Superb strength−ductility synergy in Si added metastable high-entropy alloys at cryogenic temperature via reinforced TRIP effect - Details

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The　tensile　behavior　of　(Fe50Mn30Co10Cr10)100−xSix　(x=0　(Si0),　2　(Si2))　metastable　HEAs　prepared　by　selective　laser　melting　was　studied　at　cryogenic　temperatures.　The　results　demonstrate　that　the　addition　of　Si　leads　to　lattice　distortion　and　a　decrease　in　stacking　fault　energy,　especially　at　77　K,　which　significantly　promotes　transformation-　induced　plasticity　(TRIP)　in　Si2　HEAs.　The　yield　strength,　tensile　strength,　and　ductility　of　Si2　HEAs　are　505.2　MPa,　1364.1　MPa,　and　19%,　which　are　43%,　53%　and　58%　higher　than　those　of　Si0　alloy,　respectively.　TRIP　is　the　main　deformation　mode,　in　addition　to　dislocation　slip,　and　plays　a　key　role　in　strengthening.　The　reinforced　and　continuously　sustained　TRIP　maintains　a　dynamic　strain　distribution　during　deformation.　Ultrahigh　strain　hardening　greatly　enhances　the　strength　and　ductility.　©　2025　The　Nonferrous　Metals　Society　of　China

Keyword：

Stacking faults High-entropy alloys Tensile strength Cobalt alloys Strain hardening Silicon alloys Hafnium alloys Iron alloys Manganese alloys

Author Community：

[ 1 ] [LI, Zhan-jiang]College of Materials Science and Engineering, Fuzhou University, Fuzhou; 350116, China
[ 2 ] [LI, Zhan-jiang]College of Materials Science and Engineering, Fujian University of Technology, Fuzhou; 350118, China
[ 3 ] [LI, Zhan-jiang]Fujian Provincial Key Laboratory of New Material Preparation and Forming Technology, Fuzhou; 350118, China
[ 4 ] [HOU, Yi-xi]Beijing Key Laboratory of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing; 100124, China
[ 5 ] [CHEN, Li]College of Materials Science and Engineering, Fuzhou University, Fuzhou; 350116, China
[ 6 ] [CHEN, Li]College of Materials Science and Engineering, Fujian University of Technology, Fuzhou; 350118, China
[ 7 ] [CHEN, Qing-xin]College of Materials Science and Engineering, Fujian University of Technology, Fuzhou; 350118, China
[ 8 ] [CHEN, Qing-xin]Fujian Provincial Key Laboratory of New Material Preparation and Forming Technology, Fuzhou; 350118, China
[ 9 ] [CHEN, Jun-feng]College of Materials Science and Engineering, Fuzhou University, Fuzhou; 350116, China
[ 10 ] [CHANG, Fa]College of Materials Science and Engineering, Fujian University of Technology, Fuzhou; 350118, China
[ 11 ] [CHANG, Fa]Fujian Provincial Key Laboratory of New Material Preparation and Forming Technology, Fuzhou; 350118, China
[ 12 ] [DAI, Pin-qiang]College of Materials Science and Engineering, Fuzhou University, Fuzhou; 350116, China
[ 13 ] [DAI, Pin-qiang]College of Materials Science and Engineering, Fujian University of Technology, Fuzhou; 350118, China
[ 14 ] [DAI, Pin-qiang]Fujian Provincial Key Laboratory of New Material Preparation and Forming Technology, Fuzhou; 350118, China
[ 15 ] [TANG, Qun-hua]School of Mechanical & Electrical Engineering, Putian University, Putian; 351100, China

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Source ：

Transactions of Nonferrous Metals Society of China (English Edition)

ISSN： 1003-6326

Year： 2025

Issue： 3

Volume： 35

Page： 872-887

4 . 5 0 0

JCR@2022

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SCOPUS Cited Count：

ESI Highly Cited Papers on the List： 0 Unfold All

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Chinese Cited Count：

30 Days PV： 11

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