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In-situ formed heterogeneous grain structure in spark-plasma-sintered CoCrFeMnNi high-entropy alloy overcomes the strength-ductility trade-off
Jiang, Feilong1,2; Zhao, Cancan1; Liang, Dingshan1,3; Zhu, Weiwei1,4; Zhang, Yiwen1; Pan, Shuai1,2; Ren, Fuzeng1
2020-01-13
Source PublicationMaterials Science and Engineering A
ISSN0921-5093
Volume771
Abstract

The conflict between strength and ductility has been a longstanding dilemma for metallic alloys. Herein, we present a facile strategy to overcome the strength-ductility trade-off of face-center-cubic high-entropy alloys (HEAs) via the in-situ formation of heterogeneous grain structure, using the high local temperature gradients generated during spark plasma sintering coupled with the ‘sluggish diffusion’ of HEAs. The fabricated CoCrFeMnNi HEA has a heterogeneous structure over a large range of grain size from 140 nm to 5 μm, which enables a gigapascal yield strength and a uniform elongation of 9.5%. The mechanism responsible for the associated mechanical properties was analyzed.

KeywordHeterogeneous Grain Structure High-entropy Alloy Mechanical Properties
DOI10.1016/j.msea.2019.138625
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000503324700048
Scopus ID2-s2.0-85075363600
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Cited Times [WOS]:25   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorRen, Fuzeng
Affiliation1.Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, China
2.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, China
3.Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Kowloon, Clear Water Bay, Hong Kong
4.Institute of Applied Physics and Materials Engineering, Faculty of Science & Technology, University of Macau, Macau, China
Recommended Citation
GB/T 7714
Jiang, Feilong,Zhao, Cancan,Liang, Dingshan,et al. In-situ formed heterogeneous grain structure in spark-plasma-sintered CoCrFeMnNi high-entropy alloy overcomes the strength-ductility trade-off[J]. Materials Science and Engineering A,2020,771.
APA Jiang, Feilong,Zhao, Cancan,Liang, Dingshan,Zhu, Weiwei,Zhang, Yiwen,Pan, Shuai,&Ren, Fuzeng.(2020).In-situ formed heterogeneous grain structure in spark-plasma-sintered CoCrFeMnNi high-entropy alloy overcomes the strength-ductility trade-off.Materials Science and Engineering A,771.
MLA Jiang, Feilong,et al."In-situ formed heterogeneous grain structure in spark-plasma-sintered CoCrFeMnNi high-entropy alloy overcomes the strength-ductility trade-off".Materials Science and Engineering A 771(2020).
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