Tuning microstructure, transformation behavior, mechanical/functional properties of Ti-V-Al shape memory alloy by doping quaternary rare earth Y

被引：26

作者：

Yi, Xiaoyang ^{[1
]}

Sun, Kuishan ^{[2
]}

Wang, Haizhen ^{[1
]}

Gong, Yifu ^{[2
]}

Meng, Xianglong ^{[2
]}

Gao, Zhiyong ^{[2
]}

Zhang, Hua ^{[3
]}

Cai, Wei ^{[2
]}

机构：

[1] Yantai Univ, Coll Nucl Equipment & Nucl Engn, Yantai 264005, Peoples R China

[2] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

[3] Yantai Univ, Inst Adv Studies Precis Mat, Yantai 264005, Peoples R China

来源：

PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL | 2021年 / 31卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Light weight shape memory alloy; Ti?V?Al alloy; Microstructure; Phase transformation; Mechanical properties; MARTENSITIC-TRANSFORMATION; MECHANICAL-PROPERTIES; METALLURGY; HF;

D O I：

10.1016/j.pnsc.2020.12.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure features, martensitic transformation behavior and mechanical/functional properties of Ti?V?Al alloy were tailored by changing rare element Y content in the present investigation. The results showed that Y doping resulted in the grain refinement and formation of Y-rich phase mainly distributing along grain boundary in Ti?V?Al alloys. The martensitic transformation temperatures of Ti?V?Al alloys slightly increased due to the variation of matrix composition induced by the presence of Y-rich phase. The mechanical and functional properties of Ti?V?Al alloys doped moderate Y addition were significantly improved, which can be ascribed to grain refinement, solution strengthening and precipitation strengthening. The 1.0 at.%Y-doped Ti?V?Al alloy exhibited the highest ultimate tensile stress of 912 MPa and largest elongation of 17.68%. In addition, it was found that the maximum recoverable strain of 5.42% can be obtained in Ti?V?Al alloy with adding 1.0 at.%Y, under the pre-strain of 6% condition, which is enhanced by approximate 0.6% than that of Ti?V?Al alloy without Y addition.

引用

页码：296 / 302

页数：7

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