Research Progress on High Temperature Properties of High-Entropy Alloys

Author of the article:JIA Yuhao, WANG Zhijun, WU Qingfeng, WANG Jinyu, LIU Linxiang, HE Feng, LI Junjie, WANG Jincheng

Author's Workplace：State Key Laboratory of Solidification, Northwestern Polytechanical University, Xi'an 710072, China

Abstract：As a new alloy design concept, high-entropy alloys expand the scope of alloy design from the corners of the phase diagram that traditional alloy design focuses on to the broad area in the middle of the phase diagram. This concept also creates its own unique properties. Among many types of high-entropy alloys, some have broad high-temperature application prospects and are expected to become a new generation of high-temperature materials, such as high-temperature high-entropy alloys and refractory high-entropy alloys. High-temperature high-entropy alloys generally have a phase structure of γ/γ′ , which is similar to traditional nickel-based superalloys. Refractory high-entropy alloys achieve high-temperature strength by adding a variety of high-melting refractory elements. In this paper, the research progress on the high-temperature properties of high-entropy alloys will be reviewed and discussed in terms of short-term mechanical properties, microstructure stability, creep, fatigue, and oxidation resistance.