МОДЕЛИРОВАНИЕ КИНЕТИКИ ТОЧЕЧНЫХ, ЛИНЕЙНЫХ И ПОВЕРХНОСТНЫХ ДЕФЕКТОВ И ПОРОГОВ НА ДВИЖУЩЕЙСЯ ВИНТОВОЙ И КРАЕВОЙ ДИСЛОКАЦИИ В ГЦК МЕТАЛЛАХ

Abstract

Near the surface of a deformed solid, close to irregularities and microasperities prismatic dislocation loops can nucleate and move through the crystal. This type of crystallographic slip -prismatic slip -is considered in the paper. The minimum and maximum estimates of dislocation propagation into the crystal, kinetic energy and dislocation velocity are found. At heterogeneous nucleation of dislocations under deformation inducing shear instability of the lattice we can see the formation of a near-surface dislocation structure tens or hundreds of micrometers deep, which is generated by prismatic dislocation loops.