本文主要针对在塑性交形的多晶体和纳米晶体材料中,晶界向错运动伴随着位错对发射现象。通过建立能量方程,分析向错不同步发射位错对的能量条件。结果表明,不同步发射的位错对的移动距离的差值越大越有利于位错的发射,水平应力的施加对向错迁移影响较小。 In this paper, we mainly deal with the phenomenon of dislocations on the grain boundary movement in the polycrystalline and nanocrystalline materials of plasticity. By establishing the energy equation, the energy conditions of the dislocation pairs that are sent to the non-synchronization fault are analyzed. The results show that the larger the difference of the moving distance of dislocation pairs that are not synchronized is, the more favorable the dislocation emission is. The application of horizontal stress has little effect on the dislocation migration.