中文版 | English
Title

An ultra-strong and ductile crystalline-amorphous nanostructured surface layer on TiZrHfTaNb0.2 high-entropy alloy by laser surface processing

Author
Corresponding AuthorRen,Fuzeng
Publication Years
2023-03-01
DOI
Source Title
ISSN
0264-1275
EISSN
1873-4197
Volume227
Abstract
Heterogeneous crystalline-amorphous nanostructures have been documented to show superior strength-ductility synergy via the co-deformation cooperative effects of nanograins and amorphous grain boundaries. In this work, a facile laser surface remelting technique with rapid cooling rate was successfully developed to fabricate a ∼ 100 μm-thick gradient nanostructured layer accompanied by phase decomposition on a TiZrHfTaNb high-entropy alloy, where a ∼ 5 μm-thick crystalline-amorphous nanostructured top surface layer with an average grain size of ∼ 7 nm was obtained. Such crystalline-amorphous nanostructured layer shows an ultrahigh yield strength of ∼ 6.0 GPa and a compression strain of ∼ 25 % during the localized micro-pillar compression tests. The atomic observations reveal that co-deformation cooperative mechanisms include the well-retained dislocation activities in nanograins but crystallization in amorphous grain boundaries, which subsequently lead to the grain coarsening via grain boundary-mediated plasticity. This study sheds light on the development of high-performance high-entropy alloys with novel crystalline-amorphous nanostructures and provides significant insight into their plastic deformation mechanisms.
Keywords
URL[Source Record]
Language
English
SUSTech Authorship
Corresponding
Scopus EID
2-s2.0-85147841914
Data Source
Scopus
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/475072
DepartmentDepartment of Materials Science and Engineering
Affiliation
1.Department of Industrial and Systems Engineering,Research Institute for Advanced Manufacturing,The Hong Kong Polytechnic University,Kowloon,Hung Hom,Hong Kong
2.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.The Hong Kong Polytechnic University Shenzhen Research Institute,Shenzhen,518060,China
First Author AffilicationDepartment of Materials Science and Engineering
Corresponding Author AffilicationDepartment of Materials Science and Engineering
Recommended Citation
GB/T 7714
Luo,Jiasi,Sun,Wanting,Liang,Dingshan,et al. An ultra-strong and ductile crystalline-amorphous nanostructured surface layer on TiZrHfTaNb0.2 high-entropy alloy by laser surface processing[J]. Materials and Design,2023,227.
APA
Luo,Jiasi.,Sun,Wanting.,Liang,Dingshan.,Yang,Wenqing.,Chan,K. C..,...&Yang,Xu Sheng.(2023).An ultra-strong and ductile crystalline-amorphous nanostructured surface layer on TiZrHfTaNb0.2 high-entropy alloy by laser surface processing.Materials and Design,227.
MLA
Luo,Jiasi,et al."An ultra-strong and ductile crystalline-amorphous nanostructured surface layer on TiZrHfTaNb0.2 high-entropy alloy by laser surface processing".Materials and Design 227(2023).
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