salvage. We report the first, to our knowledge, successful endovascular treatment of a ruptured popliteal artery aneurysm with a new polytetrafluoroethylene stent-graft in a patient who was unfit for a conventional surgical approach because of his severe pulmonary disease.  (+info)

Hard metal alveolitis accompanied by rheumatoid arthritis. (6/452)

Hard metal lung diseases (HML) are rare, and complex to diagnose. We describe the case of a patient with allergic alveolitis accompanied by rheumatoid arthritis. A sharpener of hard metal by trade, our patient was a 45-year-old, nonsmoking Caucasian female who experienced symptoms of cough and phlegm, and dyspnea on exertion. Preliminary lung findings were inspiratory rales in both basal areas, decreased diffusion capacity and a radiological picture resembling sarcoidosis. A high-resolution computed tomography scan indicated patchy alveolitis as well. An open lung biopsy revealed non-necrotizing granulomas consisting of epitheloid cells and surrounded by lymphocytes, plasma cells and a few eosinophils. These cells also occupied the thickened alveolar interstitium. Macrophages in the alveolar spaces, some of them multinuclear, contained dust particles. Hard metal alveolitis is clinically well known and, in this patient, has been described histologically. After the patient had quit working with hard metal and following corticosteroid therapy, pulmonary symptoms and signs were relieved. During this recovery period, however, she contracted rheumatoid arthritis.  (+info)

Endovascular stenting for carotid artery stenosis: preliminary experience using the shape-memory- alloy-recoverable-technology (SMART) stent. (7/452)

We describe our initial clinical experience using the newly available self-expanding, Nitinol, shape-memory-, alloy-recoverable-technology (SMART) stent in treating carotid artery occlusive disease. Five stents were used in four carotid arteries in four consecutive patients with carotid stenosis of at least 70%. Technical success (<20% residual stenosis) was achieved in all cases. No procedural complications specifically related to use of the SMART stent were encountered. All patients remained symptom-free, with no evidence of transient ischemic attacks or new strokes during an average follow-up period of 6 months. Excellent performance of the SMART stent for the endovascular treatment of carotid artery stenosis has been shown based on our early experience. Validation with greater numbers and longer-term follow-up is required. The specific technical characteristics, potential advantages, and disadvantages of this stent are discussed and compared with other currently used carotid artery stents.  (+info)

Nitinol - its use in vascular surgery and other applications. (8/452)

OBJECTIVES: to describe the physical properties of shape-memory alloys and the surgical, scientific and commercial applications of nitinol, in particular. DESIGN AND METHODS: a Medline, Internet and library search with contributions from commerce to describe the alloy's structure, behaviour and biocompatibility, and design for devices constructed from nitinol. RESULTS: nitinol has the properties of thermal shape memory and superelasticity that make it ideal for many vascular and general surgical prostheses and disposables, and for various commercial applications. CONCLUSIONS: further research into shape-memory alloys from scientific and commercial groups should widen their use in vascular and endovascular surgery.  (+info)

*Antimicrobial properties of copper

Antimicrobial copper-alloy touch surfaces Copper alloys in aquaculture Medical uses of silver Oligodynamic effect Dollwet, H. H ... For the most part, the bacterial kill rate of copper alloys increased with increasing copper content of the alloy. This is ... H7 bactericidal efficacies on 25 different copper alloys to identify those alloys that provide the best combination of ... The copper alloys significantly reduced the viability of both C. difficile spores and vegetative cells. On C75200, near total ...

*Alloy wheel

... s are wheels that are made from an alloy of aluminium or magnesium. Alloys are mixtures of a metal and other ... "alloy wheel" is usually reserved for wheels made from nonferrous alloys. The earliest light-alloy wheels were made of magnesium ... Alloy wheels are also purchased for cosmetic purposes although the cheaper alloys used are usually not corrosion-resistant. ... alloy wheels being options. The high cost of alloy wheels makes them attractive to thieves; to counter this, automakers and ...

*Copper toxicity

Copper and copper alloys such as brass have been found to be toxic to bacteria via the oligodynamic effect. The exact mechanism ... Note: The most important nonsparking copper alloy is beryllium copper, and can lead to beryllium poisoning. With an LD50 of 30 ... OSHA has set safety standards for grinding and sharpening copper and copper alloy tools, which are often used in nonsparking ...

*Hunter process

Heinz Sibum, Volker Günther, Oskar Roidl, Fathi Habashi, Hans Uwe Wolf, "Titanium, Titanium Alloys, and Titanium Compounds" in ...

*Casting defect

In the specific case of aluminium alloys, it is important to control the concentration of inclusions by measuring them in the ... ISBN 978-81-203-2779-5. Avedesian, M. M.; Baker, Hugh; ASM International (1999). Magnesium and magnesium alloys (2nd ed.). ASM ... Hydrogen gas porosity Inclusions in aluminium alloys Non-metallic inclusions for inclusions in steel Porosity sealing Rao 1999 ... ISBN 978-0-87170-564-8. Author, Author (2005). Casting Technology and Cast Alloys. Prentice-Hall. p. 242. ...

*Tube Alloys

Wallace Akers, who oversaw the project, chose the deliberately misleading name "Tube Alloys". His Tube Alloys Directorate was ... The Tube Alloys programme in Britain and Canada was the first nuclear weapons project. Due to the high costs, and the fact that ... Tube Alloys therefore fell behind in the race with the Manhattan Project. On 30 July 1942, Anderson advised Churchill that: "We ... Tube Alloys was subsumed into the Manhattan Project. In a section of the Quebec Agreement formally entitled "Articles of ...

*Cymbal alloys

Nickel silver as used in cymbal making is an alloy of copper and nickel, and an alloy with about 12% nickel is used for some ... Cymbal bronzes containing 8% tin are most normally called B8 alloy. Paiste refer to their 8% tin bronze as 2002 alloy. From the ... Bell bronze is a two-phase alloy, meaning some of the tin is not dissolved in the copper grains but exists between them. This ... It is a single-phase alloy and can be cold rolled into sheets, unlike bell bronze. It is readily available as commercial sheet ...

*AJ alloys

... (AJ52 and AJ62) are die castable alloys of magnesium that have good creep resistance at high temperature. They ... Alloy Mg Al% Sr% Mn% AJ62 Balance 6 2 0.34 AJ52 Balance 5 2 0.4 AJ52 has higher creep resistance, and AJ62 has better ... Magnesium: Proceedings of the 7th International Conference on Magnesium Alloys and Their Applications. Wiley-VCH. p. 252. ISBN ...

*Rolled Alloys

... was founded in 1953 on the introduction of wrought RA330 alloy as a replacement for cast HT alloy. Prior to 1953 ... In 2012 Rolled Alloys expanded to Richburg, South Carolina with a new bar facility. Rolled Alloys also built a new facility for ... Rolled Alloys is a private company headquartered in Temperance, Michigan, in the United States. Rolled Alloys is a supplier in ... Rolled Alloys Canada also deals in the Pulp / Paper and Mining markets. Rolled Alloys has expanded through acquisitions of ...

*Maithan Alloys

"Maithan Alloys - BSE India". BSE India. "Maithan Alloys recommends dividend". MoneyControl.com. "Maithan Alloys hits 20% upper ... "Maithan Alloys Limited". Business Line - The Hindu. "Company Overview of Maithan Alloys Limited". Bloomberg. "Maithan Alloys". ... "Maithan Alloys FY17 profit more than doubles to Rs 191 crore". Economic Times. Patherya, Mudar. "Maithan Alloys stands out in ... Maithan Alloys Limited is a publicly listed company at NSE which manufactures, sells manganese and ferro-alloys within India ...

*Wabash Alloys Locomotive

Little is known about its early life, but from around 1970, it worked at Wabash Alloys, a producer of aluminum alloys, at ... "Wabash Alloys". Arkansas Trains (TrainWeb). Retrieved 8 February 2010. "Wabash Alloys Locomotive, Pine Bluff, Jefferson County ... The Wabash Alloys Locomotive is a GE 25-ton diesel-electric locomotive built in 1940-43. ...

*Ferro Alloys Corporation

The Ferro Alloys Corporation Limited (FACOR) was floated in 1955 by the house of Sarafs and Mors to become the first major ... The Ferro Alloys produced are High Carbon Ferro Chrome, Low Carbon Ferro Chrome, Silico Chrome, Silico Manganese and Magnesium ... FACOR.::Ferro Alloys Corporation Ltd". Facorgroup.in. 2009-03-19. Archived from the original on 12 November 2010. Retrieved ... "FERROALL History , Ferro Alloys Corporation Ltd Company History & Profile". Economictimes.indiatimes.com. Retrieved 2010-12-08 ...

*Tantalum-tungsten alloys

This alloy can also be used in some different applications like piping in nuclear plants. The alloys of tantalum-tungsten have ... Ta - 10% W) → also called 'tantaloy 60 metall' uses 9 to 11% of tungsten, this alloy is less ductile than the other alloys, ... Tungsten the difference from this alloy to the others is that this alloy represents a high resilience modulus while maintaining ... The alloy also has a high melting point and can reach high elastic modulus and high tensile strength. The equilibrium phase ...

*Complex metallic alloys

"Structurally complex alloy phases". Journal of Non-Crystalline Solids. Elsevier B.V. 334-335: 143-150. Bibcode:2004JNCS..334.. ... Complex metallic alloys (CMAs) of complex intermetallics (CIMs) are intermetallic compounds characterized by the following ... 2011). Complex Metallic Alloys: Fundamentals and Applications. Wiley-VCH. doi:10.1002/9783527632718. ISBN 978-3-527-32523-8. EC ... From this emerged the European Integrated Center for the Development of New Metallic Alloys and Compounds C-MAC [2], which ...

*List of alloys

List of named alloys List of brazing alloys Complex metallic alloys Heusler alloy, a range of ferromagnetic alloys (66% copper ... Some of the main alloying elements are optionally listed after the alloy names. Aluminium also forms complex metallic alloys, ... An alloy which is 14 parts gold to 10 parts alloy is 14 karat gold, 18 parts gold to 6 parts alloy is 18 karat, etc. This is ... This is a list of named alloys grouped alphabetically by base metal. Within these headings, the alloys are also grouped ...

