Phase Transformation and Mechanical Properties of Ti44Ni47Nb9 Alloy after High-velocity Impact

被引：0

作者：

Zhu Yingying ^{[1
]}

Wang Haizhen ^{[1
]}

Wen Guangyuan ^{[1
]}

Gao Zhiyong ^{[1
]}

Cai Wei ^{[1
]}

机构：

[1] Harbin Inst Technol, Harbin 150001, Heilongjiang, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2018年 / 47卷 / 01期

关键词：

Ti44Ni47Nb9; alloy; high-velocity impact; phase transformation; microstructure; mechanical properties; MICROSTRUCTURE; BEHAVIOR;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Aiming at the urgent demand for reliability assessment of TiNi based alloy working in space, Ti44Ni47Nb9 alloy was impacted at 1020 m/s using a powder gun. Phase transformation, microstructure and mechanical properties of Ti44Ni47Nb9 alloy induced by impact were investigated. The results show that no intermediate phase is formed along the impact direction. The phase transformation temperature shifts to a lower temperature along 45 degrees and vertical to the impact direction of impacted Ti44Ni47Nb9 alloy. A large number of cracks appear at the bottom of the crater and walls, there are martensite plates in TiNi matrix, and many dislocations exist in the beta-Nb particles and TiNi matrix. The microhardness declines gradually with the increase in distance from the crate, which is attributed to working hardening and uneven energy distribution caused by high-velocity impact.

引用

页码：317 / 320

页数：4

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