Enhancing strength-ductility synergy in high-Mn steel by tuning stacking fault energy via precipitation

Hao Cheng ¹Lixin Sun ¹Wentao Li ¹Yang Zhang ¹Ye Cui ¹Dan Chen ¹Zhongwu Zhang¹

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作者信息

1. Key Laboratory of Superlight Materials and Surface Technology,Ministry of Education,College of Materials Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China
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Abstract

Deformation-induced twinning or martensitic transformation can improve the work-hardening capabil-ity of alloys with face-centered cubic(FCC)structures and suppress strain localization.The stacking fault energy(SFE)of alloys plays a key role in determining deformation mechanisms and mechanical prop-erties.This study developed V-bearing high-Mn steel with a tensile strength of 1288 MPa and uniform elongation of 36％by tactfully designing the composition.Precipitation of V-carbides was selected to strengthen the steel and tune the global SFE of the matrix by settling carbon.Stronger work-hardening capability due to lower SFE and finer twin/matrix lamellae provided the steel with good ductility,while precipitation strengthened it.

Key words

Precipitation/Stacking fault energy/High manganese steel/Work hardening/V-carbides

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基金项目

Natural Science Foundation of China(52171111)

Natural Science Foundation of China(U2141207)

Natural Science Foundation of China(52001083)

Youth Talent Project of China National Nuclear Corporation(CNNC2021Y-TEP-HEU01)

China Postdoctoral Science Foundation(2020M681077)

Natural Science Foundation of Heilongjiang(LH2019E030)

Heilongjiang Postdoctoral Science Foundation(LBH-Z19125)

Heilongjiang Touyan Innovation Team Program()

出版年

2024

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCD

影响因子：0.657

ISSN：1005-0302

参考文献量56

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