Strain glass and stress-induced martensitic transformation characteristics of Ti40Zr10Ni40Co5Cu5 multi-principal element alloy

The Ti40Zr10Ni40Co5Cu5 multi-principal element alloy has been demonstrated to be a strain glass alloy. It did not undergo martensitic transformation and retained a B2 structure even when the temperature was decreased to 15 K. Dynamic mechanical tests showed that its responses (elastic modulus and ta...

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Bibliographic Details
Published in:Scripta materialia 2020-09, Vol.186, p.127-131
Main Authors: Chen, Chih-Hsuan, Lu, Nian-Hu, Shen, Jia-Jyun, Chen, Yue-Jin
Format: Article
Language:English
Subjects:
Dynamic mechanical analysis
Point defects
Shape memory alloys (SMA)
Strain glass
X-ray diffraction (XRD)
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Summary:The Ti40Zr10Ni40Co5Cu5 multi-principal element alloy has been demonstrated to be a strain glass alloy. It did not undergo martensitic transformation and retained a B2 structure even when the temperature was decreased to 15 K. Dynamic mechanical tests showed that its responses (elastic modulus and tan δ value) were frequency-dependent, with an ideal freezing temperature of 216.1 K. The Ti40Zr10Ni40Co5Cu5 alloy is a B19’ strain glass with recoverable strain of 4.4% and elastocaloric cooling of 14.8 K when tested at 233 K. Adding multiple alloying elements is an effective way to suppress martensitic transformation and design novel strain glass alloys. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2020.04.026