Enhancement of strength and ductility in non-equiatomic CoCrNi medium-entropy alloy at room temperature via transformation-induced plasticity

doi:10.1016/j.msea.2020.140516

	Enhancement of strength and ductility in non-equiatomic CoCrNi medium-entropy alloy at room temperature via transformation-induced plasticity
	Deng, H. W.2; Wang, M. M.1; Xie, Z. M.1; Zhang, T.2; Wang, X. P.1; Fang, Q. F.1; Xiong, Y.3
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2021-02-15
卷号	804
关键词	CoCrNi Medium-entropy alloy HCP TRIP Strength Ductility
ISSN号	0921-5093
DOI	10.1016/j.msea.2020.140516
通讯作者	Xie, Z. M.(zmxie@issp.ac.cn) ; Zhang, T.(zhangtao@gzhu.edu.cn)
英文摘要	Introducing the transformation-induced plasticity (TRIP) effects into the CoCrNi medium entropy alloy (MEA) to improve the strength and ductile of the alloy is a hot issue in MEA. Herein, we developed two novels non-equiatomic CoCrNi (with Co content of 40 and 50 at. %) MEAs with TRIP effects by increasing the content of Co to lowering the stacking fault energy. It was found that the HCP phase is too tiny to be neglected in Co40 alloy, while in Co50 alloy the 2% HCP phase mainly precipitating at the interface between the annealing twin and the matrix can be found. The tensile test results show that Co40 alloy exhibits a simultaneously improved yield strength (YS) and ultimate tensile strength (UTS) without sacrificing plasticity, while for Co50 alloy, the sample shows significantly increased total elongation (TE) and UTS. The microstructure evolution of Co50 alloy during the deformation process was systematically studied by interrupting the tensile test under different strains. This work proposed that non-equiatomic MEA with more desirable mechanical properties than the equiatomic one can be obtained via introducing TRIP effects.
资助项目	National Natural Science Foundation of China[51771184] ; National Natural Science Foundation of China[51801203] ; Open Project of State Key Laboratory of Environment Friendly Energy Materials[18KFHG02] ; Innovation Center of Nuclear Materials for National Defense Industry
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000615990000001
资助机构	National Natural Science Foundation of China ; Open Project of State Key Laboratory of Environment Friendly Energy Materials ; Innovation Center of Nuclear Materials for National Defense Industry
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/120206]
专题	中国科学院合肥物质科学研究院
通讯作者	Xie, Z. M.; Zhang, T.
作者单位	1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Anhui, Peoples R China 2.Guangzhou Univ, Sch Phys & Mat Sci, Ctr New Informat Funct Mat, Guangzhou 510006, Guangdong, Peoples R China 3.Southwest Univ Sci & Technol, State Key Lab Environm Friendly Energy Mat, Mianyang 621010, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Deng, H. W.,Wang, M. M.,Xie, Z. M.,et al. Enhancement of strength and ductility in non-equiatomic CoCrNi medium-entropy alloy at room temperature via transformation-induced plasticity[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,804.
APA	Deng, H. W..,Wang, M. M..,Xie, Z. M..,Zhang, T..,Wang, X. P..,...&Xiong, Y..(2021).Enhancement of strength and ductility in non-equiatomic CoCrNi medium-entropy alloy at room temperature via transformation-induced plasticity.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,804.
MLA	Deng, H. W.,et al."Enhancement of strength and ductility in non-equiatomic CoCrNi medium-entropy alloy at room temperature via transformation-induced plasticity".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 804(2021).