Dynamic Mechanical Property Anisotropy of ZA31 Alloy by Equal Channel Angular Pressing

the microstuctures and orientations changing of hot extrusion AZ31 magnesium alloy were obtained by equal channel angular pressing (ECAP). After the ECAP samples annealed, the dynamic anistropy of AZ31 alloy in different impacting directions were given by dynamic compressing in HSPB system. The results showed that with pression passes increasing, the grains were refined more obviously and {0002}< 11-20 > texture component increased and concentrated in the center of the pole figure. The maxmium reduction under impacting direction (ID) parelleled to extrusion direction (ED) is larger than that of ID //ND during dynamic compressing, and there was a obvious strain softing in the strain-stress curves. However, the dramatic strain hardening and higher yield strength appeared in the stress-strain figure when ID parelleled to ND. In addition, the reasons for mechanical anistropy of AZ31 alloy were discussed in a way of grains orientationes changing.