Stabilizing austenite via intercritical Mn partitioning in a medium Mn steel

被引：37
作者：
Hu, Baojia [1 ,2 ]
Zheng, Qinyuan [1 ,2 ]
Lu, Yi [1 ,2 ]
Jia, Chunni [1 ]
Liang, Tian [3 ]
Zheng, Chengwu [1 ]
Li, Dianzhong [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
[3] Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
来源：
SCRIPTA MATERIALIA | 2023年 / 225卷
关键词：
Medium Mn steel; Mn partitioning; Austenite stabilization; TRIP effect; Mechanical properties; TRANSFORMATION-INDUCED PLASTICITY; MECHANICAL-PROPERTIES; PROPERTY RELATIONSHIP; TENSILE PROPERTIES; STRENGTH; BEHAVIOR; MICROSTRUCTURE; TOUGHNESS; REVERSION; FERRITE;
D O I：
10.1016/j.scriptamat.2022.115162
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this study, a novel processing route of intercritical Mn partitioning is proposed to stabilize the reverted austenite in a medium Mn steel. The Fe-5Mn-0.2C-1.5Al (wt.%) steel is annealed unceasingly at two intercritical temperatures to produce a compositional core-shell structured reverted austenite which consists of a core in low Mn content and a shell in relatively high Mn content. This distinctive microstructure can not only allow much more retained austenite to be obtained compared with the conventional processing route, but also produce active transformation induced plasticity effect over a broad strain range, leading to excellent mechanical properties of high strength and enhanced ductility.
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页数：6
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