Analysis of Thermo-Mechanical Behavior of Shape Memory Alloys

Abstract:

Shape Memory Alloy (SMA) is widely used and plays an important role in various engineering fields due to its special characteristics of shape memory effect and super-elasticity. In this paper the phase transformation behavior and thermo-mechanics behavior of 50.0at%Ni-Ti SMA are investigated though differential scanning colorimeter (DSC) and tensional tests respectively. Optical micrographs show the transformation of austenite and twinned martensite. The comparing numerical calculation result with tensional test result shows the new macro-mechanical constitutive equation can express the thermo-mechanical behavior of SMA effectively.

• Periodical: Key Engineering Materials (Volumes 452-453)
• Pages: 149-152
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.452-453.149
• Online since: November 2010
• Authors: Hong Shuai Lei, Zhen Qing Wang, Bo Zhou, Yu Long Wang
• Keywords: Numerical Calculation, Phase Transformation Model, Shape Memory Alloy Actuator, Thermo-Mechanical Constitutive Behavior

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