For understanding the macroscopic mechanical property of polycrystalline metal from a microscopic point of view, analysis of interaction between grain boundary and dislocations were very important. In particular, the driving force of each dislocation had to be evaluated precisely, to apply the dislocation dynamics method to the plastic deformation analysis. While the driving force for the grain rotation was estimated as the gradient of the function of grain boundary energy with respect to the misorientation angle, grain-boundary/dislocation interactions were very important to understand grain rotation mechanism from a microscopic viewpoint. In this paper, generalized grain boundary energy of grain-boundary/dislocation system was evaluated by using the extended finite element method with solving the problem of dislocation - disclination system. First, the comparison between the results of disclination model and atomistic model was discussed. Then, the strain energy of the grain-boundary/dislocation system was studied to evaluate the driving force of the dislocation motion.

Analysis of Interaction Between Dislocation and Grain Boundary by Using a Lattice Defect Model. A.Nakatani: Procedia Engineering, 2011, 10, 1047-52