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

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

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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.

PrecipitationStacking fault energyHigh manganese steelWork hardeningV-carbides

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

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

Natural Science Foundation of ChinaNatural Science Foundation of ChinaNatural Science Foundation of ChinaYouth Talent Project of China National Nuclear CorporationChina Postdoctoral Science FoundationNatural Science Foundation of HeilongjiangHeilongjiang Postdoctoral Science FoundationHeilongjiang Touyan Innovation Team Program

52171111U214120752001083CNNC2021Y-TEP-HEU012020M681077LH2019E030LBH-Z19125

2024

10.1016/j.jmst.2023.11.032

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)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.187(20)
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