Mechanical property comparisons between CrCoNi medium-entropy alloy and 316 stainless steels | |
Liu XR(刘潇如)1,2![]() ![]() ![]() ![]() ![]() | |
Source Publication | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2022-05-10 | |
Volume | 108Pages:256-269 |
ISSN | 1005-0302 |
Abstract | 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. |
Keyword | Medium-entropy alloy Austenite stainless steel Strain hardening Ductility Fracture toughness Charpy impact toughness |
DOI | 10.1016/j.jmst.2021.08.057 |
Indexed By | SCI ; EI |
Language | 英语 |
WOS ID | WOS:000787716200007 |
WOS Keyword | BRITTLE TRANSITION BEHAVIOR ; CHARPY IMPACT ENERGY ; FRACTURE-TOUGHNESS ; TEMPERATURE-DEPENDENCE ; MARTENSITIC-TRANSFORMATION ; MICROSTRUCTURAL EVOLUTION ; DEFORMATION MECHANISMS ; STRENGTH ; NITROGEN ; STABILITY |
WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
Funding Project | 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] |
Funding Organization | Ministry of Sci-ence and Technology of China ; NSFC Basic Science Center Program ; NSFC ; Strategic Priority Research Program of the Chinese Academy of Sciences |
Classification | 一类 |
Ranking | 1 |
Contributor | Li, Huabing |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://dspace.imech.ac.cn/handle/311007/89007 |
Collection | 非线性力学国家重点实验室 |
Affiliation | 1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 3.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China; 4.Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Ctr Alloy Innovat & Design CAID, Xian 710049, Peoples R China |
Recommended Citation GB/T 7714 | Liu XR,Feng H,Wang J,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 XR.,Feng H.,Wang J.,Chen XF.,Jiang P.,...&Wu XL.(2022).Mechanical property comparisons between CrCoNi medium-entropy alloy and 316 stainless steels.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,108,256-269. |
MLA | Liu XR,et al."Mechanical property comparisons between CrCoNi medium-entropy alloy and 316 stainless steels".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 108(2022):256-269. |
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