After ECAP and accompanying with the pressing times increasing, the initial grains of pure aluminum L2 that are equiaxed in shape and about 1mm in size transform into small equiaxed grains.

• 纯锅L2原始晶粒大小为1mm的近等轴状晶,ECAP后,随挤压道次的增加,向细小等轴晶转变。