Improving the strength and ductility of medium Mn steel by depleting the stress-assisted martensite

Li, Yi; Guan, Qingwen; He, Binbin

2023-03-15

10.1016/j.scriptamat.2022.115267

SCRIPTA MATERIALIA   影响因子和分区

1359-6462

1872-8456

The present work investigates the role of martensite induced by either stress or strain on the tensile properties of medium Mn steel treated by quenching and partitioning/tempering. Different from the strain-induced martensite with isolated fine martensite blocks, the stress-assisted martensite is featured with large and continuous martensite blocks, which facilitates the propagation of cracks and results in the premature fracture and thus limited tensile ductility (12.8%). A pre-deformation and tempering strategy is employed to deplete the stress -assisted martensite while promote the strain-induced martensite, turning an original soft and brittle medium Mn steel into a strong and ductile one, leading to an increment of ultimate tensile strength and total elongation of 533 MPa and 28.4%, respectively.

Stress-assisted strain-induced martensite Metastable austenite Transformation -induced plasticity Medium Mn steel

SCI ; EI

英语

第一 ; 通讯

Na- tional Natural Science Foundation of China[U52071173] ; Science and Technology Innovation Commission of Shenzhen["JCYJ20210324120209026","KQTD2019092917250571"]

Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000913768600001

PERGAMON-ELSEVIER SCIENCE LTD

20225313324001

Brittle fracture ; Ductile fracture ; Ductility ; Manganese steel ; Tensile strength

Metallography:531.2 ; Steel:545.3 ; Materials Science:951

MATERIALS SCIENCE

2-s2.0-85144818026

Web of Science

Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China

Li, Yi,Guan, Qingwen,He, Binbin. Improving the strength and ductility of medium Mn steel by depleting the stress-assisted martensite[J]. SCRIPTA MATERIALIA,2023,226.

Li, Yi,Guan, Qingwen,&He, Binbin.(2023).Improving the strength and ductility of medium Mn steel by depleting the stress-assisted martensite.SCRIPTA MATERIALIA,226.

Li, Yi,et al."Improving the strength and ductility of medium Mn steel by depleting the stress-assisted martensite".SCRIPTA MATERIALIA 226(2023).