Evolution of Small Dislocation Loop during Deformation

In this study, an MD simulation of compression process was carried out for copper. An interstitial type dislocation loop was inserted in a perfect copper lattice, and then the lattice was deformed in a displacement-controlled manner. Slipping of prismatic dislocation were not observed for all simulation cases, for loops smaller than 0.6nm, atoms in loop were squeezed into the neighboring layer and form a crowdion bundle along <110> direction, which was then swept away by further deformation, for loops larger than 2nm, the inhabit plane was firstly inclined to bridge two neighboring layer and the former extrinsic stacking was broken into two parts with an intrinsic stacking in two successive plane, after this transformation, the deformation was accommodated by sequential slipping on these two successive planes respectively.