中文版 | English
Title

Exceptional Strain-Hardening Capacity of a Medium-Entropy Alloy CoCrNi With Grain-Size Gradient Structure

Author
Corresponding AuthorXu, Jiao; Ren, Fuzeng
Publication Years
2023-02-01
DOI
Source Title
ISSN
1073-5623
EISSN
1543-1940
Abstract
Surface mechanical attrition treatment (SMAT) was used to produce a surface layer with grain-size gradient along the thickness of spark-plasma-sintered medium-entropy alloy CoCrNi. In comparison with the spark-plasma-sintered fine-grained CoCrNi, the alloy after SMAT shows a 46 pct increase in yield strength and over three times higher strain-hardening rate ((d sigma)/(d epsilon)). The ultimate tensile strength (sigma(UTS)) and the elongation (epsilon(f)) reach 1420 MPa and 61.3 pct, respectively. The excellent strength-ductility synergy should be attributed to the Hall-Petch strengthening and the formation of high density of dislocations and nanotwins.
URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
First ; Corresponding
Funding Project
Shenzhen Fundamental Research Project[JCJY20190809153205492] ; National Natural Science Foundation of China[52122102]
WOS Research Area
Materials Science ; Metallurgy & Metallurgical Engineering
WOS Subject
Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS Accession No
WOS:000949169600003
Publisher
ESI Research Field
MATERIALS SCIENCE
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/523975
DepartmentDepartment of Materials Science and Engineering
Affiliation
1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Hong Kong Univ Sci & Technol, Dept Mech & Aerosp Engn, Clear Water Bay, Hong Kong, Peoples R China
3.Shenzhen Univ, Inst Semicond Mfg Res, Shenzhen 518060, Guangdong, Peoples R China
First Author AffilicationDepartment of Materials Science and Engineering
Corresponding Author AffilicationDepartment of Materials Science and Engineering
First Author's First AffilicationDepartment of Materials Science and Engineering
Recommended Citation
GB/T 7714
Wei, Pengbo,Yan, Kai,Xu, Jiao,et al. Exceptional Strain-Hardening Capacity of a Medium-Entropy Alloy CoCrNi With Grain-Size Gradient Structure[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,2023.
APA
Wei, Pengbo,Yan, Kai,Xu, Jiao,&Ren, Fuzeng.(2023).Exceptional Strain-Hardening Capacity of a Medium-Entropy Alloy CoCrNi With Grain-Size Gradient Structure.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE.
MLA
Wei, Pengbo,et al."Exceptional Strain-Hardening Capacity of a Medium-Entropy Alloy CoCrNi With Grain-Size Gradient Structure".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE (2023).
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