*High entropy alloys

Cantor, not knowing of Yeh's work, did not describe his alloy as a "high-entropy" alloy, but the base alloy he developed, ... Some authors have described 4-component alloys as high-entropy alloys while others have suggested that alloys meeting the other ... "Alloying behavior and novel properties of CoCrFeNiMn high-entropy alloy fabricated by mechanical alloying and spark plasma ... "New 'high-entropy' alloy is as light as aluminum, as strong as titanium alloys". Phys.org. Retrieved 29 May 2015. Zou, Yu; ...

*List of brazing alloys

Phosphorus Alloy Silvaloy 2M Brazing Alloy Silvalite Brazing Alloy Silvabraze 33830 Brazing Alloy Silvaloy 0 Brazing Alloy " ... Alloy Silvaloy A25T Brazing Alloy Silvaloy 35 Brazing Alloy EASY FLO 3 Carbide Brazing Alloy F Bronze High Temperature Alloy ... Silvaloy 18M Brazing Alloy Matti-sil 18Si Cadmium Free Brazing Alloy SIL-FOS 18 Silver/ Copper/ Phosphorus Alloy Silvaloy 6 ... Silvacap 35490 Brazing Alloy FOS FLO 670 Copper Phosphorus Tin Braze Filler Metal "Copper Phosphorus Alloys , BCuP Alloy , ...

*List of copper alloys

Copper alloys are metal alloys that have copper as their principal component. They have high resistance against corrosion. The ... A bronze is an alloy of copper and other metals, most often tin, but also aluminium and silicon. Aluminium bronzes are alloys ... The following table outlines the chemical composition of various grades of copper alloys. A brass is an alloy of copper with ... and special alloys. The following table lists the principal alloying element for four of the more common types used in modern ...

*Magna Alloys v Ellis

The Magna Alloys case changed the law and has settled the divisions of opinion on the issue of the retraint of trade. by Regina ... Magna Alloys & Research (S.A.) (Pty) Ltd. v Ellis is an important case in South African law, particularly contract. It ... the leading case on restraint of trade is Magna Alloys and Research ( SA) (PTY) Ltd Vs Ellis 1984 (4) 874 ( A). The Law on ... Prior to the Magna Alloys case, South African courts have accepted that an agreement in restraint of trade is contrary to ...

*Alloy

An alloy with four constituents is a quaternary alloy, while a five-part alloy is termed a quinary alloy. Because the ... Some alloys are made by melting and mixing two or more metals. Bronze, an alloy of copper and tin, was the first alloy ... Precipitation hardening alloys, such as certain alloys of aluminium, titanium, and copper, are heat-treatable alloys that ... most heat-treatable alloys are precipitation hardening alloys, that depend on the diffusion of alloying elements to achieve ...

*Magnetic alloy

Such an alloy must contain but is not limited to one or more of these metals. Magnetic alloys have become common, especially in ... A magnetic alloy is a combination of various metals from the periodic table that contains at least one of the three main ... Kondo, Jun (July 1964). "Resistance Minimum in Dilute Magnetic Alloys" (PDF). Progress of Theoretical Physics. 32 (01): 37-49. ... which allows items made out of these alloys to attract to magnets. "Cobalt Facts" (PDF). Cobalt Development Institute. 2006. pp ...

*Elektron (alloy)

List of alloys Magnesium Elektron Woldman, Norman E. (2000). John P. Frick, ed. Woldman's Engineering Alloys. Materials data ... Varying amounts of alloying elements (up to 9.5%) added to the magnesium result in changes to mechanical properties such as ... In 1924 magnesium alloys (AZ; 2,5-3,0% Al; 3,0-4,0% Zn) were used in automobile pistons diecast by Elektronmetall Bad Cannstatt ... There are about 100 alloys in the Elektron range, containing from 0% to 9.5% of some of the following elements in varying ...

*Aluminium alloy

5052 aluminium alloy 5059 aluminium alloy 5083 aluminium alloy 5086 aluminium alloy 6061 aluminium alloy 6063 aluminium alloy ... RSP alloys datasheet 7055 ALLOY-T7751 PLATE AND-T77511 EXTRUSIONS Aluminum alloy 7065 Aluminum alloy 7085 High strength, high ... 6061 alloy is one of the most commonly used general-purpose aluminium alloys. 7000 series are alloyed with zinc, and can be ... Y alloy, Hiduminium, R.R. alloys: pre-war nickel-aluminium alloys, used in aerospace and engine pistons, for their ability to ...

*Zirconium alloy

Newer alloys are Ni-free, including Zircaloy-4, ZIRLO and M5. Zirconium alloys readily react with oxygen, forming a nanometer- ... The composition and the main applications of common reactor-grade alloys are summarized below. These alloys contain less than ... Nuclear-grade zirconium alloys contain more than 95% Zr, and therefore most of their properties are similar to those of pure ... Zirconium alloys are solid solutions of zirconium or other metals, a common subgroup having the trade mark Zircaloy. Zirconium ...

