Advances of the Strengthening and Toughening of High-entropy Multi-principal-element Heat-resistant Alloys
GAO Niu, LIU Xinwang, WU Weifeng, BAI Zhucheng, YAO Junqing, FAN Zitian
State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Abstract: Heat-resistant alloys are unique high-temperature materials widely used in the aerospace and shipbuilding industries. However,operating temperatures are now reaching limits posed by the melting temperatures of these materials.Since 2004, a new alloy design philosophy—high-entropy alloy (HEAs) or multi-principle-element alloys (MPEAs) were proposed, which have attracted significant attention due to their excellent mechanical properties, including high strength and high ductility. Due to their superior mechanical performance, HEAs are promising to be deve-loped on heat-resistant alloys. Among them, refractory HEAs with body-centered cubic (BCC) structure exhibit high high-temperature strength but poor room-temperature plasticity, while HEAs with face-centered cubic (FCC) structure show great ductility but low high-temperature strength. A variety of strengthening and toughening methods were conducted for FCC and BCC HEAs, respectively. The present work summarizes the research progress of heat-resistant HEAs. The microstructure evolution and mechanical properties at high temperatures are briefly reviewed. Finally,the future perspective of heat-resistant HEAs is prospected.
高妞, 刘鑫旺, 吴伟峰, 白朱成, 姚俊卿, 樊自田. 耐热高熵多主元合金及其强韧化研究现状[J]. 材料导报, 2021, 35(17): 17037-17042.
GAO Niu, LIU Xinwang, WU Weifeng, BAI Zhucheng, YAO Junqing, FAN Zitian. Advances of the Strengthening and Toughening of High-entropy Multi-principal-element Heat-resistant Alloys. Materials Reports, 2021, 35(17): 17037-17042.
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