With increasing the predeformation temperature under 20% strain, the deformation style of the dendritic structure of AZ91D alloy changes gradually from fragmentation to directional bending.

• 形变率为20%25时，随着形变温度的提高， 组织的形变方式逐渐由以枝晶断裂为主转变为带有方向性的弯曲。