| Abstract Scope |
In this study, a crystal plasticity finite element (CPFE) model is proposed to capture the abnormal mechanical response during the cyclic loading behavior of wrought magnesium (Mg) alloy sheets, specifically AZ31B and E-form (Mg-Al-based easy-formable alloy). Mg alloys, with their low-symmetric hexagonal close-packed crystal structure, have limited slip systems that can be activated at room temperature, making twinning an important mechanism in their plastic deformation. To investigate the twinning-detwinning behavior during deformation, microstructures subjected to various in-plane cyclic loading scenarios were characterized using electron backscatter diffraction. Furthermore, the residual twin fraction, which can serve as a criterion for detwinning inactivation, was examined. To complement the experimental findings, numerical simulations were performed using the CPFE model. The developed CPFE model predicts micromechanical responses, such as twin fractions and the activation of slip/twin systems during cyclic loadings, and was validated by comparison with experimentally measured data. |