A novel ultrafine-grained Fe-22Mn-0.6C TWIP steel with superior strength and ductility

被引：90
|
作者：
Tian, Y. Z. [1 ,2 ,3 ]
Bai, Y. [2 ]
Zhao, L. J. [2 ,4 ]
Gao, S. [2 ]
Yang, H. K. [1 ]
Shibata, A. [2 ,3 ]
Zhang, Z. F. [1 ]
Tsuji, N. [2 ,3 ]
机构：
[1] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
[2] Kyoto Univ, Dept Mat Sci & Engn, Sakyo Ku, Kyoto 6068501, Japan
[3] Kyoto Univ, ESISM, Sakyo Ku, Kyoto 6068501, Japan
[4] Colorado Sch Mines, Dept Met & Mat Engn, Adv Steel Proc & Prod Res Ctr, Golden, CO 80401 USA
来源：
MATERIALS CHARACTERIZATION | 2017年 / 126卷
基金：
中国国家自然科学基金;
关键词：
Twinning-induced plasticity (TWIP); steel; Ultrafine grain (UFG); Twin; Strength; Ductility; STACKING-FAULT ENERGY; INDUCED PLASTICITY STEELS; MANGANESE AUSTENITIC STEEL; STRAIN-HARDENING BEHAVIOR; CU-AL ALLOYS; MECHANICAL-PROPERTIES; UNIFORM ELONGATION; SIZE; DEFORMATION; MICROSTRUCTURE;
D O I：
10.1016/j.matchar.2016.12.026
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A fully recrystallized ultrafine-grained (UFG) Fe-22wt.%Mn-0.6wt.%C twinning-induced plasticity (TWIP) steel with mean grain size of 576 nm was fabricated by cold rolling and annealing process. Tensile test showed that this UFG steel possessed high yield strength of 785 MPa, and unprecedented uniform elongation of 48%. The Hall-Petch relationship was verified from the coarse-grained (CG) regime to the ultrafine-grained (UFG) regime. The microstructures at specified tensile strains were characterized by electron backscattered diffraction (EBSD) and transmission electron microscopy (TEM). The microstructures and strain hardening behavior of the UFG TWIP steel were compared with the CG counterpart. The strong strain hardening capability of the UFG steel is supposed to be responsible for the high strength and good ductility. (C) 2017 Elsevier Inc All rights reserved.
引用
收藏
页码：74 / 80
页数：7
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