Improved yield strength-ductility synergy of a high Mn TWIP steel by grain refinement and partial recrystallization

被引：5
作者：
Zhang, W. X. [1 ]
Wang, J. [2 ]
Wan, J. [1 ]
Cong, Y. B. [1 ]
Li, C. [1 ]
Chen, Y. Z. [1 ,3 ,4 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
[2] Northwest Inst Nonferrous Met Res, Xian 710016, Shaanxi, Peoples R China
[3] Suzhou Yunjing Met Tech ltd, Suzhou 215024, Jiangsu, Peoples R China
[4] Northwestern Polytech Univ, Ningbo Inst, Ningbo 315103, Zhejiang, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2024年 / 916卷
基金：
中国国家自然科学基金;
关键词：
TWIP steel; Yield strength; Grain refinement; Dislocation density; INDUCED PLASTICITY STEEL; TENSILE DEFORMATION-BEHAVIOR; MECHANICAL-PROPERTIES; MICROSTRUCTURE; ENHANCEMENT; COMBINATION;
D O I：
10.1016/j.msea.2024.147355
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The industrial application of high Mn twinning-induced plasticity (TWIP) steels is limited by their low yield strength (YS). In this work, a combination of grain refinement and partial recrystallization was applied to increase the YS of a high Mn TWIP steel to 1215 MPa, along with a total elongation (TE) of 16 %. The high YS of the partially recrystallized steel mainly originates from the combination effect of high dislocation density up to 8.3 x 1014 m- 2, fine grain size of about 1 mu m in recrystallized regions, and dense mechanical twins with a small spacing of about 20 nm in unrecrystallized regions. This work provides a potential way to improve the YSductility synergy and broaden the application of TWIP steels.
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页数：5
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