A crystal plasticity study on the deformation of an AZ31 alloy sheet under elevated temperature

Abstract

In order to investigate the evolution of deformation mechanisms of AZ31B Mg alloy sheet and their correlation with material property development under intermediate temperatures, systematic experimental examination and the crystal plasticity analysis are performed. The mechanical responses of AZ31B Mg alloy sheet are measured under uniaxial tension and compression along rolling direction, transverse direction and normal direction directions and over the temperature range 100-300°C. A series of EBSD experiments is also carried out in order to explore nucleation features in the dynamic recrystallization (DRX) of AZ31 Mg alloy sheets. Furthermore, a phenomenological DRX criterion is introduced into the visco-plastic self-consistent model through a dislocation density based hardening model to analyze the deformation of AZ31 Mg alloy sheets at 200°C. © 2018 Institute of Physics Publishing. All rights reserved.