Influence of the microstructure on the stability of the intrinsic two-way shape memory effect

被引：36

作者：

Scherngell, H ^{[1
]}

Kneissl, AC ^{[1
]}

机构：

[1] Univ Leoben, Inst Phys Met & Mat Testing, A-8700 Leoben, Austria

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1999年 / 273卷

关键词：

martensite; two-way shape memory effect; Ni-Ti; microstructure; thermomechanical training;

D O I：

10.1016/S0921-5093(99)00306-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This work presents a study of the development of the two-way shape memory effect (TWSME) and its degradation due to working cycles. An intrinsic TWSME was induced in wire specimens of two near equiatomic NiTi alloys by thermomechanical training. The development of the effect was analyzed and discussed with respect to the different microstructures obtained by preliminary heat-treatment of the samples. The investigations show that training of cold worked specimens results in a smaller extension of the TWSME, but the effect remains more stable during service cycles compared to annealed samples. Precipitates have a strong negative effect on the trainability of the alloy. They considerably impede the evolution of the recoverable strain, thus limiting the obtainable magnitude of the two-way strain. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：400 / 403

页数：4

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