Mechanical properties and austenite stability in hot-rolled 0.2C-1.6/3.2Al-6Mn-Fe TRIP steel

被引：91

作者：

Li, Z. C. ^{[1
]}

Ding, H. ^{[1
]}

Cai, Z. H. ^{[1
]}

机构：

[1] Northeastern Univ, Sch Met & Mat, Shenyang 110819, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 639卷

基金：

中国国家自然科学基金;

关键词：

Hot-rolled; Mechanical properties; Work-hardening behavior; Austenite stability; WORK-HARDENING BEHAVIOR; DEFORMATION-BEHAVIOR; MARTENSITIC-TRANSFORMATION; MICROSTRUCTURAL EVOLUTION; RETAINED AUSTENITE; STRAIN; DUCTILITY; FERRITE;

D O I：

10.1016/j.msea.2015.05.061

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this investigation, the microstructures and mechanical properties of hot-rolled Fe-0.2C-6.1 Mn-1.6A1 (wt%) (1.6Al steel) and Fe-0.2C-5.9Mn-3.2Al (wt%) (3.2Al steel) transformation induced plasticity (TRIP) steels were studied. An optimized quenching and tempering (Q&T) adopted on 1.6A1 steel led to ferrite-austenite microstructure characterized by 57% austenite and excellent combination of tensile strength of 1040 MPa and total elongation of 40.8% has been attained. The superior mechanical properties are mainly attributed to the discontinuous TRIP effect and the cooperative deformation of ferrite, where the discontinuous TRIP effect which is a consequence of the non-uniform distribution of manganese and carbon in austenite laths with various lengths. In contrast, 3.2Al steel with 34% austenite demonstrated lower tensile strength of 942 MPa and elongation of 35.4%, which is resulted from the TRIP effect and softening effect of ferrite. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：559 / 566

页数：8

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