Tension-Compression Asymmetry of Superelasticity in Unidirectionally Solidified Cu-Al-Mn Shape Memory Alloy

被引：5

作者：

Liu, Jili ^{[1
]}

Yan, Wangxian ^{[1
]}

Li, Mohan ^{[1
]}

机构：

[1] Wuhan Univ Technol, Hubei Key Lab Theory & Applicat Adv Mat Mech, Wuhan 430070, Peoples R China

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2020年 / 29卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Cu-Al-Mn; shape memory alloy; superelasticity; tension-compression asymmetry; unidirectional solidification; ANISOTROPY; TRANSFORMATIONS; TEXTURE;

D O I：

10.1007/s11665-020-04588-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The unidirectionally solidified Cu-Al-Mn shape memory alloy with strong -oriented texture along the solidification direction and high length-diameter ratio columnar-grained structure exhibits excellent superelastic properties compared to the Ni-Ti alloys. In this paper, the tension-compression asymmetry of unidirectionally solidified Cu71Al18Mn11 alloy was researched by the geometrically nonlinear theory and superelastic experiments. The results show that the tension-compression asymmetry of the alloy has a significant anisotropy. The theoretical asymmetry ratio of transformation strain along reaches 14.2%, which is larger than other orientations. The tension and compression superelastic experiment research of unidirectionally solidified Cu71Al18Mn11 SMA along the direction parallel ( grain orientation) or perpendicular (- grain orientation) to the solidification direction indicates that their superelastic strain, transformation strain, elastic modulus, transformation platform slope, and critical stress have obvious tension-compression asymmetry.

引用

页码：289 / 295

页数：7