Abstract
From a macroscopic point of view, the driving force for the grain rotation is estimated as the gradient of the function of grain boundary (GB) energy with respect to the misorientation angle. On the other hand, from a microscopic viewpoint, GB-dislocation interactions are very important to understand grain rotation mechanism. In this paper, generalized GB energy of GB-dislocation system is defined and the extended finite element method is applied to study the system. First, the comparison between the results of disclination model and atomistic model is discussed. Then, the strain energy of the GB-dislocation system is studied to evaluate the driving force of the dislocation motion.
