Effects of Different Deformation Modes on Texture Evolution and Mechanical Behavior of As-Extruded AZ31 Alloy under Compression along Different Directions

The effects of different deformation modes on texture evolutions and mechanical behavior of as-extruded AZ31 alloy during compression in different directions at room temperature (RT) have been investigated by experiments and visco-plastic self-consistent (VPSC) modeling. According to the results, the relative activities of different deformation modes can fully demonstrate the general characteristics of flow curves and texture evolution. Despite a similar pattern between the relative activity of basal slip and {1012} extension twinning during compression along 45° to the extrusion direction (45ED) and perpendicular to the extrusion direction (PED), pyramidal slip has a more pronounced activity in PED, resulting in higher flow stress in PED than 45ED. Grains whose c-axis is perpendicular to loading direction (LD) cannot be reoriented, when the CRSS value was set high enough to prevent {1012} extension twinning. The {1012} extension twinning has a great influence on texture evolution and mechanical behavior. On the contrary, the {1011} contraction twinning has a negligible influence on texture evolution.