Effect of Y on Martensitic Transformation and Mechanical Properties of NiMnSn High Temperature Shape Memory Alloy

被引：0

作者：

Li Kemeng ^{[1
]}

Chen Feng ^{[1
]}

Tong Yunxiang ^{[1
]}

Li Li ^{[1
]}

Zheng Yufeng ^{[2
]}

机构：

[1] Harbin Engn Univ, Harbin 150001, Peoples R China

[2] Peking Univ, Beijing 100871, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2013年 / 42卷

关键词：

Ni-Mn-Sn alloy; high temperature shape memory alloys; rare earth; martensitic transformation; BEHAVIOR;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of rare earth element Y addition on the microstructure, martensitic transformation, room temperature mechanical properties and shape memory effect of Ni50Mn42Sn8 high temperature shape memory alloy were studied by means of optical microscope, SEM, DSC, and compression tests etc. The results show that the doping of Y considerably refines the grains, and the microstructure of NiMnSn alloys consists of the matrix and Y-riched second phase which distributes along the grain boundary. High temperature annealing leads to the chemical homogeneity which makes the alloys undergo a single-stage thermalelastic martensitic transformation and reverse transformation. With the increase of Y content, all transformation temperatures are shifted to high temperature. Compression tests indicate that, a proper addition of Y remarkably improves the mechanical properties, Meanwhile, a given magnitude of shape memory effect is obtained.

引用

页码：370 / 374

页数：5

共 14 条

[1] CRYSTAL-STRUCTURE OF THE X-PHASE IN GRAIN-REFINED CU-AL-NI-TI SHAPE MEMORY ALLOYS [J].