Enhanced tensile properties and wear resistance of additively manufactured CoCrFeMnNi high-entropy alloy at cryogenic temperature

作     者：Hong-Ge Li Peng-Cheng Che Xiao-Kun Yang Yong-Jiang Huang Zhi-Liang Ning Jian-Fei Sun Hong-Bo Fan Hong-Ge Li;Peng-Cheng Che;Xiao-Kun Yang;Yong-Jiang Huang;Zhi-Liang Ning;Jian-Fei Sun;Hong-Bo Fan

作者机构：School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China Harbin-Electric Power Generation Equipment National Engineering Research Center Co.LtdHarbin 150028China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2022年第41卷第4期

页      面：1210-1216页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：the National Natural Science Foundation of China(Nos.52171154,52071118,51871076 and 51827801) the National Key Research and Development Program of China(No.2018YFB1105200) 

主　　题：wear cryogenic alloy 

摘      要：Here,bulk CoCrFeMnNi high-entropy alloy was prepared via laser melting deposition,and its microstructure and mechanical properties at room and cryogenic temperature were investigated by a series of microstructural character-izations and mechanical *** results showed that the as-built samples possessed a single fcc phase and highly dense *** to the mechanical prop-erties at room temperature,tensile properties,microhard-ness and wear resistance of the as-built samples showed a signiflcant enhancement at cryogenic temperature,which was attributed to the deformation mechanism converting from dislocation slipping to deformation twinning at cryogenic *** formation of deformation nanotwins signiflcantly improved the deformation resis-tance in cryogenic conditions,and the sliding wear in the liquid nitrogen could decrease the oxygen concentration,suppress the generation of oxide particles and thus enhance the wear resistance.