Buck of ultra-fine grain (submicrostructured or na-nostructured materials) materials could be acquired by equal channel angular pressing (ECAP) with enough deformation.

• 通过等通道弯角挤压(Equal channel angular pressing,ECAP)工艺累积足够的变形制备块状超细晶粒材料(亚微米或纳米微观结构材料)。