研究金属材料塑性变形的滑移模式及微观组织结构的演变过程。利用电子背散射衍射(EBSD)技术,表征了铜单晶体的形变微观组织结构。在不同的应变量下,铜单晶体的形变微观组织结构存在着明显的差别。低应变量(20%)下,其形变微观组织结构主要是高密度位错墙;应变量增高至50%时,其形变微观组织结构中还出现了微带、位错胞及位错胞块。不同应变量下的微观组织结构的差异,主要由不同的形变阶段,晶体的滑移模式不同造成。 The sliding mode of the plastic deformation of metal materials and the evolution of microstructures are studied. Deformation microstructure of copper single crystal was characterized by electron backscatter diffraction (EBSD). At different strain levels, there is a clear difference in the microstructure of the deformed Cu single crystal. At low strain (20%), the deformation microstructure is mainly high-density dislocation wall. When strain is increased to 50%, microstructure, dislocation cells and dislocation cells . The differences of microstructure under different strain are mainly caused by the different deformation stages and the different slip modes of the crystals.