Numerical and Experimental Investigation on Microstructure Deformation Mechanism of Cold-rolled Dual Phase Steel
A RVE (Representative Volume Element) model based on real microstructure images of dual phase (DP) steel was established to study the microstructure deformation mechanism and the partitioning of stress and strain in ferrite and martensite phase.In situ analysis method was applied to further study the strain partitioning of dual phase steel.The results showed that the simulated results by finite element method for the deformation process coincide quite well with the experimental results.The grid size has a greater effect on stress compared with plastic strain.The stress and strain partitioning in ferrite and martensite phases are obviously uneven,stress concentration present in martensite phase during the deformation process of dual phase steel,while strain concentration phenomenon can be observed in ferrite phase.Martensite phase is the main bearing phase of dual phase steel,its content and property have a great influence on the mechanical properties of dual phase steel; plastic strain mainly concentrate in the ferrite phase.Local strain zones occur in ferrite phase along the tangential direction during tensile deformation.
dual phase steel microstructure deformation mechanism RVE numerical simulation
LI Shengci KANG Yonglin ZHU Guoming LV Chao HAN Qihang ZHAO Xianmeng
School of Materials Science and Engineering, University of Science and Technology Beijing,Beijing 100083, China
国际会议
成都
英文
615-618
2016-11-16（万方平台首次上网日期，不代表论文的发表时间）