Experimental Investigation on Rate Dependence of Thermomechanical Response in Superelastic NiTi Shape Memory Alloy

被引：25
|
作者：
Xiao, Yao [1 ]
Zeng, Pan [1 ]
Lei, Liping [1 ]
Du, Hongfei [1 ]
机构：
[1] Tsinghua Univ, Dept Mech Engn, Beijing 100084, Peoples R China
来源：
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2015年 / 24卷 / 10期
基金：
中国国家自然科学基金;
关键词：
digital image correlation; phase transformation; shape memory alloy; superelasticity; DIGITAL IMAGE CORRELATION; PHASE-TRANSFORMATION FRONTS; EVOLUTION; STRESS; DOMAIN; MODEL;
D O I：
10.1007/s11665-015-1688-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, we focus on thermomechanical response of superelastic NiTi SMA at different strain rates under uniaxial loading. In situ digital image correlation method is applied to measure the local strain of the specimen. The evolution of the transformation bands is tracked by a CCD camera and the temperature field is recorded by an infrared camera. We show that there exists a strong link among strain rate, average temperature evolution, and the mechanical behavior of the material. It is also observed in the experiments that with the increase in strain rate, the deformation modes of the material transform from localization modes to homogenous modes.
引用
收藏
页码：3755 / 3760
页数：6
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