Results 261 to 270 of about 6,618 (297)

High Temperature Shape Memory Alloys

Journal of Engineering Materials and Technology, 1999
Several 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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Fabrication of quaternary high temperature shape memory alloys

AIP Conference Proceedings, 2019
In 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, C. Aksu Canbay, İ. Özkul   +2 more
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Characteristics of Ti50Pd30Ni20 high-temperature shape memory alloy

Intermetallics, 1995
The 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., Xu, Ya, Murakami, Y., Morito, S., Otsuka, K., Ueki, T., Horikawa, H.   +6 more
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High Temperature Shape Memory Alloys Problems and Prospects

Journal of Intelligent Material Systems and Structures, 2006
In this article, a review of the existing high temperature shape memory alloy (HTSMA) systems is given. Certain crucial disadvantages general to all HTSMAs and related to structural mechanisms of the martensitic transformation (MT) taking place at elevated temperatures are described. The perspectives of the HTSMA's application are also discussed.
G. S. Firstov, J. Van Humbeeck, Yu. N. Koval   +2 more
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High temperature shape memory behavior of Ni47.3Ti29.7Hf20Pd3 alloys

Intermetallics, 2019
Abstract The shape memory properties of Ni47.3Ti29.7Hf20Pd3 alloys were investigated through stress-free thermal cycling, constant-stress thermal cycling and constant-temperature stress cycling experiments. The alloys showed reversible phase transformations above 180 °C, which makes them suitable for high temperature shape memory applications ...
ACAR, EMRE, Karaca, Haluk E., Toker, Guher P., Kurkcu, Harun   +3 more
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TiAu and TiPt high temperature shape memory alloys

Proceedings of 2014 11th International Bhurban Conference on Applied Sciences & Technology (IBCAST) Islamabad, Pakistan, 14th - 18th January, 2014, 2014
Equiatomic TiAu and TiPt exhibit thermo-elastic martensitic phase transformation at high temperature. Phase transformation temperatures of TiPt (Af=1057°C) are about 400°C higher than TiAu (Af=624°C). However TiAu and TiPt exhibit partial shape memory effect and very low strength (e.g. ~120MPa for TiAu and ~20MPa for TiPt) in B2 phase region.
Abdul Wadood, Yoko Yamabe-Mitarai
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The superelasticity of TiPdNi high temperature shape memory alloy

Intermetallics, 2003
Abstract In the high temperature shape memory alloy (HTSMA) Ti 51 Pd 30 Ni 19 , superelasticity is found for the first time and the superelasticity is quite different from that of NiTi or CuZnAl. The recoverable superelastic strain is 7% without failure of the specimen.
Jiansheng Wu, Qingchao Tian
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Quaternary alloying of copper with Ti50Ni25Pd25 high temperature shape memory alloys

Materials Science and Engineering: A, 2019
Abstract High temperature shape memory alloys with four different compositions i.e. Ti50Ni25-xPd25Cux (x = 0, 5, 10, 15 at.%) were developed, characterized and tested for mechanical and shape memory properties. For simplicity, the alloys were named as 0Cu, 5Cu, 10Cu and 15Cu alloys depending upon the concentration of Cu. Addition of Cu in place of Ni
Saif ur Rehman, Mushtaq Khan, A. Nusair Khan, Liaqat Ali, Syed Imran Husain Jaffery, Muhammad Khurram   +5 more
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Diffraction Investigations of High Temperature Shape Memory Alloys

2013
Shape memory alloys are intermetallic materials with a unique ability to revert to a predefined physical shape by virtue of diffusionless transformations. Recent interest by aerospace and automotive industries to exploit the functionalities of these materials in future energy efficient designs has renewed scientific research in this field. However, the
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The substructures of martensite in a TiNiHf10 high temperature shape memory alloy

Materials Letters, 2006
Abstract The martensite of a TiNiHf 10 alloy has been determined to possess a monoclinic crystal lattice structure with lattice parameters of a  = 0.289 nm, b  = 0.408 nm, c  = 0.468 nm and β  = 98.9°. The (001) compound twins are found to be the substructures of the TiNiHf 10 alloy and the [011] type II twin is found to be one kind of ...
Q. Wei, X.D. Han, Z. Zhang
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