Mechanical Properties and the Microstructure of Ni-Ti Alloy at High Strain Rate

被引：0

作者：

Yang Shengnan ^{[1
]}

Yang Suyuan ^{[1
]}

Zhang Xiao ^{[1
]}

Wu Qiong ^{[1
]}

机构：

[1] Beijing Inst Technol, Natl Key Lab Sci & Technol Mat Shock & Impact, Beijing 100081, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2016年 / 45卷 / 11期

关键词：

Ni-Ti alloy; SIM (stress induced martensite); high strain rate; microstructure; SHAPE-MEMORY ALLOY;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Quasi-static and dynamic mechanical properties of Ni-Ti shape memory alloy bars were investigated by an electronic universal testing machine (INSTRON5985) and Split-Hopkinson Pressure Bar (SHPB), and the microstructure in different conditions was analyzed by microscopic analysis methods, including XRD, OM and SEM. The results show that the Ni-Ti alloy original microstructure consists of B2 austenitic phase, B19' martensite phase and Ni4Ti3 phase with small equiaxed grains; stress induced martensite (SIM) phase transformation occurs during quasi-static and dynamic compression; however, the dynamic compression stress-strain curve show a strain rate hardening effect rather than a yield platform; within a certain range of strain rate, the striped microstructure increases with the increase of strain rate, and the SIM phase transformation expands.

引用

页码：2847 / 2850

页数：4

共 9 条

[1] Compressive superelastic behavior of a NiTi shape memory alloy at strain rates of 0.001-750 s-1 [J].