Mechanical property comparisons between CrCoNi medium-entropy alloy and 316 stainless steels

doi:10.1016/j.jmst.2021.08.057

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Mechanical property comparisons between CrCoNi medium-entropy alloy and 316 stainless steels
	Liu, Xiaoru 3,4; Feng, Hao ; Wang, Jing 4; Chen, Xuefei 3,4; Jiang, Ping 4; Yuan, Fuping 3,4; Li, Huabing 2; Ma, En 1; Wu, Xiaolei 3,4
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2022-05-10
卷号	108 页码:256-269
关键词	Medium-entropy alloy Austenite stainless steel Strain hardening Ductility Fracture toughness Charpy impact toughness
ISSN号	1005-0302
DOI	10.1016/j.jmst.2021.08.057
通讯作者	Li, Huabing(lihb@smm.neu.edu.cn) ; Ma, En(maen@xjtu.edu.cn) ; Wu, Xiaolei(xlwu@imech.ac.cn)
英文摘要	We systematically compared the mechanical properties of CrCoNi, a recently emerged prototypical medium-entropy alloy (MEA) with face-centered-cubic (FCC) structure, with hallmark FCC alloys, in particular, the well-known austenitic 316L and 316LN stainless steels, which are also concentrated singlephase FCC solid solutions and arguably next-of-kin to the MEAs. The tensile and impact properties, across the temperatures range from 373 K to 4.2 K, as well as fracture toughness at 298 K and 77 K, were documented. From room temperature to cryogenic temperature, all three alloys exhibited similarly good mechanical properties; CrCoNi increased its tensile uniform elongation and fracture toughness, which was different from the decreasing trend of the 316L and 316LN. On the other hand, the stainless steels showed higher fracture toughness than CrCoNi at all temperatures. To explain the differences in macroscopic mechanical properties of the three alloys, microstructural hardening mechanisms were surveyed. CrCoNi MEA relied on abundant mechanical twinning on the nanoscale, while martensitic transformation was dominant in 316L at low temperatures. The deformation mechanisms in the plastic zone ahead of the propagating crack in impact and fracture toughness tests were also analyzed and compared for the three alloys. (c) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
资助项目	Ministry of Sci-ence and Technology of China[2019YFA0209900] ; Ministry of Sci-ence and Technology of China[2017YFA0204402] ; NSFC Basic Science Center Program[11988102] ; NSFC[11972350] ; NSFC[11890680] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503]
WOS关键词	BRITTLE TRANSITION BEHAVIOR ; CHARPY IMPACT ENERGY ; FRACTURE-TOUGHNESS ; TEMPERATURE-DEPENDENCE ; MARTENSITIC-TRANSFORMATION ; MICROSTRUCTURAL EVOLUTION ; DEFORMATION MECHANISMS ; STRENGTH ; NITROGEN ; STABILITY
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:000787716200007
资助机构	Ministry of Sci-ence and Technology of China ; NSFC Basic Science Center Program ; NSFC ; Strategic Priority Research Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/89006]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Li, Huabing; Ma, En; Wu, Xiaolei
作者单位	1.Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Ctr Alloy Innovat & Design CAID, Xian 710049, Peoples R China 2.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xiaoru,Feng, Hao,Wang, Jing,et al. Mechanical property comparisons between CrCoNi medium-entropy alloy and 316 stainless steels[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2022,108:256-269.
APA	Liu, Xiaoru.,Feng, Hao.,Wang, Jing.,Chen, Xuefei.,Jiang, Ping.,...&Wu, Xiaolei.(2022).Mechanical property comparisons between CrCoNi medium-entropy alloy and 316 stainless steels.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,108,256-269.
MLA	Liu, Xiaoru,et al."Mechanical property comparisons between CrCoNi medium-entropy alloy and 316 stainless steels".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 108(2022):256-269.