Transactions of Materials and Heat Treatment

Title：Thermal transient phase transformation and deformation behavior of NiTi shape memory alloy

Authors： Du Hongfei Xiao Yao Zeng Pan Lei Liping Hei Meng

Unit： Tsinghua University

KeyWords： NiTi shape memory alloy thermal transient phase transformation deformation behavior

ClassificationCode：

year,vol(issue):pagenumber：2015,40(7):120-126

Abstract：

The thermal transient behavior of NiTi memory alloy was studied by using the thermal-mechanical circulation experiment of material and digital image correlation (DIC) measurement system and the thermal transient behaviors were successfully got under different constant stress levels and temperature variation rates. Based on the experimental results, the reason and law of evolution for martensite deformation band，and the relation between critical phase transition stress and temperature during martensite transformation induced by temperature were systematically analyzed. It is revealed that the thermal transient phase transformation and deformation evolution of NiTi shape memory alloy have close relations with the stress state and temperature variation rate，which provides important information for multi scale finite element simulation during thermal transient process for NiTi shape memory alloy.

Funds：

国家自然科学基金资助项目(51275270)

杜泓飞（1986-），男，博士研究生

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