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Shape memory properties of the Ti36Ni49Hf15 high temperature shape memory alloy
Materials Letters, 2000Abstract The shape memory properties have been studied in a Ti 36 Ni 49 Hf 15 high temperature shape memory alloy (SMA) by bending tests. The shape memory effect (SME) of the alloy is closely related to the deformation condition. It shows about 3% completely reversible strain when the TiNiHf alloy is deformed at the room temperature.
X.L Meng, Y.F Zheng, Z Wang, L.C Zhao
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Development of High-Temperature Shape Memory Alloys
2020Shape memory alloys are vigorous metallic smart materials used as actuators and sensors in great technology as smart systems. The term shape memory refers to the ability of certain materials to recall a shape; even later severe plastic deformations. Many researchers all over the world are engaged in the development of low-cost, high-temperature and ...
Shyam Singh Rawat +3 more
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Alloying of ZrCu-based high temperature shape memory alloys
Journal de Physique IV (Proceedings), 2003A systematic study was carried out by means of paramagnetic susceptibility measurements, X-ray diffractometry, and X-ray photoelectron spectroscopy (XPS) in order to determine crystal and electronic structure changes along with alloying additions. The experimental MT temperatures were compared with those calculated for ZrCu-based alloys with the help ...
G. S. Firstov +3 more
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High Temperature Shape Memory Alloys
Journal of Engineering Materials and Technology, 1999Several alloy systems can be selected for high-temperature shape memory alloys, defined as alloys with stable reverse transformation temperatures above 120°C. However, due to the lack of minimum quality standards for stability, ductility, functional behavior and reliability, no successful applications have been realized so far.
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Mechanical and shape memory properties of Ni54Mn25Ga21 high-temperature shape memory alloy
Materials Science and Engineering: A, 2006Abstract The mechanical properties and shape memory effect of polycrystalline Ni 54 Mn 25 Ga 21 (at.%) high-temperature shape memory alloy have been determined by measurement of the compressive stress–strain behavior at different temperatures. The Ni 54 Mn 25 Ga 21 alloy possesses a martensitic transformation temperature as high as 532 K and a ...
Yan Li +3 more
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, 2020
High-pressure torsion (HPT) processing under a pressure of 6.0 GPa was applied to Ti29.7Ni50.3Hf20 (at.%) alloy. Two types of structure were observed after HPT with 3 revolutions: first one is the mixture of amorphous phase and retained nanocrystalline ...
A. Shuitcev +5 more
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High-pressure torsion (HPT) processing under a pressure of 6.0 GPa was applied to Ti29.7Ni50.3Hf20 (at.%) alloy. Two types of structure were observed after HPT with 3 revolutions: first one is the mixture of amorphous phase and retained nanocrystalline ...
A. Shuitcev +5 more
semanticscholar +1 more source
High‐Temperature Corrosion of NiTi‐Shape‐Memory Alloys
Materialwissenschaft und Werkstofftechnik, 2004AbstractSemi‐finished products and components made of NiTi‐shape‐memory alloys (NiTi‐SMA) are often subjected to heat treatment after their fabrication. During this heat treatment, oxide layers begin to form which contain a high amount of titanium.In this investigation special attention was drawn to the selective oxidation of Ti because a TiOX‐layer ...
C. Heßing +3 more
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A Shape-Memory Alloy for High-Temperature Applications
JOM, 1982An alloy based on the Cu-Al-Ni ternary system has been developed at the research center of Brown, Boveri & Co., Baden, Switzerland, which provides a fully reversible (two-way) shape memory effect at significantly higher temperatures than those afforded by commercial memory alloys such as NiTi and Cu-Zn-Al.
Thomas W. Duerig +2 more
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Characteristics of Ti50Pd30Ni20 high-temperature shape memory alloy
Intermetallics, 1995The decrease in critical stress for slip with increasing temperature leads to the introduction of permanent strain and thus deteriorates shape memory (SM) characteristics of high-temperature SM alloys. Thermomechanical treatment consisting of cold-rolling and subsequent annealing at various temperatures, was applied for the first time to improve the ...
Golberg, D. +6 more
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Fabrication of quaternary high temperature shape memory alloys
AIP Conference Proceedings, 2019In today’s technology, the useful materials attract more attention for sustainable of energy sources. Shape memory alloys (SMAs) are one of these useful materials due to their unique properties as pseudoelasticity and shape recovery property. SMAs can be classified as Cu-based (Cu-Zn, Cu-Al and Cu-Sn), Iron-based and NiTi.
H. Mustafa Ahmed +2 more
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