*Karen Alloy

Alloy's third child, Lulu Augustine Alloy, was born at 11:22 p.m. CDT, was 22" and 8 lbs, 12 oz. In 2009, the National Academy ... Alloy was the first person to win an Emmy for a YouTube video. She accepted the award from the Upper Midwest Chapter of the ... Karen Schindler Alloy (born August 3, 1977) is an American comedian and Regional Emmy Award-winning entertainer, best known for ... On July 16, 2009, Alloy went into labor and gave her fans live updates during her delivery. It was declared blogTV's very first ...
A method of treating a shape memory alloy to improve its various characteristics and to cause it to exhibit a two-way shape memory effect. A raw shape memory alloy having a substantially uniformly fine-grained crystal structure is prepared and then its crystal orientations are arranged substantially in a direction suitable for an expected operational direction, such as tensile or twisting direction or the like, in which the shape memory alloy is expected to move when used in an actuator after the completion of the treatment.
The application of Nitinol shape memory alloys (SMA) in steel connections is evaluated using connections incorporating SMA tendons. Shape memory alloys are a class of alloys that exhibit thermo-mechanical characteristics that are ideally suited for seismic applications. They have the ability to dissipate significant energy with little permanent deformation, and possess highly reliable energy dissipation based on a repeatable solid state phase transformation. To assess the validity of using SMA in real structures, two full-scale connections are tested. The tests are conducted on exterior joint specimens and tested according to the SAC testing protocol. The beams are W24 x 94 and the columns W14 x 159, all of A572 Grade 50 steel. Companion regular steel connections are tested for comparison. The connections are of a T-stub type, with four 11/2 inch diameter SMA rods providing the tensile resistance to the column. The specimens are re-tested several times to determine the ability of the SMA rods to ...
Define Magnesium alloy. Magnesium alloy synonyms, Magnesium alloy pronunciation, Magnesium alloy translation, English dictionary definition of Magnesium alloy. n. Symbol Mg A light, silvery-white, moderately hard metallic element that in ribbon or powder form burns with a brilliant white flame. Obtained chiefly...
Background: Restenosis following nitinol stent implantation in the superficial femoral artery (SFA) predominantly occurs within a year, but continues to occur with lower rates afterwards. However, factors associated with restenosis remain unclear. We sought to investigate the factors associated with restenosis within a year and beyond in this study.. Methods: We studied 431 limbs in consecutive 309 patients with peripheral artery disease (74±9 years, male 72%, claudicator 70%) who underwent successful endovascular therapy (EVT) for de novo SFA lesions. Nitinol stents (Luminexx in 93 limbs; Smart in 338 limbs) were provisionally deployed from April 2004 to December 2008. We classified the limbs as: early restenosis group = restenosis occurred within a year, 68 limbs; late restensosis group = restensosis occurred beyond a year, 24limbs; no-restenosis group, 339 limbs. Restenosis was detected by duplex ultrasound and stent fracture was identified by X-ray. A multiple logistic analysis was ...
Shape memory alloy (SMA) microactuators are under development for use in soft bodied robotics. These actuators take advantage of the shape memory effect of nickel-titanium alloys (nitinol) to deliver high force and large strain in a solid-state, thin film actuator. The actuators will be used for generating motion in an all-soft-material robotic platform that attempts to mimic some of the features of the tobacco hornworm caterpillar, Manduca Sexta. The devices described in this work are unique due to their thin patch-like structure, which will allow them to be laminated onto, or embedded into, the soft wall of the robot. The actuator patches consist of a nitinol microwire on a flexible polyimide base. The overall dimensions of the patches vary from 7.75 x 3.5 mm to 22 x 10 mm. The wires are 0.1 -0.8 mm wide. The polyimide is photodefined in a mesh structure so that the sheet is much more compliant in tension and compression than a flat sheet. The nitinol microwire meanders across the polyimide structure
TY - JOUR. T1 - Effect of travel speed on quality and welding efficiency of friction stir welded AZ31B magnesium alloy. AU - Baghdadi, Amir Hossein. AU - Selamat, Nor Fazilah Mohamad. AU - Sajuri, Zainuddin. AU - Kokabi, Amir Hossein. PY - 2018/1/1. Y1 - 2018/1/1. N2 - Weight reduction is one of the most concerning issues of automotive and aircraft industries in reducing fuel consumption. Magnesium (Mg) alloys are the lightest alloys which can be used in the structure due to low density and high strength to weight ratio. Developing a reliable joining process of magnesium alloys is required due to limited ductility and low workability at room temperature. Friction stir welding (FSW) is a solid-state welding process that can be performed to produce sound joints in magnesium alloys. Researchers have performed investigations on the effect of rotation and travel speeds in FSW of AZ31B magnesium alloy. However, there is lack of study on the FSW parameters, i.e. travel speed below 50 mm/min and ...
A shape memory alloy consists of a three element alloy of nickel-titanium-copper which is formed as being subjected to a cold working and to a heat treatment at a temperature below recrystallization point of the alloy for storing the shape, the alloy being thereby improved in operation stability and reliability even after repetitive operation and made wider in environmental temperature range for use therein of the alloy.
An implantable probe having an elongated sheath with provision for remotely positioning a device disposed within the elongated sheath. In one embodiment, the device is a circuit board, and a shape memory alloy (SMA) such as Nitinol is used to fabricate one or more actuators that are coupled to the circuit board. The shape memory effect exhibited by the SMA actuator is thermally activated. Electrical current is selectively applied to the actuator to resistively heat the SMA to a temperature sufficient to change its shape. When the shape of the SMA changes, the actuator moves the circuit board or other device longitudinally within the elongated sheath so that the light emitted is directed to a different portion of a treatment site. In another embodiment, the circuit board is rotated about its longitudinal axis within the sheath. In still another embodiment, the actuator moves a piston so as to pump a fluid through a pair of lumens disposed within the sheath to dissipate heat produced by the light emitting
We describe herein biocompatible single crystal Cu-based shape memory alloys (SMAs). In particular, we show biocompatibility based on MEM elution cell cytotoxicity, ISO intramuscular implant, and hemo-compatibility tests producing negative cytotoxic results. This biocompatibility may be attributed to the formation of a durable oxide surface layer analogous to the titanium oxide layer that inhibits body fluid reaction to titanium nickel alloys, and/or the non-existence of crystal domain boundaries may inhibit corrosive chemical attack. Methods for controlling the formation of the protective aluminum oxide layer are also described, as are devices including such biocompatible single crystal copper-based SMAs.
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A polycrystalline Ni 41Co 9Mn 40Sn 10 (at. %) magnetic shape memory alloy was prepared by arc melting and characterized mainly by magnetic measurements, in-situ high-energy X-ray diffraction (HEXRD), and mechanical testing. A large magnetoresistance of 53.8% (under 5 T) and a large magnetic entropy change of 31.9 J/(kg K) (under 5 T) were simultaneously achieved. Both of these values are among the highest values reported so far in Ni-Mn-Sn-based Heusler alloys. The large magnetic entropy change, closely related to the structural entropy change, is attributed to the large unit cell volume change across martensitic transformation as revealed by our in-situ HEXRD experiment. Furthermore, good compressive properties were also obtained. Lastly, the combination of large magnetoresistance, large magnetic entropy change, and good compressive properties, as well as low cost makes this alloy a promising candidate for multifunctional applications. ...
In this study some new concepts regarding certain aspects related to shape memory polymers are presented. A blend of polylactic acid (PLA) (80%) and polybutylene succinate (PBS) (20%) was prepared first by extrusion, then by injection molding to obtain the samples. Tensile, stress-relaxation and recovery tests were performed on these samples at 70 °C. The results indicated that the blend can only regain 24% of its initial shape. It was shown that, this partial shape memory effect could be improved by successive cycles of shape memory tests. After a fourth cycle, the blend is able to regain 82% of its shape. These original results indicated that a polymer without (or with partial) shape memory effect may be transformed into a shape memory polymer without any chemical modification. In this work, we have also shown the relationship between shape memory and property memory effect. Mono and multi-frequency DMA (dynamic mechanical analyzer) tests on virgin and 100% recovered samples of polyurethane (PU)
In spite of some good successes and excellent researches of Nickel-titanium shape memory alloy (NiTi-SMA) in reconstructive surgery, there are still serious limitations to the clinical applications of NiTi alloy today. The potential leakage of elements and ions could be toxic to cells, tissues and organs. This review discussed the properties, clinical applications, corrosion performance, biocompatibility, the possible preventive measures to improve corrosion resistance by surface/structure modifications and the long-term challenges of using SMAs.
The use of magnesium alloys in engineering applications is becoming increasingly important as a relatively low density allows savings in energy consumption and therefore reduction in air pollution.. An associated reduction in inertia also makes these alloys potential candidates for friction components. Magnesium alloys, however, have low wear resistance and low hardness and sticking or seizure phenomena easily occur with the counter materials such as steel, copper and aluminum alloys. In a paper published under AZojomo*, Katsuyoshi Kondoh, Ritsuko Tsuzuki and Eiji Yuasa, researchers at the Research Center for Advanced Science and Technology, University of Tokyo, investigated the effect that an addition of Mg2Si dispersoids would have on wear resistance and tribological properties of magnesium alloys. For the purposes of this study, the magnesium matrix composite alloys with Mg2Si dispersoids were developed via solid-state processing.. The research found that the strength of the composite ...
With the progress of miniaturization, shape memory alloy (SMA) actuators exhibit high energy density, self-sensing ability and ease of fabrication, which make them well suited for practical applications. This paper presents a self-sensing controlled actuator drive that was designed using antagonistic pairs of SMA wires. Under a certain pre-strain and duty cycle, the stress between two wires becomes constant. Meanwhile, the strain to resistance curve can minimize the hysteresis gap between the heating and the cooling paths. The curves of both wires are then modeled by fitting polynomials such that the measured resistance can be used directly to determine the difference between the testing values and the target strain. The hysteresis model of strains to duty cycle difference has been used as compensation. Accurate control is demonstrated through step response and sinusoidal tracking. The experimental results show that, under a combination control program, the root-mean-square error can be reduced to 1.093
A hybrid super-elastomeric seal and method for making same wherein a super-elastic shape memory alloy spring is embedded in an elastomeric material in order to overcome the tendency of the seal to undergo compression set due to time or harsh environment.
We have studied adiabatic temperature change Î"Tad in a Ni50Mn36Co1Sn13 metamagnetic shape memory alloy. An irreversible character of Î"Tad has been observed in the vicinity of the reverse martensitic transformation. In this region, cyclic application of the magnetic field converts comparatively large inverse magnetocaloric effect (MCE) with Î"Tadmax=-0.8 K to a weaker conventional MCE (Î"Tadmax=0.3 K). The crossover of Î"Tad has been attributed to the irreversible character of the magnetic field-induced transformation and the closeness of the martensitic transformation and Curie temperature of the austenitic phase TCA ...
small study in which 40 patients underwent nitinol stent placement in the SFA and then had a follow-up angiography, stent fracture occurred in 28% (11/40) after a mean follow-up of 13.6 months, more in patients who walked more in the time after the procedure. A retrospective analysis of 239 patients who underwent femoro-popliteal nitinol stent placement for claudication and critical limb ischemia reported a 4 year stent fracture rate of 17% and primary patency rate of 65%, similar to patients in whom there was no fracture. Clinical outcomes were not reported. A retrospective analysis of 742 limbs in 585 consecutive patients who underwent de novo SFA nitinol stent placement reported a primary and secondary patency rate of 67% and 86% at 6 years, respectively. Stent fracture, observed in 14% of limbs, was associated with early restenosis (P=0.0004). The association between stent fracture and clinical outcomes has been described in one small study of 53 patients who were followed for a median of 16 ...
