The phase field crystal method and Continuum Modeling are applied to study the cooperative dislocation motion of the grain boundary (GB) migration, the manner of the nucleation of the grain and of the grain growth in two dimensions (2D) under the deviatoric deformation at high temperature. Three types of the nucleation modes of new finding are observed by the phase field crystal simulation: The first mode of the nucleation is generated by the GB splitting into two sub-GBs; the second mode is of the reaction of the sub-GB dislocations, such as, the generation and annihilation of a pair of partial Frank sessile dislocation in 2D. The process can be considered as the nucleation of dynamic recrystallization; the third mode is caused by two oncoming rows of the dislocations of these sub-GBs, crossing and passing each other to form new gap which is the nucleation place of the new deformed grain. The research is shown that due to the nucleation of different modes the mechanism of the grain growth by means of the sub-GB migration is different, and therefore, the grain growth rates are also different. Under the deviatoric deformation of the applied biaxial strain, the grain growth is faster than that of the grain growth without external applied stress. It is observed that the cooperative dislocation motion of the GB migration under the deviatoric deformation accompanies with local plastic flow and the state of the stress of the system changes sharply. When the system is in the process of recrystallized grain growth, the system energy is in an unstable state due to the release of the strain energy to cause that the reverse movement of the plastic flow occurs. The area growth of the deformed grain is approximately proportional to the strain square and also to the time square. The rule of the time square of the deformed grain growth can also be deduced by establishing the continuum dynamic equation of the biaxial strain-driven migration of the GB. The copper metal is taken as an example of the calculation, and the obtained result is a good agreement with that of the experiment.

应用相场晶体方法和连续谱模型研究了高偏斜变形下晶界（GB）迁移的协同位错运动，晶粒成核方式和二维（2D）晶粒长大的方式。温度。通过相场晶体模拟观察到三种新发现的成核模式：第一种成核模式是通过将GB分成两个子GB生成的；第二种模式是亚GB位错的反应，例如在二维中一对弗兰克无柄无位位错对的产生和an灭。该过程可以看作是动态再结晶的成核过程。第三种模式是由这些子GB的错位的两个即将到来的行引起的，彼此交叉并通过以形成新的间隙，该间隙是新变形晶粒的成核位置。研究表明，由于成核方式的不同，亚GB迁移导致的晶粒长大机理不同，因此晶粒长大速度也不同。在施加的双轴应变的偏斜变形下，晶粒的生长比没有外部施加应力的晶粒的生长快。可以看出，在偏斜变形下，GB迁移的协同位错运动伴随着局部塑性流动，系统的应力状态急剧变化。当系统处于重结晶晶粒生长过程中时，由于应变能的释放，系统能量处于不稳定状态，从而引起塑性流的反向运动。变形晶粒的面积增长与应变平方以及时间平方近似成比例。也可以通过建立GB的双轴应变驱动迁移的连续动力学方程来推导变形晶粒长大的时间平方的规则。以铜金属为例进行计算，所得结果与实验结果吻合良好。也可以通过建立GB的双轴应变驱动迁移的连续动力学方程来推导变形晶粒长大的时间平方的规则。以铜金属为例进行计算，所得结果与实验结果吻合良好。也可以通过建立GB的双轴应变驱动迁移的连续动力学方程来推导变形晶粒长大的时间平方的规则。以铜金属为例进行计算，所得结果与实验结果吻合良好。