Mesoscale Simulation of Deformation Behaviors of E‑form and AZ31 Mg Alloys During Ex‑Situ Mini‑V‑Bending Tests

다국어 초록 (Multilingual Abstract)

Mesoscale simulations based on the resolved shear stress (RSS) analysis and the crystal plasticity finite element method(CPFEM) simulations were used to elucidate the deformation behaviors of E-form and AZ31 magnesium (Mg) alloys andthe evolution of tension twin (TTW) and compression twin (CTW) variants during mini-V-bending. RSS analysis, which isbased on the Schmid tensor, was used to calculate the type of twin variants and the number of TTW and CTW variants thatevolved in the deformed Mg alloys. However, RSS analysis considers neither the critical resolved shear stress (CRSS) oftwin systems nor the interaction with neighboring grains, and it failed to accurately predict the twin behaviors of deformedgrains. This study simulated the spatial distributions of the relative activities of different deformation modes, accumulatedtwin fractions, accumulated plastic strains, and effective stresses via CPFEM. Compared with the RSS analysis, CPFEMsimulation precisely explained the twin behaviors observed in both E-form and AZ31 Mg alloys.

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