Molecular dynamics based modelling of the dislocation motion in bulk nanostructuring of a FCC material

摘要

Materials nanostructuring by severe plastic deformation (SPD) have attracted much interest in the last decade due to their physical and chemical properties. During severe plastic deformation of metals, at the nanostructuring level of 50-200 nm grain size, dislocations arrange in ordered patterns and the plastic behavior is mainly controlled by the motion of crystal lattice. In order to model the motion of the deformation mechanisms, the present paper proposes the molecular dynamics method applied to copper severe plastic deformation in order to investigate the pattern of the elastic fields generated by the dislocations within the deformation.