对单相铝合金进行适当的加工热处理，形成在高温下可稳定存在的未再结晶组织，再对这种组织的合金进行高温变形时，在产生超细晶组织的同时，有时会出现超塑性．由未再结晶组织生成新的结晶组织的过程，是变形组织中的小角度亚晶界在变形中变成大角度晶界，在该处生成新晶粒的? The single-phase aluminum alloy suitable for heat treatment, the formation of high temperature can exist in the non-recrystallized structure, and then the organization of the alloy at high temperature deformation, in the production of ultrafine grained at the same time, sometimes there will be superplastic . From the non-recrystallized tissue to generate new crystalline structure of the process, the deformation of the organization of small-angle subgrain boundaries in the deformation into large-angle grain boundaries, where the new crystal?