:系统研究了循环变形铜单晶体中的宏观形变带的产生规律和特征以及相应的位错结构 ,并对其形成机制进行了综合探讨。结果表明 ,形变带的形成可能与循环加载中产生的晶体不可逆旋转和宏观应力状态密切相关。对于不同取向铜单晶体 ,形变带可能具有很不相同的位错结构 : The rules and characteristics of macroscopic deformation bands in cyclic deformation single crystals and the corresponding dislocation structures were systematically studied, and the formation mechanism was discussed. The results show that the formation of deformation zone may be closely related to the irreversible rotation of crystals and the macro-stress state produced by cyclic loading. For different orientation of single crystal copper, the deformation zone may have very different dislocation structure