Dislocation dynamics in the polycrystal in the presence of disclination wall

Abstract

In this work, we considered the influence of disclinations on the evolution of dislocation structures in the neighboring grain. It was shown that powerful disclinations cause of dislocation walls and increase the number of dislocations and regulating structure in neiboing grains. Stress-strain curves were obtained, the energy of motion and the number of dislocations, depending on the power of disclination in the neighboring grain. It is shown that in the presence of some power dislocations wall in process of deformation the dislocation structure rebuilt: from chaotically located dislocation (or dipol) and formation dislocation pile-up to formation powerfull curved dislocation pile-up. Full text download