Oscillations of the density of atoms in the vicinity of symmetrical grain boundaries in metals

Abstract

Oscillatory atomic relaxation in symmetrical grain boundaries in metals is investigated by molecular-dynamics methods. It is found that the density of atoms varies nonmonotonically in various metastable grain boundaries and that the amplitude, period, and character of damping of the oscillations are virtually the same in these boundaries. A continuum model is proposed for surface layer deformation produced by linear distributed forces and is shown to adequately describe oscillatory grain-boundary relaxation.