IMECH-IR  > 非线性力学国家重点实验室
Dual heterogeneous structured medium-entropy alloys showing a superior strength-ductility synergy at cryogenic temperature
Zhang ZH(张子晗)1,2; Wang W(王为)1; Tan S(覃双)1; Yang MX(杨沐鑫)1; Wang J(王晶)1; Jiang P(姜萍)1; Yuan FP(袁福平)1,2; Wu XL(武晓雷)1,2
Corresponding AuthorYuan, Fuping(fpyuan@lnm.imech.ac.cn)
Source PublicationJOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
2022-03-01
Volume17Pages:3262-3276
ISSN2238-7854
AbstractThe tensile properties and the corresponding deformation mechanisms at both room and cryogenic temperatures for a CoCrNi-based medium entropy alloy with both a homogeneous structure and a dual heterogeneous structure have been studied and compared. The dual heterogeneous structure is found to be composed of both heterogeneous grain structure and coherent L1(2) nanoprecipitates. Both the homogeneous structure and the dual heterogeneous structure show a simultaneous improvement on yield strength and uniform elongation at cryogenic temperature as compared to those at room temperature, which can be attributed to higher hetero-deformation-induced hardening rate and higher density of geometrically necessary dislocations induced at cryogenic temperature. For the homogeneous structure, nano-spaced stacking faults along two slip systems with much smaller interspacing and higher density of Lomer-Cottrell locks should play the essential role in sustaining the strain hardening for better tensile ductility at cryogenic temperature. L1(2) nanoprecipitates are observed to be very effective on blocking dislocation slip and accumulation of dislocations around them. For the dual heterogeneous structure, more intense interactions between defects and L1(2) nanoprecipitates are observed after tensile deformation at cryogenic temperature, resulting in fragmentation and refinement of L1(2) nanoprecipitates for better tensile properties than at room temperature. (C) 2022 The Author(s). Published by Elsevier B.V.
KeywordHigh entropy alloys Dual heterogeneous structures Precipitates Strain hardening Cryogenic properties
DOI10.1016/j.jmrt.2022.02.078
Indexed BySCI ; EI
Language英语
WOS IDWOS:000779147700004
WOS KeywordSTRAIN-GRADIENT PLASTICITY ; CHARPY IMPACT PROPERTIES ; MECHANICAL-PROPERTIES ; INTERNAL-STRESSES ; DEFORMATION ; STEEL ; TENSILE ; CRCONI ; MN ; BEHAVIOR
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding ProjectNSFC Basic Science Center Program[11988102] ; National Key R&D Program of China[2017YFA0204402] ; National Natural Science Foundation of China[11790293] ; National Natural Science Foundation of China[52192591] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503]
Funding OrganizationNSFC Basic Science Center Program ; National Key R&D Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
Classification一类
Ranking1
ContributorYuan, Fuping
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/88872
Collection非线性力学国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, 15 West Rd,North 4th Ring, Beijing 100190, Peoples R China;
2.Univ Chinese Acad Sci, Sch Engn Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhang ZH,Wang W,Tan S,et al. Dual heterogeneous structured medium-entropy alloys showing a superior strength-ductility synergy at cryogenic temperature[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2022,17:3262-3276.
APA 张子晗.,王为.,覃双.,杨沐鑫.,王晶.,...&武晓雷.(2022).Dual heterogeneous structured medium-entropy alloys showing a superior strength-ductility synergy at cryogenic temperature.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,17,3262-3276.
MLA 张子晗,et al."Dual heterogeneous structured medium-entropy alloys showing a superior strength-ductility synergy at cryogenic temperature".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 17(2022):3262-3276.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[张子晗]'s Articles
[王为]'s Articles
[覃双]'s Articles
Baidu academic
Similar articles in Baidu academic
[张子晗]'s Articles
[王为]'s Articles
[覃双]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[张子晗]'s Articles
[王为]'s Articles
[覃双]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.