Effect of Ti and Nb Contents on Microstructure and Mechanical Properties of HfZrVTaMoWTixNby Refractory High-Entropy Alloys

被引：21

作者：

Yao, Hongwei ^{[1
]}

Miao, Junwei ^{[1
]}

Liu, Yongmiao ^{[1
]}

Guo, Enyu ^{[1
,2
]}

Huang, He ^{[3
]}

Lu, Yiping ^{[1
,2
]}

Wang, Tongmin ^{[1
,2
]}

Li, Tingju ^{[1
,2
]}

机构：

[1] Dalian Univ Technol, Sch Mat Sci & Engn, Key Lab Solidificat Control & Digital Preparat Te, Dalian 116024, Peoples R China

[2] Dalian Univ Technol, Ningbo Inst, New Mat Innovat Ctr, Ningbo 315000, Peoples R China

[3] China Acad Engn Phys, Inst Mat, Mianyang 621907, Sichuan, Peoples R China

来源：

ADVANCED ENGINEERING MATERIALS | 2021年 / 23卷 / 08期

基金：

中国国家自然科学基金;

关键词：

laves phases; mechanical properties; microstructure; refractory high-entropy alloys; SUPERALLOYS;

D O I：

10.1002/adem.202100225

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Refractory high-entropy alloys (RHEAs) with excellent high-temperature performance are attractive for high-temperature structural applications. However, many RHEAs suffer from high density and poor room temperature (RT) malleability. Herein, the effects of Ti and Nb contents on the phase equilibrium and mechanical properties of HfZrVTaMoWTixNby RHEAs are studied to achieve unique balanced properties in a wide temperature range. With the increase of Ti or Nb content, the Laves phase precipitation is suppressed and RT malleability is improved. Particularly, the HfZrVTaMoWTi2Nb2 RHEA without Laves precipitates exhibits a high yield strength of 1.7 GPa and a compressive strain of similar to 30% at RT. Moreover, it retains a high systemic yield strength of 31 MPa cm(3) g(-1) at 1200 degrees C, which is nearly three times that of HfZrTaTiNb and nearly equal to that of MoWTaNb, suggesting its potential applicability at elevated temperatures.

引用

页数：7

共 22 条

[1] Microstructural development in equiatomic multicomponent alloys [J].