Ni2MnGa based ferromagnetic alloys are ideal candidates for applications such as actuators, magnetic refrigerators or magnetostrictive transducers due to their attractive properties such as magnetic field induced shape memory effect and large magnetocaloric effect. The properties of these alloys (e.g., the martensitic transformation temperature T (M) ) sensitively depend on the composition. Understanding the composition dependence of these properties so as to design the alloy as desired is one of the main research topics in this area. In recent years, we have investigated the composition dependent elastic modulus and phase stability of Ni2MnGa-based alloys by using a first-principles method, in hope of clarifying their connection to the properties of these alloys. In this article, we review the main results of our investigations. We show that the tetragonal shear modulus C is a better predictor of the composition dependent T (M) than the number of valence electrons per atom (e/a) since the ...
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Cardiology Research and Practice is a peer-reviewed, Open Access journal that publishes original research articles, review articles, and clinical studies that focus on the diagnosis and treatment of cardiovascular disease. The journal welcomes submissions related to systemic hypertension, arrhythmia, congestive heart failure, valvular heart disease, vascular disease, congenital heart disease, and cardiomyopathy.
Cardiology Research and Practice is a peer-reviewed, Open Access journal that publishes original research articles, review articles, and clinical studies that focus on the diagnosis and treatment of cardiovascular disease. The journal welcomes submissions related to systemic hypertension, arrhythmia, congestive heart failure, valvular heart disease, vascular disease, congenital heart disease, and cardiomyopathy.
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We report the first-in-human experience with a new self-expanding THV and motorized delivery system. A TAVR with the CENTERA THV and motorized delivery system was performed successfully in 15 patients with good hemodynamic and clinical short- and midterm outcomes.. The CENTERA THV design shares some similarities with current balloon-expandable THVs (SAPIEN and SAPIEN XT, Edwards Lifesciences). All incorporate bovine pericardial tissue leaflets and an internal polyethylene terephthalate paravalvular seal and use relatively "short" stent frames. The salient difference is the self-expanding nitinol frame, with a flared inflow, narrower annular segment, and a larger-diameter outflow. This shape is designed to facilitate self-seating in the aortic annulus. In comparison with most other self-expanding nitinol valves the CENTERA THV does not extend into the ascending aorta for anchoring or self-alignment.. The CENTERA fixation and alignment is dependent on the self-seating stent frame but also on a ...
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0060] If Al or an alloy of Al and any one of Nd, Sc, C, Ni, B, Zr, Lu, Cu and Ag is used for the data wiring (62, 65, 66 and 67), the data wiring (62, 65, 66 and 67) may be formed as multiple layers including different types of layers formed on and/or under Al or the Al alloy. In an exemplary embodiment, the data wiring (62, 65, 66 and 67) is a double layer including any one of Mo(Mo alloy)/Al(Al alloy), Ti(Ti alloy)/Al(Al alloy), Ta(Ta alloy)/Al(Al alloy), Ni(Ni alloy)/Al(Al alloy) and Co(Co alloy)/Al(Al alloy) or a triple layer including any one of Ti(Ti alloy)/Al(Al alloy)/Ti(Ti alloy), Ta(Ta alloy)/Al(Al alloy)/Ta(Ta alloy), Ti(Ti alloy)/Al(Al alloy)/TiN, Ta(Ta alloy)/Al(Al alloy)/TaN, Ni(Ni alloy)/Al(Al alloy)/Ni(Ni alloy), Co(Co alloy)/Al(Al alloy)/Co(Co alloy) and Mo(Mo alloy)/Al(Al alloy)/Mo(Mo alloy). The alloy materials may include at least one element selected from the group consisting of Mo, W, Nb, Zr, V, O, and N ...
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Market analysis of how particular shape memory materials are likely to perform in the marketplace and how SMAs and SMPs are most likely to find their respective niches and price points. Shape memory materials are polymers or alloys that when deformed.
This paper describes the fact that a kind of thermoplastic shape memory polyurethane with self-complementary quadruple hydrogen bonding units in soft segments can present a significant shape memory effect under the usually used thermodynamic programming condition. Compared with the control sample, it was observed that the introduction of self-complementary quadruple hydrogen bonding into soft segments increases the glass transition temperature from 28.3 ° C to 73.3 ° C. Therefore, the temporary deformation can be fixed well after cooling at room temperature; subsequently thermal responsive shape memory recovery can be triggered by heating up to 86 ° C. The immediate shape recovery ratio and shape fixity ratio can be 95.8% and 95.9%. Even after 24 hours relaxation for the stretched films, the corresponding R r and R f can be 94% and 60%. In contrast, the sample without quadruple hydrogen bonding shows that the elasticity and the deformation cannot be fixed after 24 hours relaxation ...
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The increasing use of aluminium alloys in high demand applications has lead to the development of a number of surface treatment technologies designed to improve hardness and wear characteristics. This thesis investigates the combination of a high power laser beam and an electric arc to produce new surfaces on aluminium alloys. Topics covered include: * The physics of the laser-arc-material surface interaction * Surface remelting of aluminium alloys * Surface alloying of aluminium alloys with Si, Fe and Ni * Arc stabilisation by laser irradiation * Optimisation of the laser-arc process parameters * Metallographic examination of the surfaces generated by laser-arc melting and analysis of the solidification rates. It was discovered that the addition of an arc source to the laser-material interaction lead to an improvement of surface properties and production rates.. ...
Self Expanding nitinol Stent indicated for use in the peripheral vasculature as well as for biliary stenting PROTEGE GPS The On-Target Stent Placement System The Protege™ GPS™ Self-Expanding Peripheral Stent is a self-expanding Nitinol stent system. The stent is made of a nickel titanium alloy (Nitinol) and comes on a 6F over-the-wire delivery system. The stent is cut from a Nitinol tube into an open lattice design and has tantalum radiopaque markers at the proximal and distal ends of the stent. Upon deployment, the stent achieves its predetermined diameter and exerts a constant, outward force to establish patency in the peripheral arteries. By Covidien - Medtronic ...
0039] The details of the invention and various embodiments can be better understood by referring to the figures of the drawing. Referring to FIG. 5, a graphical illustration of heat treatment profiles at 180 degrees C. is shown. The shape memory alloy material (a Ni--Ti shape memory alloy with a composition of about approximately 49.5 at. % Ni. and about approximately 50.5 at. % Ti) can be manufactured using metallurgical processes of melting, hot forging and rolling. Raw materials such as sponge Ti and Ni pellets can be melted at about approximately 1,300 to about approximately 1,600 degrees C. by melting in a furnace such as a high frequency vacuum induction melting furnace, arc melting furnace, or plasma melting furnace or the like. The material can be forged and rolled as appropriate. The material can then be formed into a primary product through cold working the material. Through cold working the shape and size of the material can be altered by plastic deformation or the increase of ...
Shape memory polymers (SMPs) is a class of polymeric materials that are capable of changing shapes under an external stimulus such as heat, light, solvents and electromagnetic induction. In this dissertation, we explore both the bulk and surface shape memory effect of polymers, understand the material properties, and develop potential applications. In the first case (Chapter 2, Chapter 3, and Chapter 4), wrinkles were developed utilizing the surface SM effect and were applied for cell culture. Wrinkling has been generally understood as a stress-driven instability phenomenon. In our bilayer system, the wrinkle formation is enabled by compressive buckling of a gold coating that is first applied to an SMP that has been fixed with a temporary uniaxial strain. The bilayer system is then recovered thermally to generate the wrinkles. The fundamentals of wrinkle characteristics and formation were investigated in Chapter 2. Gold film thickness and applied prestrain of the SMP substrate show a direct impact on
We are very pleased to report the completion of enrolment in these two studies, as the results will add important clinical data around treatment for patients with peripheral arterial disease," said Mark A Turco, chief medical officer, Vascular Therapies, Covidien. "The results of the studies will enable physicians to make evidence-based decisions to allow for optimal patient outcomes. Covidien remains committed to bringing clinical data to the forefront, while working toward obtaining important disease and anatomic- specific labeling indications for our products.". VISIBILITY Iliac and DURABILITY Iliac study designs. VISIBILITY Iliac and DURABILITY Iliac are prospective studies being conducted at 23 centres in the USA and Europe. Of the 150 patients enrolled in the studies, 75 were treated with the Visi-Pro balloon expandable stent system in VISIBILITY Iliac, and 75 were treated with either the EverFlex self-expanding stent system or the Protégé GPS self-expanding nitinol stent and delivery ...
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TiNiCu films were successfully prepared by co-sputtering of a TiNi target and a separate Cu target. Surface and cross-section microstructures of the deposited coating were analysed using Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM) and Transmission Electron Microscopy (TEM). Results showed that the deposited coating had fine grain size of about 300 to 400 nm and fully martensitic structure under room temperature. X-Ray Photoelectron Spectroscopy (XPS) indicated that there was an adherent and stable TiO2 oxide film on TiNiCu film surface, which can prevent Ni element from delamination. The deposited TiNiCu film has relatively strong (11 1) and (111) and relatively weak (010) texture. Results from Differential Scanning Calorimeter (DSC), in-situ X-Ray Diffraction (XRD) and curvature measurement revealed clearly martensitic transformation of the deposited TiNiCu films upon heating and cooling. Freestanding TiNiCu thin film showed clearly pronounced "two-way" shape memory ...
To evaluate our experience of limb salvage with bare nitinol stent enabled recanalization of long length occlusions of superficial femoral artery (SFA) and adjacent proximal popliteal artery (PPA) in diabetic patients. A total of 573 patients u
It is known that aluminum alloys can be classified as alloys for the production of castings and wrought alloys (rolling, extrusions, forgings and others). Wrought aluminum alloys are subdivided into heat-treatable alloys, those that respond to heat treatment to increase their mechanical strength and non heat-treatable alloys, whose mechanical properties can only be improved by cold working. The use of aluminum alloys has a great advantage due to the strength / weight ratio of Al, it has been used in industrial applications to different solutions, such as in the construction of automobiles, aerial and space vehicles, packaging and in overhead transmission lines. This paper aims to analyze the effect of heat treatment on the microhardness, ultimate tensile strength and in the elongation of the Al-0,18%Zr; Al-0.18%Zr-2.0%Mg and Al-0.18%Zr-6.0%Mg alloys compared to results obtained without heat treatment. The alloys were melted in a muffle furnace and cast in a water-cooled Cu mold. Samples were ...
E1917 - 13 Standard Test Method for Determination of Phosphorus in Nickel, Ferronickel, and Nickel Alloys by Phosphovanadomolybdate Spectrophotometry , ferronickel, molecular absorption spectrometry, nickel, nickel alloy, phosphorus content, spectrophotometric,
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Increased requirements for crash energy management in automotive interiors have led to increased application of magnesium alloy AM50A. Successful integration of this new alloy with hot chamber diecasting process technology requires substantial adjustment and attention to processes and practices. This paper details the conversion of magnesium AZ91D steering column diecastings to high ductility structural alloy. Description is given of the changes made to foundry practices, casting parameters, process compliance monitoring, and hot end component management. The resulting improvements allow production of components comparable to the traditional alloy in manufacturing process demands while offering improved ductility and impact strength ...
