耐热高熵多主元合金及其强韧化研究现状

doi:10.11896/cldb.21040085

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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.

Key words： high-entropy multi-principal-element alloy microstructure,phase strengthening

Published: 26 September 2021

CLC number:

TG132.3

Fund:National Natural Science Foundation of China (51971099).

About author:: Niu Gaoreceived her B.E. degree in 2018 and is currently pursuing her Ph.D. at School of Materials Scie-nce and Engineering, Huazhong University of Science and Technology under the supervision of associate Prof. Xinwang Liu. Her research has focused on the mechanisms of strengthening and toughening of multi-principal-element alloys.
Xinwang Liureceived his B.E. and Ph.D. degree in Harbin Institute of Technology in 2005 and 2011 respectively. He is currently an associated professor in State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology and was appointed as deputy secretary-gene-ral of the National Society of Lost Foam and V Method Casting and Hubei Foundry Society. His research inte-rests are the strengthening and toughening of metal materials, solidification process and grain refinement.

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	GAO Niu
	LIU Xinwang
	WU Weifeng
	BAI Zhucheng
	YAO Junqing
	FAN Zitian

Cite this article:

GAO Niu,LIU Xinwang,WU Weifeng, et al. Advances of the Strengthening and Toughening of High-entropy Multi-principal-element Heat-resistant Alloys[J]. Materials Reports, 2021, 35(17): 17037-17042.

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http://www.mater-rep.com/EN/10.11896/cldb.21040085 OR http://www.mater-rep.com/EN/Y2021/V35/I17/17037

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