To the theory of the anomalously high diffusion rate in metals under shock action: I. Basic equations of diffusion mass transfer upon plastic deformation of materials

Specific features of the diffusion mass transfer in metals under impact mechanical action are considered. Diffusion fluxes that arise during intense plastic deformation of materials are determined. It is shown that under some conditions the diffusion of impurities from the external surface into the bulk of metal can proceed in the regime of a wave process, in which the mass transfer occurs in the form of a convective motion of atoms through the crystal lattice of the solid. The velocity of propagation of diffusion waves is determined.