Influence of low temperature on properties of high entropy alloys
LI Ke-ran1, WANG Dong-liang1, DENG Lei1, JIN Jun-song1, GONG Pan1, WANG Xin-yun1
（1. State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, No. 1037 Luoyu Road, Wuhan 430074, Hubei, China）
Abstract:Because of its multi-principal component atomic composition, high entropy alloys have the potential to be used as structural engineering materials.High entropy alloys have different microstructure and excellent properties from general alloys. With the decrease of temperature, high entropy alloys generally maintain excellent physical and mechanical properties, some of which have been improved, which indicating that high entropy alloys can be used as a potential low temperature material in extreme environments such as polar research and space environment. As an extension of heat treatment, low temperature treatment is widely used in steel and nonferrous metal. Recent studies have found that low temperature treatment is also effective for high entropy alloys. This paper summarizes the changes of physical and mechanical properties of high entropy alloys at low temperatures. It reveals the effects of cryogenic treatment and cryogenic treatment combined with heat treatment and processing on the properties of high entropy alloys. The principle of obtaining excellent properties of high entropy alloys at low temperature and the effect of low temperature treatment on the microstructure of high entropy alloys are summarized.