A surgical snare having a wire which forms the snare loop made from a shape memory effect metallic alloy which exhibits superelasticity at room temperature. The wire is trained so that it assumes an intermediate snare loop size in an unrestrained free state. From this trained free state configuration, the loop can be expanded to a large loop and contracted to a very small loop without permanent deformation from the trained intermediate state. This range of movement enables an expanded range of applicability for snares in general, and also enables reducing the instrument tip size with improved loop configuration.
The U-Flex Stent is a peripheral self-expanding nitinol stent indicated for use in the iliac artery, superficial femoral artery (SFA) and proximal popliteal artery. It is availabe from 30 mm up to 200 mm length, using high flexible fine mesh design... additional information. ...
296001346 - EP 1015670 A1 2000-07-05 - COLOURING MAGNESIUM OR MAGNESIUM ALLOY ARTICLES - [origin: WO9842892A1] This invention provides a method for the anodisation of magnesium or magnesium based alloys using an electrolytic solution (preferably derived primarily from phosphoric acid) containing ammonia, amines or both. The use of such an aqueous electrolytic solution (irrespective of other additions) in at least preferred forms alters the conditions under which anodisation can occur to provide a more than satisfactory coating on the magnesium material with reduced cycle times.[origin: WO9842892A1] This invention provides a method for the anodisation of magnesium or magnesium based alloys using an electrolytic solution (preferably derived primarily from phosphoric acid) containing ammonia, amines or both. The use of such an aqueous electrolytic solution (irrespective of other additions) in at least preferred forms alters the conditions under which anodisation can occur to provide a more than
Acculink is the most extensively implanted* and studied* carotid stent, and is now the only system approved for both high risk and standard surgical risk patients. The self-expanding nitinol stent offers an open cell, nested ring design for conformability and flexibility with three longitudinal spins designed to minimize stent shortening ...
Table of Contents Chapter One Aluminium Alloy Industry Overview 1.1 Aluminium Alloy Definition 1.2 Aluminium Alloy Classification and Application 1.3 Aluminium…
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Figure 12: The duty cycle of the PWM can be changed and output on PORTB, although the period will remain the same.. A potentiometer allows us to easily adjust the duty cycle without having to manually enter code. The ADC on the Mega32 reads the voltage across the potentiometer, adjusting the duty cycle based on the ratio of the voltage to Vcc.. Matlab was used to log data during testing. The microcontroller connects to Matlab using the RS232 interface. A Matlab script reads data sent by the microcontroller and stores it into an array. The data can then be graphed and analyzed.. Results. Most of the results have been stated in the design sections. Most of the design changes made over the course of the project have been minor changes to accommodate unexpected problems, like the lateral joint movement. The biggest change that needs to be made is to the second joint. A new design is discussed in the conclusion section.. One of the major goals of the project has been completed; the nitinol joint does ...
hollow shaft of superelastic Ti-50.8 atomic percent nickel shape memoryalloy has been investigated under torsional load by neutron diffraction.To optimize superelasticity the material was solution-annealed at850degreesC for 15 minutes, water quenched, and subsequently aged at500degreesC for 15 minutes. The torsional load was applied instrain-controlled mode and both torque and torsion angle were measured.The neutron diffraction data were analyzed by the Rietveld refinementprogram GSAS with a generalized spherical harmonic model for preferredorientation (or texture) to determine phase fractions andcrystallographic properties for B2 and B19 during the forward andreverse transformation which are associated with the acquired mechanicalhysteresis curve. ...
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Park, M. S.; Gibbons, S. L..; Arr´oyave, R.. Confinement Effects on Evolution of Intermetallic Compounds during Metallurgical Joint Formation. Journal of Electronic Materials, (2014), 43, pp. 2510-2520. Junkaew, A.; Ham, B.; Zhang, X.; Arr´oyave, R. Tailoring the Formation of Metastable Mg through Interfacial Engineering: a Phase Stability Analysis. CALPHAD, (2014), 45, pp. 145-150.. Chari, A.; Dogan, E.; Talapatra, A.; Chivukula, A.; Garay, A.; Karaman, I.; Arr´oyave, R. Computational Thermodynamics of the CoNiGa High Temperature Shape Memory Alloy System. CALPHAD, (2014), 45, pp. 167-177.. Santamarta, R.; Arr´oyave, R.; Pons, J.; Evirgen, A.; Karaman, I.; Karaca, H. E.; Noebe, R. D. TEM Study of Structural and Microstructural Characteristics of a Precipitate Phase in Ni-rich Ni-Ti-Hf and Ni-Ti-Zr Shape Memory Alloys Acta Materialia (2013), 61(16), pp.6191-6206.. Li, S.; Zhu, R.; Karaman, I.; Arr´oyave, R. Development of a Kinetic Model to Predict the Volume Fraction of Retained Austenite ...
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Alloy wheels are wheels that are made from an alloy of aluminium or magnesium. Alloys are mixtures of a metal and other elements. They generally provide greater strength over pure metals, which are usually much softer and more ductile. Alloys of aluminium or magnesium are typically lighter for the same strength, provide better heat conduction, and often produce improved cosmetic appearance over steel wheels. Although steel, the most common material used in wheel production, is an alloy of iron and carbon, the term "alloy wheel" is usually reserved for wheels made from nonferrous alloys. The earliest light-alloy wheels were made of magnesium alloys. Although they lost favor on common vehicles, they remained popular through the 1960s, albeit in very limited numbers. In the mid-to-late 1960s, aluminum-casting refinements allowed the manufacture of safer wheels that were not as brittle. Until this time, most aluminum wheels suffered from low ductility, usually ranging from 2-3% elongation. Because ...
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Light Weight Metal Corrosion and Modeling: Thin, Nanoparticulate Coatings for the Improvement of the Corrosion and Passivation Behavior of AZ Magnesium Alloys
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Magnesium - Science, Technology and Applications: Corrosion and Protection of Magnesium Alloys: An Overview of Research Undertaken by CAST
Metal-induced artifacts in computed tomography and magnetic resonance imaging: comparison of a biodegradable magnesium alloy versus titanium and stainless steel ...
Metal-induced artifacts in computed tomography and magnetic resonance imaging: Comparison of biodegradable magnesium alloy versus titanium and stainless steel ...
tional 47: 66-69 (2012) [7] H. K., Lee, H. S., Han, K. J., Son, and S. B. Hong., Optimization of Nd-YAG laser welding parameters for sealing small titanium tube ends. J. of Materials Science and Engineering, Vol. A415, pp.149-155 (2006) [8] L. K., Pan, C. C., Wang, Y. C., Hsiso and K. C., Ho, Optimization of Nd-YAG laser wel-ding onto magnesium alloy via Taguchi analysis. J. of Optics & Laser Technology, Vol. 37, pp. 33-42 (2004) [9] Ibrahim, I. Z., et al., The effect of Gas Metal Arc Welding (GMAW) processes on different welding parameters. Procedia Engineering 41. ...
This specification covers a magnesium alloy in the form of sand castings.,p,These products have been used typically for parts operating in service up to 300 degrees F (149 degrees C) but usage is not limited to such applications.. ...
TM 1-1500-204-23-6 Table 4-7. Identification of Magnesium Alloys Commercial designation Current DOW1 ASTM2 AMC3 specification Conditions Sheet and Plate FSI AX31A C52S QQ-M-44 O (Fully Annealed) H24 (Strain Hardened Partially Annealed) H26 (Strain Hardened Partially Annealed) AX31B O (Fully Annealed) H24 (Strain Hardened Partially Annealed) Rods, Bars, and Shapes JI AZ61A C57S QQ-M-31 As Extruded FSI AZ31B C52S QQ-M-31 As Extruded M MIA 3S QQ-M-31 As Extruded 01 AZ80A C58S QQ-M-31 As Extruded Tubing FSI AX31 A C52S WW-T-825 JI AZ61A C57S WW-T-825 M MIA 3S WW-T-825 Commercial designation Current DOW ASTM AMC specification Type Temper Castings H A263A 265 QQ-M-56 Sand AC (As Cast) HT (Heat-Treated and Aged) ACS (As Cast and Stabilized) HTS (Heat-Treated and Stabilized) M MIB 403 QQ-M-56 Sand AC C A292A 260 QQ-M-56 Sand AC HT HTA ACS HTS A291 QQ-M-56 Sand AC HT HTA See footnotes at end of table. 4-15 ...
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The hot deformation simulation of a ZK60 magnesium alloy at different temperatures from 373 to 673 K and different strain rates of 0.1, 0.01 and 0.002 s−1was studied by using the Gleebe-1500...
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In many alloy systems, hydrogen embrittlement under relatively high fugacity conditions occurs by intergranular fracture. One of these is the iron nickel alloy system which exhibits intergranular hydrogen related fracture when tested with a high supersaturation of solute hydrogen or while being cathodically charged with hydrogen. The results obtained on this alloy system indicate that the hydrogen embrittlement susceptibility decreases as the iron concentration of the alloy increased. These early measurements contained no information about the grain boundary chemistry and it is known that the effects of hydrogen are generally sensitive to the concentrations of other elements at grain boundaries. One particular element, sulphur, is known to increase the susceptibility of nickel alloys and fe alloys to hydrogen embrittlement although the mechanism of this increased susceptibility is not known. (JES)*HYDROGEN EMBRITTLEMENT
The expansion and stability of foams made from remelted aluminium alloy scrap has been studied. Foams made from scrap alloy contain oxide bi-films introduced from the swarf (machining chips and turnings) of LM26 alloy and these oxides act as stabilizing agents. The wettability of the oxides and hence the stabilisation is studied by varying the addition of Mg (0 to 2 wt.%) in the alloy. The viscosity of the melts with and without Mg addition is measured and correlated with foam expansion and stability. A detailed microstructural analysis of the base alloy and foam cell wall was conducted to obtain an understanding of the stabilisation behaviour of oxides.. ...
Article Effect of accelerators and stabilisers on crystallinity of binary and ternary electroless nickel alloys. Autocatalytic binary and ternary Ni-P, Ni-W-P alloys films were prepared using alkaline citrate-based baths. The effect of succinic acid ...
Stent implantation has attracted significant attention since the urgent need of coronary angioplasty as the most common cause of heart attacks. Shape memory materials are able to have two shapes at different conditions. Since the smart materials are self-expandable, the presence of the balloon in stents eliminates due its problems like designing, material properties and dimension of balloons. In this study, we focused on shape memory polymers which have lots of advantages in comparison with shape memory alloys such as high elastic deformation, excellent processability, light weight, low cost, low density, and potential of biocompatibility so they have become a proper candidate for implant materials. It has been found that mechanical properties of polymeric materials can be improved by introducing a uniform dispersion of nanoparticles. The main goal of this paper is to describe the progressive self-expansion shape memory Polyurethane/Polycaprolactane-ZnO nano-composite blends. Fabrication of ...
Up to 40% lighter than some steel cylinders, Aluminum Alloy cylinders are made of high strength aluminum alloy with a corrosion resistant interior...
The present invention provides an in-process method to repair voids in an aluminum alloy, particularly a friction stir weld in an aluminum alloy. For repairing a circular void or an in-process exit ho
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AMS2355J revises fatigue testing methodology for 2XXX and 7XXX plate alloys, greater than 4 inches thick, updates referenced standards, and is a Five Year Review and update of this specification.. ...
China Chromium Copper Alloy C18200 Leading Manufacturer, Find details about China Spot and Seam Welding, Flash Welding Dies from Chromium Copper Alloy C18200 Leading Manufacturer - Suhua Copper Alloy Co., Ltd.
Due to its unique characteristics, aluminum (Al) is used in a wide variety of commercial and industrial applications. Its utility can be further enhanced by combining it with other metals to create aluminum-based alloys, where the non-aluminum additives can make up to 15% of the total alloy, by weight. Because of its popularity and multiple compositions, the London Metal Exchange (LME) lists four different specifications for Al alloy compositions. In these specifications, silicon, copper, zinc, and iron are considered major additions, as they are mostly greater than 1% composition by weight. Therefore, these four elements must be determined with greater accuracy (± 2%) than the others. This work describes the determination of additives to Al in aluminum alloys at the LME specifications using the Avio® 200 hybrid scanning ICP-OES, an ideal choice for labs performing this application thanks to its charge-coupled device (CCD) detector, providing simultaneous background and analyte measurement, important
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The World Market for Nickel and Nickel Alloy Tubes, Pipes, and Tube or Pipe Fittings - A 2009 Global Trade Perspective (Electronic book text) / Author: Inc. Icon Group International ; 9780546359053 ; Books
