Improvement of the stability of superelasticity and elastocaloric effect of a Ni-rich Ti-Ni alloy by precipitation and grain refinement

• Published in: Scripta materialia Vol. 162; pp. 230 - 234
• Main Authors: Chen, Hong, Xiao, Fei, Liang, Xiao, Li, Zhenxing, Li, Zhu, Jin, Xuejun, Min, Na, Fukuda, Takashi
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15.03.2019
• Subjects: Elastocaloric effect; Shape memory alloys; Superelasticity; Thermomechanical treatment; Ti-Ni; Ti-Ni; Shape memory alloys; Superelasticity; Elastocaloric effect; Thermomechanical treatment

In this paper, we report that the superelasticity and the elastocaloric effect of Ti-50.8Ni (at.%) alloy are drastically improved by a combination of precipitation and grain refinement strengthening. The process is as follows: first, aging at 773 K after solution treatment to form coherent fine prec...