Change in the structural state of grain boundaries under high-rate mechanical loading

The molecular-dynamic modeling of the behavior of a three-dimensional cryst allite that contains a specific-type grain boundary under shear loading is performed. It is found that the accommodation of displacements of the mater ial grains can be realized owing to structural changes in the intergrain bo undaries. The crystal-like structure of the grains can be restored after th e external action terminates. The results obtained give deeper insight into the nature of the structural response of the material under mechanical loa ding at the atomic level.