Microstructure Recrystallization and Mechanical Properties of a Cold-Rolled TiNbZrTaHf Refractory High-Entropy Alloy

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外文摘要：The equiatomic TiNbZrTaHf alloy was successfully rolled at room temperature with the reduction of～85％.The microstruc-ture and tensile properties were investigated after cold working and annealing.It was determined that the recrystallization temperature of the TiNbZrTaHf alloy between 850 and 900 ℃.Complete recrystallization and normal grain growth occurred,the high stability of single phase was maintained after annealing at 1000,1200,and 1400 ℃.But the precipitated phase appeared after long term annealing,as seen after 500 h at 1000 ℃.After cold working,the tensile strength and the elonga-tion of TiNbZrTaHf were 1137 MPa and 25.1％,respectively.The annealed alloy has a high tensile strength(σb=863 MPa)and ductility(εe=28.5％).Moreover,the oxidation of TiNbZrTaHf alloy at elevated temperatures has a significant impact on its mechanical properties.The poor oxidation resistance of TiNbZrTaHf can accelerate tensile failure by inducing fractures at grain boundaries.

外文关键词：

Refractory high entropy alloyCold rollingRecrystallizationOxidation resistanceMechanical properties

作者：

Chuan Rong、Jieren Yang、Xiaoliang Zhao、Ke Huang、Ying Liu、Xiaohong Wang、Dongdong Zhu、Ruirun Chen

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作者单位：

College of Materials Science and Engineering,Sichuan University,Chengdu 610065,China

Key Laboratory of Air-Driven Equipment Technology of Zhejiang Province,Quzhou University,Quzhou 324000,China

School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China

基金：

Key R&D Plan of Sichuan ProvinceKey R&D Plan of Sichuan ProvinceChina Nuclear Power Research and Design Institute-Sichuan University Joint Innovation FundNatural Science Foundation of Zhejiang Province

项目编号：

23ZDYF0546SC2022A1C01JHG2022173 & JG2022311LQ20E010003

出版年：

2024

DOI：

10.1007/s40195-023-01649-x

金属学报(英文版)

中国金属学会

金属学报(英文版)

CSTPCD

影响因子：0.77

ISSN：1006-7191

年,卷(期)：2024.37(4)

参考文献量56