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TY - JOUR. T1 - Computer simulation of spinodal decomposition in Fe-Cr-Ni ternary alloys and Fe-Cr-Mo-Ni quaternary alloys. AU - Yang, Ling Ling. AU - Saito, Yoshiyuki. PY - 2012. Y1 - 2012. N2 - Numerical simulations of phase separation in Fe-Cr-Ni ternary alloys and Fe-Cr-Mo-Ni quaternary alloys similar to ferrite phases in duplex stainless steels were performed with using of the Cahn-Hilliard equations. A new numerical model based on the Gauss-Seidel and Newton-Raphson methods were utilized to obtain efficient and accurate solution. We obtained that small addition of Ni retard phase separation of Cr in Fe-Cr-Ni ternary alloys. The simulation results on behavior of Mo and Ni in Fe-Cr-Mo-Ni ternary alloys were quite similar to Mo in Fe-Cr- Mo and Ni in Fe-Cr-Ni ternary alloys. It is known that behavior of Mo or Ni along the trajectory of the peak tops of Cr concentration is determined by the sign of second derivative of Cr and Mo or which of Cr and Ni. The effect of Ni on the peak height of Cr ...
The purpose of this study was to investigate the effect of silicon and iron on the weldability of HAYNES HR-160{reg_sign} alloy. HR-I60 alloy is a solid solution strengthened Ni-Co-Cr-Si alloy. The alloy is designed to resist corrosion in sulfidizing and other aggressive high temperature environments. Silicon is added ({approx}2.75%) to promote the formation of a protective oxide scale in environments with low oxygen activity. HR-160 alloy has found applications in waste incinerators, calciners, pulp and paper recovery boilers, coal gasification systems, and fluidized bed combustion systems. HR-160 alloy has been successfully used in a wide range of welded applications. However, the alloy can be susceptible to solidification cracking under conditions of severe restraint. A previous study by DuPont, et al. [1] showed that silicon promoted solidification cracking in the commercial alloy. In earlier work conducted at Haynes, and also from published work by DuPont et al., it was recognized that silicon
Alloy materials from Zhongnuo Advanced Material (Beijing) Technology Co., Ltd.. Search High Quality Alloy materials Manufacturing and Exporting supplier on Alibaba.com.
RAYNHAM, Mass., May 11, 2011 /PRNewswire/ -- Doctors in Germany are among the first to treat ischemic stroke patients outside the United States with the REVIVE™ SE, a new self-expanding blood clot retrieval and removal device designed to remove blood clots and restore blood flow to the brain in patients having a stroke. Codman & Shurtleff, Inc., a global neuroscience and neurovascular company, received Conformite Europeenne (CE) mark authorization for the REVIVE™ SE in February 2011. CE mark approval means that the product has been deemed safe for use in occlusions or blockages in blood vessels or grafts and can now be marketed for this indication in all Member States of the European Union (EU), European Economic Area and Switzerland. The device is not approved for distribution in the United States.. "This device is an important new option because it may provide advantages over currently available treatments," said Martin Bendszus*, MD, Department of Neuroradiology, University of Heidelberg ...
New titanium alloys with improved biocompatibility have been developed for dental and biomedical applications. The osseointegration of implants depends on surface properties of these alloys; nature of the oxide film at the metal-oxide-bone. Also stress acted on the interface between bone and implant can occur the bone resorption due to stress shielding effects. So we have tried to improve this effect by manufacture of new ternary alloy containing Ta, Nb, and Zr alloying elements. The nanotube was formed mainly on -phase in case of Ti 30Ta-3Zr and Ti-30Nb-3Zr, but formed on -phase in case of Ti 30Ta-13Zr and Ti-30Nb-3Zr alloys. The polarization resistance of nanotube-formed new ternary alloy was lower than that of the non-nanotube formed alloy
Youre probably asking yourself "What is Shape Memory Alloy?" It sounds fancy and futuristic, but has actually been around in one way or another for decades. Very simply put, it is a metal alloy that can be deformed via heat, and return to its original form once it cools down. So how will GM apply this to engines?. The idea is to run exhaust gasses through different loops of SMA, turning an electric generator and thereby producing excess electricity. This surplus of power could then be used to augment an ICE engine with a hybrid drivetrain. As is already known, cars run purely on electric power tend to have their range cut short when certain accessories like air conditioning, heat, or flashing strobes are applied.. The idea of recycling waste heat to produce electric energy on an engine isnt a new idea either, and $2.7 million is a lot of ching to make a working prototype. Hopefully this isnt another pipe dream or dead end, though in theory the concept almost seems… sound? GM is partnering ...
The Department of Mechanical and Industrial Engineering Presents. Dr. Mohammad Elahinia. Associate Professor of Mechanical Engineering, University of Toledo. Topic: Additively Manufacturing NiTi Shape Memory and Superelastic Devices: A New Paradigm for Biomimetic Control. Abstract: Nickel-Titanium (NiTi) shape memory alloys (SMAs) with near-equiatomic exhibit both a thermal shape memory and superelasticity. Both effects are based on a reversible martensitic phase transformation. This type of the effect primarily depends on the transformation temperatures, which can be adjusted through variation in the Ni-Ti ratio. Currently, NiTi is the most commonly used SMA due to its outstanding functional characteristics and high working capacity, which far exceeds other SMAs. Due to the unique thermo-mechanical characteristic of these alloys, fabricating them to complex geometries has remained nearly impossible. Using additive manufacturing we have been able to achieve geometries and functionalities that ...
The low density and high specific strength of magnesium alloys have created a great deal of interest in the use of these alloys in the automotive and aerospace industries and in portable electronics. All of these industries deal with applications in which weight is extremely important. However, an obstacle to overcome when using magnesium alloys in engineering applications are their unsatisfactory corrosion properties. This thesis is devoted to the atmospheric corrosion of the two magnesium alloys AZ91D and AM50, in particular the ways the microstructure and exposure parameters of these alloys influence their corrosion behaviour. The work includes both laboratory and field studies. The results obtained show that the microstructure is of vital importance for the corrosion behaviour under atmospheric conditions.. The microstructure of magnesium-aluminium alloys contains different intermetallic phases, e.g. Al8Mn5 and β-Mg17Al12. The local nobility of these intermetallic phases was measured on a ...
This report covers the present scenario and the growth prospects of the Global Metal Working Fluids market for the period 2014-2018. To arrive at a ranking of the leading vendors of the market, and to calculate the market size, the report considers the revenue generated through the sales of metal working fluids. It also presents the vendor landscape and a corresponding detailed analysis of the top four vendors in the Global Metal Working Fluids market. The report also provides data on the different segments of the Global Metal Working Fluids market, which are based on the following ...
Amco Metal - Manufacturers and exporters of inconel alloy, nickel chromium alloy, industrial inconel alloy, industrial nickel chromium alloy, inconel alloys, nickel chromium alloys, inconel pipes, inconel tubes, inconel fittings, inconel flanges, inconel sheets, inconel plates, inconel coils, inconel fasteners, India
Sliding friction experiments were conducted with various iron-base alloys (alloying elements were Ti, Cr, Mn, Ni, Rh, and W) in contact with a single-crystal silicon carbide (0001) surface in vacuum. Results indicate atomic size misfit and concentration of alloying elements play a dominant role in controlling adhesion, friction, and wear properties of iron-base binary alloys. The controlling mechanism of the alloy properties is as an intrinsic effect involving the resistance to shear fracture of cohesive bonding in the alloy. The coefficient of friction generally increases with an increase in solute concentration. The coefficient of friction increases as the solute-to-iron atomic radius ratio increases or decreases from unity. Alloys having higher solute concentration produce more transfer to silicon carbide than do alloys having low solute concentrations. The chemical activity of the alloying element is also an important parameter in controlling adhesion and friction of alloys.. ...
We report the case of a rare complication after coronary artery bypass graft (CABG) with non-traumatic fracture of nitinol thermoreactive sternal clips resulting a postoperative partial sternal dehiscence. A 61-year-old female patient administered to our department with severe coronary stenosis by coronary angiography and stabil angina pectoris symptoms. Physical examination were within normal limits. The electrocardiogram showed a normal sinus rhythm for 75/min. Arterial blood pressure was 130/90 mmHg. Lungs and heart were clear to auscultation. Patient was diagnosed with diabetes mellitus (DM) for several years with insulin treatment. She was obese with body mass index (BMI) 36.8 kg/m2. Rest of the physical and clinical evaluation was within normal limits. After preoperative preperation, patient underwent to three vessel CABG with conventional cardiopulmonary bypass. Due to intraoperative findings of obvious sternal osteoporosis and co-morbidities such as DM and higher BMI we applied 3 nitinol ...
A Guglielmi detachable coil (GDC) is a medical device made of platinum used in the treatment of brain aneurysms. It led to a revolutionary advance in the field of endovascular minimally-invasive surgery for the occlusion of cerebral vascular disease. Invented by Dr. Guido Guglielmi, Italian neurosurgeon and professor of UCLA interventional neuroradiology in 1990, and gradually introduced in the later 1990s as an alternative to invasive surgical clipping. In September 1995, the Guglielmi Detachable Coil (GDC) system received formal approval from the U.S. Food and Drug Administration (FDA) for treatment of surgically high-risk intracranial aneurysms. Due to advances and patent rights, not all coils used today are GDCs, however they are modeled on the same mechanism. These coils have special physical and electrolytic properties: the material is a high shape-memory alloy, allowing it to easily bend and regain its original coil shape. These platinum coils are fairly soft and adaptable to the shape ...
Metallic aluminum alloy foils exposed oil the forward, comet-facing surface of the aerogel tray oil the Stardust spacecraft are likely to have been impacted by the same cometary particle Population as the dedicated impact sensors and the aerogel collector. The ability of soft aluminum alloy to record hypervelocity impacts as bowl-shaped craters offers all opportunistic substrate for recognition of impacts by particles of a potentially wide size range. In contrast to impact surveys conducted oil samples from low Earth orbit, the simple encounter geometry for Stardust and Wild-2, with a known and constant spacecraft-particle relative velocity and effective surface-perpendicular impact trajectories, permits closely comparable simulation in laboratory experiments. For a detailed calibration program, we have selected a suite of spherical glass projectiles of uniform density and hardness characteristics, with well-documented particle size range from 10 mu m to nearly 100 mu m. Light gas gun buckshot ...
Currently, aortic valve replacement procedures require a sternotomy and use of cardiopulmonary bypass (CPB) to arrest the heart and provide a bloodless field in which to operate. A less invasive alternative to open heart surgery is transapical or transcatheter aortic valve replacement (TAVR), already emerging as a feasible treatment for patients with high surgical risk. The bioprosthetic valves are delivered via catheters using transarterial or transapical approaches and are implanted within diseased aortic valves. This paper reports the development of a new self-expanding stent for minimally invasive aortic valve replacement and its delivery device for the transapical approach under real-time magnetic resonance imaging (MRI) guidance. Made of nitinol, the new stent is designed to implant and embed a commercially available bioprosthetic aortic valve in aortic root. An MRI passive marker was affixed onto the stent and an MRI active marker to the delivery device. These capabilities were tested in ...
Lower extremity ischemia following deployment of a vascular closure device for access site closure after a transfemoral endovascular procedure rarely occurs. A 68-year-old woman diagnosed with subarachnoid hemorrhage due to a ruptured anterior communicating aneurysm was treated by endovascular coil embolization. The StarClose SE device was deployed for right femoral arteriotomy closure. After 2 days, critical ischemia occurred on her right lower leg due to total occlusion of the popliteo-tibial artery. Emergent surgical embolectomy was performed and the nitinol clip of the StarClose device was captured in the lumen of the tibioperoneal trunk. Although StarClose is an extravascular closure system, intravascular deployment, distal migration, and resultant critical limb ischemia can occur. ...

