Improvement of Mechanical and Shape Memory Properties of Ti-50Pt High Temperature Shape Memory Alloys by Addition of Group IV Elements

2013 ◽  
pp. 949-958 ◽  
Author(s):  
A. Wadood ◽  
M. Takahashi ◽  
S. Takahashi ◽  
H. Hosoda ◽  
Y. Yamabe-Mitarai
Keyword(s):  
High Temperature ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Group Iv ◽  
Shape Memory Properties ◽  
Group Iv Elements

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.

scholarly journals Effect of Stoichiometry on Shape Memory Properties and Functional Stability of Ti–Ni–Pd Alloys

Materials ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 798 ◽  
Author(s):  
Yuki Hattori ◽  
Takahiro Taguchi ◽  
Hee Kim ◽  
Shuichi Miyazaki
Keyword(s):  
High Temperature ◽  
Martensitic Transformation ◽  
Shape Memory Alloys ◽  
Thermal Cycling ◽  
Shape Memory ◽  
Stoichiometric Composition ◽  
Atomic Ratio ◽  
Transformation Temperatures ◽  
Shape Memory Properties ◽  
Ti Content

Ti–Ni–Pd shape memory alloys are promising candidates for high-temperature actuators operating at above 373 K. One of the key issues in developing high-temperature shape memory alloys is the degradation of shape memory properties and dimensional stabilities because plastic deformation becomes more pronounced at higher working temperature ranges. In this study, the effect of the Ti:(Ni + Pd) atomic ratio in TixNi70−xPd30 alloys with Ti content in the range from 49 at.% to 52 at.% on the martensitic transformation temperatures, microstructures and shape memory properties during thermal cycling under constant stresses were investigated. The martensitic transformation temperatures decreased with increasing or decreasing Ti content from the stoichiometric composition. In both Ti-rich and Ti-lean alloys, the transformation temperatures decreased during thermal cycling and the degree of decrease in the transformation temperatures became more pronounced as the composition of the alloy departed from the stoichiometric composition. Ti2Pd and P phases were formed during thermal cycling in Ti-rich and Ti-lean alloys, respectively. Both Ti-rich and Ti-lean alloys exhibited superior dimensional stabilities and excellent shape memory properties with higher recovery ratio and larger work output during thermal cycling under constant stresses when compared with the alloys with near-stoichiometric composition.

The ductility and shape-memory properties of Ni–Mn–Co–Ga high-temperature shape-memory alloys

2009 ◽  
Vol 57 (11) ◽  
pp. 3232-3241 ◽  
Author(s):  
Yunqing Ma ◽  
Shuiyuan Yang ◽  
Yong Liu ◽  
Xingjun Liu
Keyword(s):  
High Temperature ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Shape Memory Properties

Cold workability and shape memory properties of novel Ti–Ni–Hf–Nb high-temperature shape memory alloys

2011 ◽  
Vol 65 (9) ◽  
pp. 846-849 ◽  
Author(s):  
Hee Young Kim ◽  
Takafumi Jinguu ◽  
Tae-hyun Nam ◽  
Shuichi Miyazaki
Keyword(s):  
High Temperature ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Shape Memory Properties ◽  
Cold Workability

Advances in Ti-Based Systems as High Temperature Shape Memory Alloys

2018 ◽  
Vol 770 ◽  
pp. 230-238 ◽  
Author(s):  
Hasani Chauke ◽  
Mordecai Mashamaite ◽  
Rosinah Modiba ◽  
Phuti Ngoepe
Keyword(s):  
High Temperature ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Lattice Constants ◽  
Good Shape ◽  
Potential Shape ◽  
Shape Memory Properties ◽  
Different Temperatures ◽  
Diffraction Patterns ◽  
Experimental Values

In this study, we investigate the effect of ternary addition on the structural, mechanical properties and temperature dependence of Ti-based as potential shape memory alloys using molecular dynamics approach. We found that binary Ti-Pt alloys exhibit shape memory properties and display possible martensitic transformation from B2 to B19 phases. Partial addition with Zr, Co, Pd, Ir showed preferential ternary high temperature shape memory alloys formation of 6.25 at. % X composition (Ti-Pt-X). We found that the equilibrium lattice constants are in better agreement with the available experimental values. The heats of formation and elastic properties reveal possible composition and phases at temperature above 900 K with good shape memory properties. Their structures were confirmed using the X-ray diffraction patterns at different temperatures.

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