Effect of pseudoelastic cycling on the Clausius-Clapeyron relation for stress-induced martensitic transformation in NiTi

被引：64
|
作者：
Liu, Yinong [1 ]
Mahmud, Abdus [1 ]
Kursawe, Fabian [1 ]
Nam, Tae-Hyun [2 ,3 ]
机构：
[1] Univ Western Australia, Sch Mech Engn, Crawley, WA 6009, Australia
[2] Gyeongsang Natl Univ, Div Mat Engn, Jinju, South Korea
[3] Gyeongsang Natl Univ, Engn Res Inst, Jinju, South Korea
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 449卷 / 1-2期
关键词：
shape memory alloys; NiTi; Clausius-Clapeyron relation; martensitic transformation; pseudoelasticity;
D O I：
10.1016/j.jallcom.2006.02.080
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
This study evaluates the strain-dependence of Clausius-Clapeyron relation of the stress-induced martensitic transformation in a Ti-50.8 at.% Ni. The transformation strain is altered by means of pseudoelastic cycling. It is found that the sigma-T linearity coefficient of the relation is greater for the reverse transformation than for the forward transformation, consistent with the smaller transformation strain of the reverse transformation, and that the coefficient increases with mechanical cycling, resulting from decreases of the transformation strains caused by the mechanical cycling. The thermodynamic analysis indicates that the reduction in transformation strain with cycling is caused partially by a reduction in the transformation volume and partially by a reduction in the degree of orientation of the martensite variant. (C) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：82 / 87
页数：6
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