Alloy Software - IT Service Desk and Asset Management SoftwareAlloy Software - IT Service Desk and Asset Management Software

The Alloy support team has been an enormous help to me during the implementation of Alloy Navigator. The team has outstanding ... Alloy Software Introduces Intelligent Relationship Mapping to Alloy Navigator Platform. New release helps organizations manage ... Alloy Software Introduces Intelligent Relationship Mapping to Alloy Navigator PlatformJuly 16, 2018 ... I like Alloy Support because the technicians are knowledgeable and help me get the job done. They are also very friendly and ...
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shape memory alloys - Wiktionaryshape memory alloys - Wiktionary

Retrieved from "https://en.wiktionary.org/w/index.php?title=shape_memory_alloys&oldid=41644648" ...
more infohttps://en.wiktionary.org/wiki/shape_memory_alloys

Magnesium alloys - Everything2.comMagnesium alloys - Everything2.com

... so alloy , alloys that are made mainly from it are very light. Recently, they have become popular for the casings ... ... The VW Beetle contains a lot of magnesium alloy parts.. Properties of AM60A and AM60B Magnesium alloys *Tensile Strength - 220 ... titanium alloys. Metallurgy. Magnesium. Materials science and engineering. anodize. Vehicle safety. James Economy. Metal in a ... The density of magnesium is very low, so alloys that are made mainly from it are very light. Recently, they have become popular ...
more infohttps://everything2.com/title/Magnesium+alloys

Alloys of Metals - Scientific AmericanAlloys of Metals - Scientific American

Thus an alloy of 21-21 copper, and 78-79 tin, is not brittle ; but an alloy of 34-98 copper, and 65-02 tin is very brittle. ... In alloys of copper and tin-common bronze- an excess of tin renders the alloy soft, as would be expected, because it is the ... Thus an alloy of zinc 50, copper 49, was in hardness as compared with cast iron -604; while an alloy of copper 66, zinc 33, was ... When the copper is increased to make an alloy of 84-68 copper, and 15-32 tin, the brittleness is removed, and the alloy is very ...
more infohttps://www.scientificamerican.com/article/alloys-of-metals-1858-06-05/

alloys Archives - Geek.comalloys Archives - Geek.com

Browse alloys articles on Geek.com for the latest reviews, news, pictures, information about downloads and pricing, and other ... The Latest in Alloys. Science! The Pentagon Investigated UFOs, and They Found Some Weird Stuff. By Daniel Starkey :: 12.21.2017 ...
more infohttps://www.geek.com/tag/alloys/

Service Characteristics of Light AlloysService Characteristics of Light Alloys

Physical properties of the pure metals and their alloys are given and the effects of adding small quantities of alloying ... are discussed in their pure and alloyed states. ... Service Characteristics of Light Alloys 290064. ALUMINUM and ... Aluminum alloys Alloys Corrosion Aluminum Metals Magnesium Coatings, colorants, and finishes Aircraft Drag ... Physical properties of the pure metals and their alloys are given and the effects of adding small quantities of alloying ...
more infohttps://www.sae.org/publications/technical-papers/content/290064/

Alloys | HackadayAlloys | Hackaday

alloys. 1 Articles Lead-Free Solder Alloys: Their Properties And Best Types For Daily Use. January 28, 2020 by Maya Posch 84 ... Posted in Engineering, Featured, Original Art, Science, SliderTagged alloys, sac, sn100c, solder alloys, soldering. ... Lead-free solder alloys have been around for as long as people have done soldering, with sources dating back about 5,000 years ... Most of these alloys were combinations like copper-silver or silver-gold and used with so-called hard soldering. Thats a ...
more infohttps://hackaday.com/tag/alloys/

Impression Creep of Lightweight AlloysImpression Creep of Lightweight Alloys

Citation: Chen, R., Yang, F., and Lu, Y., "Impression Creep of Lightweight Alloys," SAE Int. J. Mater. Manuf. 3(1):120-124, ... Impression Creep of Lightweight Alloys 2010-01-0226. Conventional creep testing requires many samples and therefore is time ... In the present study, the creep behaviors of two lightweight magnesium alloys were studied by using impression creep tests in ...
more infohttps://www.sae.org/publications/technical-papers/content/2010-01-0226/

Exhibitor: MILWARD ALLOYSExhibitor: MILWARD ALLOYS

These alloys are produced utilizing an induction melting & alloying process followed by static mold or direct chill continuous ... formed into particular alloying compounds Milwards line of master alloys for the aluminum industry include grain refiners, ... Milward manufactures aluminum and copper based master alloys for industries that melt and cast aluminum and copper metals. ... Master alloys are precisely calculated combinations of metal elements, occasionally with chemical additives, ...
more infohttp://www.tms.org/Meetings/Annual-00/Expo2000/Exhibitors/Milward.html

Ceramic AlloysCeramic Alloys

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Cobalt-Platinum Alloys: Ingenta ConnectCobalt-Platinum Alloys: Ingenta Connect

Johnson Mattheys journal of research on the platinum group metals and developments in their application in industry from 1957-2014. It has now been renamed the Johnson Matthey Technology Review ...
more infohttps://www.ingentaconnect.com/content/matthey/pmr/1963/00000007/00000003/art00007

Alloys from the laser printerAlloys from the laser printer

Alloys not feasible by classical casting. However, the manufacture of components using ODS alloys is currently subject to ... Alloys from the laser printer. Rainer Klose Kommunikation. Empa - Eidgenössische Materialprüfungs- und Forschungsanstalt In the ... Titan-Aluminum alloys are combining low density, high strength and oxidation resistance at elevated temperatures and are ... The aim of the awarded PhD thesis of Christoph Kenel was to develop a novel titanium aluminide (TiAl) alloy, particularly for ...
more infohttps://idw-online.de/de/news684618

Alloys by Mr Collinson on PreziAlloys by Mr Collinson on Prezi

Do you really want to delete this prezi? Neither you, nor the coeditors you shared it with will be able to recover it again. DeleteCancel ...
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Alloys | Science News | Naked ScientistsAlloys | Science News | Naked Scientists

The Naked Scientists® 2000-2016 , The Naked Scientists® and Naked Science® are registered trademarks created by Dr Chris Smith. Information presented on this website is the opinion of the individual contributors and does not reflect the general views of the administrators, editors, moderators, sponsors, Cambridge University or the public at large.. ...
more infohttps://www.thenakedscientists.com/articles/science-news/alloys

Chrome coatings replaced with safer alloys - RedorbitChrome coatings replaced with safer alloys - Redorbit

However, Schuh and his colleagues have developed a new nickel-tungsten alloy that they say is not only safer than chrome, but ... U.S. scientists say theyve created a new alloy to replace chrome as a protective shiny coating, thereby eliminating the ... Schuhs team showed nickel-tungsten alloys remain stable indefinitely at room temperature and are highly resistant to ...
more infohttp://www.redorbit.com/news/science/1694718/chrome_coatings_replaced_with_safer_alloys/

Alloy - Everything2.comAlloy - Everything2.com

alei, F. aloyer, to alloy, alier to ally. See Alloy, v. t.] 1. Any combination or compound of metals fus... ... Al*loy", n. [OE. alai, OF. alei, F. aloyer, to alloy, alier to ally. See Alloy, v. t.] 1. Any combination or compound of metals ... Al*loy", v. t. [imp. & p. p. Alloyed (#); p. pr. & vb. n. Alloying.] [F. aloyer, OF. alier, allier, later allayer, fr. L. ... See Alloy, n., Ally, v.t., and cf. Allay.] 1. To reduce the purity of by mixing with a less valuable substance; as, to alloy ...
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Padmanabh Alloys & Polymers Ltd. News | Announcement | RecosPadmanabh Alloys & Polymers Ltd. News | Announcement | Recos

PADMANABH ALLOYS & POLYMERS LTD.has informed BSE that the meeting of the Board of Directors of the Company is scheduled on 14/ ... PADMANABH ALLOYS & POLYMERS LTD.has informed BSE that the meeting of the Board of Directors of the Company is scheduled on 05/ ... PADMANABH ALLOYS & POLYMERS LTD.has informed BSE that the meeting of the Board of Directors of the Company is scheduled on 06/ ... PADMANABH ALLOYS & POLYMERS LTD.has informed BSE that the meeting of the Board of Directors of the Company is scheduled on 30/ ...
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CDC - NIOSH - Radiation Dose Reconstruction - Titanium Alloys ManufacturingCDC - NIOSH - Radiation Dose Reconstruction - Titanium Alloys Manufacturing

Also known as: Humphreys Gold Co., Titanium Alloys Mfg. Co., Div. Of National Lead, Titanium Alloy Metals, Titanium Pigment Co. ... Public Comments on Titanium Alloys Manufacturing Documents. How to Submit Comments. Comments on Titanium Alloys Manufacturing ... All employees who worked in any area or building at Titanium Alloys Manufacturing from January 1, 1955, through December 31, ... To date, there are no open/active SEC petitions from Titanium Alloys Manufacturing. ...
more infohttps://www.cdc.gov/niosh/ocas/titanalloy.html

Metal Alloys | Nova Science PublishersMetal Alloys | Nova Science Publishers

Home / Shop / Books / Science and Technology / Technology and Engineering / Materials Science / Metal Alloys. Metal Alloys. ... Heusler Alloys: Structure, Properties and Applications Materials Science and Technologies, Metal Alloys ... Titanium Alloys: Types, Properties and Research Insights Mechanical Engineering Theory and Applications, Chemistry Research and ... Applications, Metal Alloys, Materials Science, Technology and Engineering, Chemical Engineering, Chemistry ...
more infohttps://novapublishers.com/product-category/books/science-and-technology/technology-and-engineering/materials-science/metal-alloys/

