Effect of volume fraction of bainite on strain hardening behavior and deformation mechanism of F/B multi-phase steel

被引：42

作者：

Tang, C. J. ^{[1
]}

Shang, C. J. ^{[2
]}

Liu, S. L. ^{[3
]}

Guan, H. L. ^{[4
]}

Misra, R. D. K. ^{[5
]}

Chen, Y. B. ^{[1
]}

机构：

[1] Beijing Natl Innovat Inst Lightweight Ltd, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, Collaborat Innovat Ctr Steel Technol, Beijing 100083, Peoples R China

[3] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

[4] Tangshan Zwell Technol Co Ltd, Zunhua 064200, Peoples R China

[5] Univ Texas El Paso, Lab Excellence Adv Steel Res, Mat Sci & Engn Program, Dept Met Mat & Biomed Engn, 500 W Univ Ave, El Paso, TX 79968 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2018年 / 731卷

关键词：

F/B multi-phase steel; Strain hardening behavior; Volume fraction of bainite; Modified C-J analysis; Yield ratio; Strain hardening exponent; DUAL-PHASE STEELS; METAL-MATRIX COMPOSITES; UNIT-CELL MODELS; MICROSCOPIC DEFORMATION; TENSILE PROPERTIES; MARTENSITE; MORPHOLOGY; MICROSTRUCTURE; PIPES; GRADE;

D O I：

10.1016/j.msea.2018.06.016

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Five ferrite/bainite (F/B) multi-phase experimental steels with different volume fraction of bainite were processed by thermo-mechanical controlled processing (TMCP). The strain hardening behavior and deformation mechanism of F/B multi-phase steel were studied by modified C-J analysis, Hollomon analysis and numerical simulation method. The study indicates that the deformation mechanism in stage I and stage II are directly related to elastic-plastic deformation of ferrite and uniform strain (deformation) of ferrite and bainite, respectively. As the volume fraction of bainite increases, the deformation mechanism of ferrite and bainite changes from incoordinate deformation to coordinate deformation, which will cause the strain difference between ferrite and bainite being lessened gradually, as well as might be the reason for the transition from three-stage to two-stage in modified C-J analysis. The deformation mechanism was verified experimentally. Moreover, the effect of volume fraction of bainite on yield stress/tensile stress ratio (yield ratio), strain hardening exponent and uniform elongation were explained by the division and strain hardening capability of the stages in modified C-J analysis.

引用

页码：173 / 183

页数：11

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