Mechanistic contribution of the interplay between microstructure and plastic deformation in hot-rolled Fe-11Mn-2/4Al-0.2C steel

被引：29
作者：
Cai, Z. H. [1 ]
Ding, H. [1 ]
Misra, R. D. K. [2 ]
Qiguan, S. Q. [1 ]
机构：
[1] Northeastern Univ, Sch Met & Mat, Shenyang 110819, Peoples R China
[2] Univ Texas El Paso, Lab Excellence Adv Steel Res, Dept Met Mat & Biomed Engn, El Paso, TX 79968 USA
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2016年 / 652卷
基金：
美国国家科学基金会;
关键词：
Austenite stability; TRIP; Portevin-Le Chatelier effect; Work hardening; Tensile properties; WORK-HARDENING BEHAVIOR; AUSTENITE STABILITY; TENSILE BEHAVIOR; TRANSFORMATION; EVOLUTION; DUCTILITY; FERRITE;
D O I：
10.1016/j.msea.2015.11.084
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We elucidate here the mechanistic contribution of the interplay between microstructural constituents and plastic deformation behavior in hot-rolled Fe-0.2C-11Mn-2Al (2Al steel) and Fe-0.2C-11Mn-4Al (4AI steel) transformation induced plasticity (TRIP) steels. The steel containing lower aluminum content (2 wt%) was characterized by excellent combination of tensile elongation (TE) of 31.4%, ultimate tensile strength (UTS) of 1407 MPa, and UTS x TE of 44.2 GPa%, where the ultrahigh strength is attributed to the cumulative contribution of the newly transformed martensite with high microhardness and Portevin-Le Chatelier (PLC) effect. In contrast, the higher aluminum (4 wt%) containing steel indicated lower UTS of < 1200 MPa, but higher TE of 34-40%, which resulted from the TRIP effect and the cooperative deformation of alpha-ferrite and delta-ferrite. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：205 / 211
页数：7
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