WHAT SIMULATIONS SUGGEST ON DEFORMATION MECHANISM IN NC-METALS

摘要

Suggestions from large-scale molecular dynamics computer simulations on the deformation mechanism at the atomic level in nanocrystalline fee metals are summarized. The simulations suggest the presence of inter-grain deformation processes such as grain boundary (GB) sliding as well as intra-grain deformation processes by means of dislocations emitted from grain boundaries. It is shown that these dislocations are traveling through the grain and are either absorbed in opposite grain boundaries, or transmitted, depending on the GB misorientation.