Effect of small perturbations on the evolution of polycrystalline structure during plastic deformation

Abstract

The method of molecular dynamics has been used to study the influence of initial perturbations on the evolution of grain boundaries during the shear plastic deformation of a two dimensional polycrystal line material with nanoscale grains. It has been shown that short term thermalization induced small pertur bations result in noticeable differences in grain boundaries configurations at the deformation of 0.05 and the polycrystal completely loses its initial grain boundary structure at the deformation of 0.4.

Diffusion of the atomic clusters over the (111) and(100) surfaces in Ni crystal

“…For example, molecular dynamics (MD) simulation was successfully used for the investigation of plastic deformation of polycrystals on atomistic level, studying of defect migration, energy distribution, ets. [3][4][5][6].…”