Alloys: Preparation, Properties, Applications - Wiley Online LibraryAlloys: Preparation, Properties, Applications - Wiley Online Library

... primary-metal alloys, light-metal alloys, and some other alloy systems.. The work is based on more than 30 articles from ... In this way some specific properties are improved, making the alloy more attractive than the pure metal. The present work ... Classification, properties, preparation, applications, and economic aspects are discussed for alloy steels, ... comprises essential information on alloys in one compact volume.. ...
more infohttp://onlinelibrary.wiley.com/book/10.1002/9783527611935?systemMessage=Wiley+Online+Library+is+migrating+to+a+new+platform+powered+by+Atypon%2C+the+leading+provider+of+scholarly+publishing+platforms.+The+new+Wiley+Online+Library+will+be+migrated+over+the+weekend+of+March+17+and+18.You+should+not+experience+any+issues+or+loss+of+access+during+this+time.+For+more+information%2C+please+visit+our+migration+page%3A++http%3A%2F%2Fwww.wileyactual.com%2FWOLMigration%2F

AlloysAlloys

Hydro is a leading supplier of high-grade aluminium alloys, which are tailor-made mixtures of aluminium and other metals to ... Alloys Aluminium alloys. Hydro is a leading supplier of high-grade aluminium alloys, which are tailor-made mixtures of ... Interested in aluminium alloys?. We often develop the alloy in close cooperation with our customers, ensuring a perfect match ... Aluminium alloys are usually used to enhance aluminiums properties for specific engineering structures and components where ...
more infohttps://www.hydro.com/en-FR/about-aluminium/facts-about-aluminium/alloys/

Structure of Quenched Ti-Ru Alloys | SpringerLinkStructure of Quenched Ti-Ru Alloys | SpringerLink

Quenched titanium-ruthenium alloys containing 0.25-4 at % ruthenium have been studied using X-ray diffraction analysis, optical ... In Ti-1.5 at % Ru and Ti-2 at % Ru alloys, a martensitic β → α″ transformation occurs. The quenched Ti-3 at % Ru alloy has a β ... Ti-Ru alloys structure α″ phase ω phase Original Russian Text © A.V. Dobromyslov, N.I. Taluts, 2018, published in Fizika ... A. V. Dobromyslov and V. A. Elkin, "β → α and β → ω transformations in Ti-Os alloys," Metall. Mater. Trans. A 30, 231-233 (1999 ...
more infohttps://link.springer.com/article/10.1134/S0031918X18030043

Structural and Phase Stability of Alloys | SpringerLinkStructural and Phase Stability of Alloys | SpringerLink

This vohune contains the papers presented at the Adriatico Research Conference on Structural and Phase Stability of Alloys held ... On the Causes of Compositional Order in NiPt Alloys B. L. Györffy, F. J. Pinski, B. Ginatempo, D. D. Johnson, J. B. Staunton, W ... Structural Phase Transformations in Alloys: An Electron Microscopy Study G. Van Tendeloo, D. Schryvers, L. E. Tanner, D. ... It was clear from these presentations that the phenomenological models and simulations in alloy theory have reached a high ...
more infohttps://link.springer.com/book/10.1007/978-1-4615-3382-5

3D printing of high-strength aluminium alloys | Nature3D printing of high-strength aluminium alloys | Nature

Zirconium nanoparticles introduced into aluminium alloy powders control solidification during 3D printing, enabling the ... Aluminium alloy 7075 micropowder. Aluminium alloy 7075 micropowder was purchased from Valimet Inc. The powder consisted of Al ( ... Aluminium alloy 6061 micropowder. Aluminium alloy 6061 micropowder was purchased from Valimet Inc. The powder consisted of Al ( ... Aluminium alloys are a good demonstration platform for our approach, because the only printable aluminium alloys are based on ...
more infohttps://www.nature.com/articles/nature23894?error=cookies_not_supported&code=6a2aaa72-0103-4e76-b1b8-5fc17e1bfecf
  • Every person is familiar with regard to the comparative hardness of these two bodies, but very few are acquainted with the comparative hardness of other bodies, especially metals and their alloys, although a scale of hardness has long been adopted among mineralogists. (scientificamerican.com)
  • Physical properties of the pure metals and their alloys are given and the effects of adding small quantities of alloying elements are shown. (sae.org)
  • Given that rastering of this direct energy source (such that it follows a pattern of slightly overlapping lines in a back and forth pattern) to continuously fuse successive layers of powder is analogous to welding processes, it is not surprising that the suite of printable metal alloys are limited to those known to be easily weldable. (nature.com)
  • Figure 1: Additive manufacturing of metal alloys via selective laser melting. (nature.com)
  • but an alloy of 34-98 copper, and 65-02 tin is very brittle. (scientificamerican.com)
  • On the other hand, an increased quantity of copper-from but one-third to that of the quantity of tin in the bronze, up until it (the copper) is four times the quantity of tin-renders the alloy brittle, a result which would not be expected, judging from the nature of the metals in their simple conditions. (scientificamerican.com)
  • The topic is very challenging, since TiAl alloys are inherently brittle at room temperature, and the rapid solidification conditions during AM can lead to complex phase transformation sequences, pronounced element segregation and cracking. (idw-online.de)
  • This makes the metal harder and more brittle than a single-phase alloy, and also affects the way the metal responds to hardening by hammering and lathing, and greatly restricts the use of mechanised techniques of manufacture. (wikipedia.org)
  • Schuh's team showed nickel-tungsten alloys remain stable indefinitely at room temperature and are highly resistant to decomposition when heated. (redorbit.com)
  • Such an alloy is two-phase at room temperature, like bell metal, and cannot be cold-rolled so the cymbals must be produced by the traditional casting process. (wikipedia.org)
  • H. J. Lee and H. I. Aaronson, "Eutectoid Decomposition Mechanisms in Hypoeutectoid Ti-X Alloys," J. Mater. (springer.com)
  • Considering the oxide dispersoids, Kenel and his colleagues hypothesized that laser-based AM can be used successfully to create bulk samples from oxide dispersoid-containing powders, as the very short melting time and very rapid solidification would keep the oxide dispersoids well dispersed within the alloy grains. (idw-online.de)
  • In metal-based additive manufacturing, application of a direct energy source, such as a laser or electron beam, to melt alloy powders locally results in solidification rates between 0.1 m s −1 and 5 m s −1 , an order of magnitude increase over conventional casting processes. (nature.com)
  • In the future, new designer alloys for aerospace applications can be manufactured using the 3-D laser melting process (Additive Manufacturing). (idw-online.de)
  • Dr. Kenel decided for a novel approach to develop a TiAl alloy specifically for the additive manufacturing (AM) process. (idw-online.de)
  • Our approach to metal-based additive manufacturing is applicable to a wide range of alloys and can be implemented using a range of additive machines. (nature.com)
  • It thus provides a foundation for broad industrial applicability, including where electron-beam melting or directed-energy-deposition techniques are used instead of selective laser melting, and will enable additive manufacturing of other alloy systems, such as non-weldable nickel superalloys and intermetallics. (nature.com)
  • The limitations of the currently printable alloys, especially with respect to specific strength, fatigue life and fracture toughness, have hindered metal-based additive manufacturing from maturing to its full potential. (nature.com)
  • Early soft soldering used pure tin (Sn), yet gradually alloys were sought that would fix issues like thermal cycling, shock resistance, electron migration, and the development of whiskers in tin-based alloys. (hackaday.com)
  • Titan-Aluminum alloys are combining low density, high strength and oxidation resistance at elevated temperatures and are therefore of high technical relevance e.g. in aerospace engineering. (idw-online.de)
  • Protection afforded to aluminum alloy by a surface coating of pure aluminum is described, and other methods are mentioned. (sae.org)
  • Master alloys are precisely calculated combinations of metal elements, occasionally with chemical additives, formed into particular alloying compounds Milward's line of master alloys for the aluminum industry include grain refiners, modifiers, and hardeners. (tms.org)
  • Most of these alloys were combinations like copper-silver or silver-gold and used with so-called hard soldering. (hackaday.com)
  • During solidification of these unweldable alloys, the primary equilibrium phase solidifies first at a different composition from the bulk liquid. (nature.com)
  • In this way some specific properties are improved, making the alloy more attractive than the pure metal. (wiley.com)
  • The present work comprises essential information on alloys in one compact volume. (wiley.com)
  • While lead (Pb) managed to fill this role for most soldering applications, the phasing out of lead from products, as well as new requirements for increasingly more fine-pitched components have required the development of new solder alloys that can fill this role. (hackaday.com)
  • Lead-free solder alloys have been around for as long as people have done soldering, with sources dating back about 5,000 years . (hackaday.com)
  • These alloys are produced utilizing an induction melting & alloying process followed by static mold or direct chill continuous casting. (tms.org)
  • U.S. scientists say they've created a new alloy to replace chrome as a protective shiny coating, thereby eliminating the dangerous chrome industrial process. (redorbit.com)
  • Padmanabh Alloys & Polymers Board Meeting Intimation for Considering Un-Audited Financial Results For Half Year Ended On 30/09/2019. (indiatimes.com)
  • PADMANABH ALLOYS & POLYMERS LTD.has informed BSE that the meeting of the Board of Directors of the Company is scheduled on 14/11/2019 ,inter alia, to consider and approve un-audited financial results for half year ended on 30/09/2019. (indiatimes.com)
  • Padmanabh Alloys & Polymers Board Meeting Intimation for Considering And Approving Un-Audited Financial Results For First Quarter Ended 30.06.2019. (indiatimes.com)
  • We often develop the alloy in close cooperation with our customers, ensuring a perfect match between the metal and the challenge at hand. (hydro.com)
  • Tube Alloys was a codename of the clandestine research and development programme, authorised by the United Kingdom, with participation from Canada, to develop nuclear weapons during the Second World War. (wikipedia.org)
  • The object of the authors of this paper was to present something reliable and usefal regarding the hardness of alloys. (scientificamerican.com)
  • This vohune contains the papers presented at the Adriatico Research Conference on Structural and Phase Stability of Alloys held in Trieste, Italy, in May 1991, under the auspices of the International Centre for Theoretical Physics. (springer.com)
  • ELG Utica Alloys International GmbH. (fastbot.de)