Microstructure and deformation behavior of the hot-rolled medium manganese steels with varying aluminum-content

被引：44
作者：
Cai, Z. H. [1 ]
Cai, B. [1 ]
Ding, H. [1 ]
Chen, Y. [1 ]
Misra, R. D. K. [2 ]
机构：
[1] Northeastern Univ, Sch Mat Sci & Engn, 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 / 676卷
基金：
美国国家科学基金会;
关键词：
Austenite stability; 8-ferrite; TRIP effect; Work hardening; Tensile properties; INDUCED PLASTICITY STEEL; MECHANICAL-PROPERTIES; AUSTENITE STABILITY; TRIP STEELS; HARDENING BEHAVIOR; AL; EVOLUTION; TEMPERATURE; INTERPLAY; SI;
D O I：
10.1016/j.msea.2016.08.119
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-xAl steels containing 2-6 wt% Al. The decrease in austenite fraction with increase in Al-content was accompanied by decrease in tensile strength, while the delta-ferrite content and ductility increased. 2Al steel was characterized by ultrahigh ultimate tensile strength (UTS) of 1407 MPa, while 6Al steel exhibited extremely high total elongation (TE) of 65%. The superior ductility in 6Al steel is attributed to cumulative contribution of transformation induced plasticity (TRIP) effect and twinning induced plasticity (TWIP) effect. The increase in soft 6-ferrite phase with low microhardness led to increase in TE and decrease in UTS and work hardening rate. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：263 / 270
页数：8
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