Structure design of high-performance Cu-based shape memory alloys

被引：48

作者：

Xie, Jian-Xin ^{[1
,2
]}

Liu, Ji-Li ^{[1
]}

Huang, Hai-You ^{[2
]}

机构：

[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

[2] Beijing Lab Metall Mat & Proc Modern Transportat, Beijing 100083, Peoples R China

来源：

RARE METALS | 2015年 / 34卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Cu-based shape memory alloy; Superelasticity; Cu-Al-Mn; Structure design; Texture; Grain boundary; MECHANICAL-PROPERTIES; GRAIN-BOUNDARY; MARTENSITIC-TRANSFORMATION; ELASTIC-CONSTANTS; FATIGUE BEHAVIOR; DEFORMATION; STRESS; TEXTURE; SIZE; SUPERELASTICITY;

D O I：

10.1007/s12598-015-0557-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of various structure factors on the properties (superelasticity mainly) of Cu-based shape memory alloys (SMAs) were systematically evaluated in this review article through literatures combining with our work. It is concluded that besides the decisive role of grain orientation, the grain boundary (GB) characteristics also play important roles in the superelasticity, which include GB area, GB type, GB morphology and GB direction in descending order of the effect significance. According to the above results, the prior principles of structure design are proposed for high-performance Cu-based SMAs from most to least important: (1) obtaining grain orientation with high phase transformation strain; (2) increasing grain size or reducing GB area; (3) obtaining straight low-energy GBs, especially low-angle GBs; (4) trying to make GB direction parallel to external stress. Consistent with the main or all principles, the bamboo-like-grained and columnar-grained (CG) Cu-based SMAs show excellent comprehensive properties.

引用

页码：607 / 624

页数：18

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