Transactions of Materials and Heat Treatment

Title：Influence of heat treatment on microstructure and hardness of high entropy alloy AlFeCrCoNiMo

Authors： Ban Yufeng Liu Guizhong Dong Xintao Guo Jingjie

Unit： Guilin University of Electronic Technology Harbin Institute of Technology

KeyWords： high entropy alloy annealing microscopic stress hardness intermetallic compounds

ClassificationCode：TG142.1

year,vol(issue):pagenumber：2017,42(7):136-140

Abstract：

High entropy alloy AlFeCrCoNiMo was prepared by vacuum arc melting, and the influences of annealing on the microstructure and hardness of high entropy alloys were investigated by X-ray diffraction （XRD）, scanning electron microscopy（SEM） and hardness tester. The results show that the crystal structure of cast alloy and annealed alloy is dendritic structure, which is composed of Cr9Mo21Ni20 and NiCoCr intermetallic compound eutectic structure. The FCC phase decreases gradually and will release new intermetallic compound with the rising of annealing temperature. The microscopic stress of alloy shows a variation trend of increasing first and then decreasing, and its hardness increases first and then decreases with the rising of annealing temperature. The variation trend of stress and hardness of alloy is consistent. The maximum hardness is obtained when the annealing temperature reaches 800 ℃.

Funds：

国家自然科学基金资助项目（511610065）

作者简介：班煜峰(1989-)，男，硕士研究生，E-mail：1391039362@qq.com；通讯作者: 刘贵仲（1974-），男，博士，副教授，E-mail：lgzlgz@guet.edu.cn

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