Plastic deformation of copper single crystals by simulation using X-ray Lang method and molecular dynamics

Abstract

Copper rectangular parallelepiped single crystals with a notch have been extended or compressed. In a crystal with a notch, partial dislocations were created near the tip of the notch in elongation as we expected. It is hard to see where the dislocations were created just looking the displaced positions of atoms, but by a simulation of X-ray Lang topography, the creation of dislocations was easily observed. Before creation of dislocations, some indication was quite clearly shown. For compression dislocations did not start near the tip of the notch but started uniformly on the surface, the effect of notch was minor.