Characterization of continuous dynamic recrystallization in WE43 magnesium alloy

The occurrence of continuous dynamic recrystallization in a solutionized WE43 alloy during compressive deformation at 450 degrees C was studied. It was revealed that dynamic formation of second phase particles may exhaust strain-hardening capacity of material, causing the deformation to be concentrated in shear regions. The results showed that prismatic < a > systems play the role as dominant deformation mechanism during shear band formation. The promotion of dislocation activity in this regions assist in the development of low angle boundaries, the misorientation of which is gradually increased with further deformation. The results indicated that, unlike common magnesium alloys, continuous dynamic recrystallization in the RE-containing experimental alloy involves the rotation of grains about non-basal poles. This was discussed relying on the pronounced contribution of non-basal slip during recrystallization of grains within shear regions.