Hardening behavior and texture evolution of TWIP steel during strain path change

17th International Conference on Textures of Materials

材料科学;物理学

Wen, W.^1 ; Borodachenkova, M.^1 ; Pereira, A.^1 ; Barlat, F.^1,2 ; Gracio, J.^1

Department of Mechanical Engineering, University of Aveiro, Campo Universitário de Santiago, Aveiro

3810-193, Portugal^1

Materials Mechanics Laboratory, Graduate Institute of Ferrous Technology, Pohang University of Science and Technology, San31, Hyoja-Dong, Nam-Ku, Pohang

790-784, Korea, Republic of^2

关键词: Crystallographic textures;    Dislocation structures;    Hardening behavior;    Mechanical behavior;    Mechanical response;    Strain path change;    Strain stress curve;    Texture evolutions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/82/1/012089/pdf
DOI  :  10.1088/1757-899X/82/1/012089

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Polycrystal materials exhibit large changes in the flow stress and hardening behavior during the strain path change. Such changes are related with the crystallographic texture anisotropy and the rearrangement of dislocation structure during the pre-loading. These effects have been captured by a dislocation hardening model embedded in the visco-plastic selfconsistent (VPSC) model. In this work, the texture evolution and mechanical behavior of TWIP steel during the strain path change are investigated. The experimental studies are carried out on rolled TWIP steel sheet. The mechanical responses are obtained under tensile tests along rolling direction, followed by tension along the directions with 0° and 90° from the pre-loading direction. The simulated results of strain-stress curves and the texture evolution are in good agreement with the experimental data.