Effect of Cu addition on the high temperature shape memory properties of Ti50Ni25Pd25 alloy

2013 ◽  
Vol 577 ◽  
pp. S383-S387 ◽  
Author(s):  
Imran M. Khan ◽  
Hee Young Kim ◽  
Tae-hyun Nam ◽  
Shuichi Miyazaki
Keyword(s):  
High Temperature ◽  
Shape Memory ◽  
Shape Memory Properties

Transformation Temperatures, Shape Memory and Magnetic Properties of Hafnium Modified Ti-Ta Based High Temperature Shape Memory Alloys

2017 ◽  
Vol 36 (2) ◽  
pp. 113-119
Author(s):  
W.Q. Khan ◽  
Q. Wang ◽  
X. Jin
Keyword(s):  
High Temperature ◽  
Shape Memory ◽  
Alloy System ◽  
Heat Of Reaction ◽  
Transformation Temperatures ◽  
Dsc Measurements ◽  
Recovery Strain ◽  
Shape Memory Properties ◽  
Three Point Bend Test ◽  
Point Bend

AbstractIn this study the modification effect of Hf content on the shape memory properties and magnetic permeability of a 75.5-77Ti-20Ta-3-4.5Hf alloy system has been systematically studied by DSC, three-point bend test, vector network analyzer and XRD. The martensitic transformation temperature, heat of reaction and recovery strain increases with the increase of hafnium and tantalum content. A stable high temperature shape memory effect was observed (Ms = 385–390 °C) during the two thermal cycles between 20 °C and 725 °C. Transformation temperatures and heats of reaction were determined by DSC measurements. Recovery strain was determined by three-point bend testing. Also an alloy, 70Ti-26Ta-4Hf, with higher tantalum content was produced to observe the effect of Ta on the shape memory properties. Permeability increases gradually from 1.671 to 1.919 with increasing content of hafnium modification and remains stable in the frequency range of 450 MHz to 1 GHz.

Effect of the Addition of Gd on Ni53Mn22Co6Ga19 High-Temperature Shape Memory Alloy

2010 ◽  
Vol 654-656 ◽  
pp. 2095-2098
Author(s):  
Yun Qing Ma ◽  
Shui Yuan Yang ◽  
San Li Lai ◽  
Shi Wen Tian ◽  
Cui Ping Wang ◽  
...  
Keyword(s):  
Grain Size ◽  
High Temperature ◽  
Martensitic Transformation ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Earth Element ◽  
Stress And Strain ◽  
Martensitic Transformation Temperature ◽  
Rich Phase ◽  
Shape Memory Properties

The rare earth element Gd is added to Ni53Mn22Co6Ga19 high-temperature shape memory alloy to refine the grain size and adjust the distribution of γ phase, and their microstructure, martensitic transformation behaviors, mechanical and shape memory properties were investigated. The results show that the grain size is obviously decreased and the γ phase tends to segregate at grain boundaries with increasing Gd content. Small amounts of Gd-rich phase were formed with 0.1 at.% Gd addition. The martensitic transformation temperature abruptly increases with 0.1 at.% Gd addition, then almost keeps constant with further increasing Gd content. The addition of 0.1 at.% Gd is proved to be beneficial to both tensile stress and strain before fracture, but negative to the shape-memory effect.

Effect of Hf/Zr Ratio on Shape Memory Properties of High Temperature Ni50.3Ti29.7(Hf,Zr)20 Alloys

2021 ◽  
Vol 194 ◽  
pp. 113623
Author(s):  
G.S. Bigelow ◽  
O. Benafan ◽  
A. Garg ◽  
R.D. Noebe
Keyword(s):  
High Temperature ◽  
Shape Memory ◽  
Shape Memory Properties

scholarly journals FCC/HCP Martensitic Transformation and High-Temperature Shape Memory Properties in Co-Si Alloys

2006 ◽  
Vol 47 (9) ◽  
pp. 2377-2380 ◽  
Author(s):  
Toshihiro Omori ◽  
Wataru Ito ◽  
Keisuke Ando ◽  
Katsunari Oikawa ◽  
Ryosuke Kainuma ◽  
...  
Keyword(s):  
High Temperature ◽  
Martensitic Transformation ◽  
Shape Memory ◽  
Shape Memory Properties

209 Shape Memory Properties of TiAu High Temperature Shape Memory Alloys

2006 ◽  
Vol 2006 (0) ◽  
pp. 75-76
Author(s):  
Hideki HOSODA ◽  
Toshiyuki KAWAMURA ◽  
Tomonari INAMURA ◽  
Kenji WAKASHIMA ◽  
Shuichi MIYAZAKI
Keyword(s):  
High Temperature ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Shape Memory Properties

Recent Developments in High Temperature Shape Memory Alloys

1994 ◽  
Vol 360 ◽  
Author(s):  
Jeno Beyer ◽  
Jan.H. Mulder
Keyword(s):  
High Temperature ◽  
Research And Development ◽  
Shape Memory Alloys ◽  
Time Dependence ◽  
Shape Memory ◽  
Medical Applications ◽  
Space Technology ◽  
Shape Memory Properties ◽  
Recent Developments ◽  
Number Of Cycles

AbstractThe functional properties of Shape Memory Alloys (SMA's) are used succesfully at present in a variety of industrial and medical applications. The use of these materials in smart structures is now emerging in the field of aeronautic/space technology. Many applications require higher operating temperatures than available to date, or higher cooling rates and/or a higher number of cycles. For this purpose the properties and fabricability of commercial alloys as Ni-Ti-(X), Cu-Al-Ni or Cu-Zn-Al are being adjusted and improved. Other feasible alloys are being developed. The research and development is directed towards the control of the stress, strain, temperature and time dependence of shape memory properties for a stable in-service behaviour. In this paper the various approaches taken up in recent years by academic and industrial laboratories for developing high temperature SMA's are reviewed.

A Study on Shape Memory Performance of Cu-Al-Ni-Be Alloy Single Crystal

2011 ◽  
Vol 287-290 ◽  
pp. 21-25
Author(s):  
Hua Ping Xu ◽  
Gao Feng Song ◽  
Xie Min Mao
Keyword(s):  
High Temperature ◽  
Temperature Gradient ◽  
Shape Memory Alloy ◽  
Single Crystal ◽  
Shape Memory ◽  
Directional Solidification ◽  
Memory Performance ◽  
Copper Base ◽  
Shape Memory Properties ◽  
Solidification Furnace

In this paper, single crystal of CuAlNiBe quaternary shape memory alloy was prepared in a high temperature gradient directional solidification furnace with a selective growing crystallizer. And its shape memory performance characters were systematically compared with other series copper base shape memory alloys. The results show that the single crystal of CuAlNiBe quaternary shape memory alloy has better shape memory properties.

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