Microstructure and Mechanical Properties of TaNbVTiAlx Refractory High-Entropy Alloys

被引：24

作者：

Xiang, Li ^{[1
]}

Guo, Wenmin ^{[1
]}

Liu, Bin ^{[1
]}

Fu, Ao ^{[1
]}

Li, Jianbo ^{[2
]}

Fang, Qihong ^{[3
]}

Liu, Yong ^{[1
]}

机构：

[1] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China

[2] Chongqing Univ, Sch Mat Sci & Engn, Chongqing 400044, Peoples R China

[3] Hunan Univ, Coll Mech & Vehicle Engn, Changsha 410082, Peoples R China

来源：

ENTROPY | 2020年 / 22卷 / 03期

基金：

中国国家自然科学基金; 湖南省自然科学基金;

关键词：

high-entropy alloy; refractory alloy; powder metallurgy; specific strength; ductile; SOLID-SOLUTION PHASE; DESIGN; DEFORMATION; STABILITY; ELEMENTS; HEAT;

D O I：

10.3390/e22030282

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A series of TaNbVTiAlx (x = 0, 0.2, 0.4, 0.6, 0.8, and 1.0) refractory high-entropy alloys (RHEAs) with high specific strength and reasonable plasticity were prepared using powder metallurgy (P/M) technology. This paper studied their microstructure and compression properties. The results show that all the TaNbVTiAlx RHEAs exhibited a single BCC solid solution microstructure with no elemental segregation. The P/M TaNbVTiAlx RHEAs showed excellent room-temperature specific strength (207.11 MPa*cm(3)/g) and high-temperature specific strength (88.37 MPa*cm(3)/g at 900 degrees C and 16.03 MPa*cm(3)/g at 1200 degrees C), with reasonable plasticity, suggesting that these RHEAs have potential to be applied at temperatures >1200 degrees C. The reasons for the excellent mechanical properties of P/M TaNbVTiAl0.2 RHEA were the uniform microstructure and solid solution strengthening effect.

引用

页数：13

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