Achieving superior combined cryogenic strength and ductility in a high-entropy alloy via the synergy of low stacking fault energy and multiscale heterostructure - Details

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Abstract：

A　Co30Cr20Fe18Mn18Ni11Si3　high-entropy　alloy　(HEA)　with　low　stacking　fault　energy　and　high　strengthen　was　designed　based　on　the　principle　of　heterostructure　strengthening.　The　alloy　was　processed　into　a　multiscale　heterogeneous　microstructure　containing　hierarchical　twins.　The　alloy　achieved　an　ultrahigh　yield　strength　of　1500　MPa,　ultimate　tensile　strength　of　1750　MPa　and　a　large　ductility　of　20　%　at　77　K.　These　mechanical　properties　were　superior　to　those　of　most　FCC　HEAs　reported　in　the　literature,　breaking　the　strength-ductility　trade-off　of　conventional　metal　alloys.　Such　extraordinary　mechanical　properties　were　attributed　to　a　suitable　strain　hardening　capability,　stemming　from　the　synergistic　effect　of　hetero-deformation-induced　hardening,　twinning-induced　plasticity,　and　deformation-induced　phase　transformation　during　tensile　deformation.　©　2023　Acta　Materialia　Inc.

Keyword：

Heterogeneous structure Hetero-deformation induced hardening High-entropy alloy Mechanical properties

Author Community：

[ 1 ] [An Z.]Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
[ 2 ] [Mao S.]Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
[ 3 ] [Jiang C.]Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
[ 4 ] [Li Z.]Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
[ 5 ] [Wu S.]Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
[ 6 ] [Zhai Y.]Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
[ 7 ] [Wang L.]Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
[ 8 ] [Liu Y.]Department of Mechanical Engineering, The University of Western Australia, Perth, 6009, WA, Australia
[ 9 ] [Zhang Z.]Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
[ 10 ] [Zhang Z.]Center of Electron Microscopy, State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310058, China
[ 11 ] [Han X.]Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, 100124, China
[ 12 ] [Han X.]Department of Materials Science & Engineering, Southern University of Science and Technology, ShenZhen, China

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Related Keywords：

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Source ：

Scripta Materialia

ISSN： 1359-6462

Year： 2024

Volume： 239

6 . 0 0 0

JCR@2022

ESI Discipline： MATERIALS SCIENCE;

ESI HC Threshold：3

Cited Count：

WoS CC Cited Count： 0

SCOPUS Cited Count： 19

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 11

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