The impact of thermo-mechanical controlled processing on structure-property relationship and strain hardening behavior in dual-phase steels

被引：26

作者：

Li, Cheng-Ning ^{[1
]}

Ji, Feng-Qin ^{[1
]}

Yuan, Guo ^{[1
]}

Kang, Jian ^{[1
]}

Misra, R. D. K. ^{[2
]}

Wang, Guo-Doug ^{[1
]}

机构：

[1] Northeastern Univ, State Key Lab Rolling & Automat, POB 105,11,Lane 3,Wenhua Rd, Shenyang 110819, Peoples R China

[2] Univ Texas El Paso, Lab Excellence Adv Steel Res, Innovat & Dept Met Mat & Biomed Engn, El Paso, TX 79912 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2016年 / 662卷

基金：

中国国家自然科学基金;

关键词：

Thermo-mechanical controlled processing; Dual-phase steel; Phase transformation; Strain hardening; Cooling schedule; HIGH-STRENGTH STEELS; MECHANICAL-PROPERTIES; TENSILE PROPERTIES; MICROSTRUCTURE; MARTENSITE; MORPHOLOGY; STRESS; CARBON; TRANSFORMATION;

D O I：

10.1016/j.msea.2016.03.055

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We elucidate here the impact of thermo-mechanical controlled processing (TMCP) in governing nucleation of second phase in Nb-Ti microalloyed dual-phase steels. A wide range of mechanical properties were obtained through change in the microstructure, depending on the TMCP cooling schedule. Polygonal ferrite matrix with martensite as the second phase exhibited highest initial strain hardening rate, lowest yield strength, and highest tensile strength as compared to the situation when bainite or bainite-martensite was the second phase. The Crussard-Jaoul (C-J)strain hardening behavior of granular bainite and granular bainite-martensite as the second phase exhibited one-stage characterized by linear and parabolic behavior, respectively. On the other hand, two stages were observed in steel containing martensite as the second phase, viz., linear stage I and parabolic stage II. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：100 / 110

页数：11

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