Engineering twins and stacking faults of Co-Al-W shape memory alloy by a combination of casting and solution-treatment

2019 ◽  
Vol 171 ◽  
pp. 73-77 ◽  
Author(s):  
D. Wang ◽  
X. Yang ◽  
Q. Liao ◽  
S.L. Wang ◽  
H.B. Peng ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Stacking Faults ◽  
Solution Treatment

Effect of laser solution-treatment on a Ti-based shape memory alloy

2017 ◽  
Vol 90 ◽  
pp. 41-46 ◽  
Author(s):  
Hiroyuki Tada ◽  
Hiroshi Nakamura ◽  
Takahisa Shobu ◽  
Ryuhei Kitai ◽  
Ken-ichiro Kikuta ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Solution Treatment

Effect of Heat Treatment Condition on Texture in Ti-Mo-Al-Zr Shape Memory Alloy

2014 ◽  
Vol 922 ◽  
pp. 622-625 ◽  
Author(s):  
Tomoya Sasaki ◽  
Katsunori Hiramatsu ◽  
Masaki Tahara ◽  
Hideki Hosoda ◽  
Shuichi Miyazaki ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Treatment Condition ◽  
Recrystallization Texture ◽  
Reduction Rate ◽  
Solution Treatment ◽  
Heat Treatment Condition ◽  
X Ray ◽  
Α Phase ◽  
Zr Alloy

Effect of solution-treatment condition on texture of a Ti-Mo-Al-Zr shape memory alloy was investigated by X-ray pole figure measurement. Ti-Mo-Al-Zr alloy is a Ni-free and β-Ti based biomedical shape memory alloy. Unlike Ti-Nb system alloys, {110}β<001>βrecrystallization texture was developed by the solution-treatment above β-transus as the reduction rate increases. However, this texture disappeared by the solution-treatment below β-transus and {531}β<134>βrecrystallization texture was strongly developed. It was found that precipitation of hcp α phase has a significant effect on recrystallization texture in this alloy.

scholarly journals Effect of Solution Treatment on the Shape Memory Functions of (TiZrHf)50Ni25Co10Cu15 High Entropy Shape Memory Alloy

Entropy ◽  
2019 ◽  
Vol 21 (10) ◽  
pp. 1027 ◽  
Author(s):  
Hao-Chen Lee ◽  
Yue-Jin Chen ◽  
Chih-Hsuan Chen
Keyword(s):  
Martensitic Transformation ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Lattice Distortion ◽  
Functional Performance ◽  
Solution Treatment ◽  
Memory Functions ◽  
High Entropy ◽  
The Matrix ◽  
Entropy Effect

This study investigated the effects of solution treatment at 1000 °C on the transformation behaviors, microstructure, and shape memory functions of a novel (TiZrHf)50Ni25Co10Cu15 high entropy shape memory alloy (HESMA). The solution treatment caused partial dissolution of non-oxygen-stabilized Ti2Ni-like phase. This phenomenon resulted in the increment of (Ti, Zr, Hf) content in the matrix and thus increment of the Ms and Af temperatures. At the same time, the solution treatment induced a high entropy effect and thus increased the degree of lattice distortion, which led to increment of the friction force during martensitic transformation, resulting in a broad transformation temperature range. The dissolution of the Ti2Ni-like phase also improved the functional performance of the HESMA by reducing its brittleness and increasing its strength. The experimental results presented in this study demonstrate that solution treatment is an effective and essential way to improve the functional performance of the HESMA.

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