Analysis on dissociation of pyramidal i dislocation in magnesium by generalized-stacking-fault energy

Abstract

The generalized-stacking-fault energies are calculated to illustrate the dissociation of hci dislocation on pyramidal I plane in magnesium. The c surfaces of {1011} plane and its adjacent planes {3034} and {3032} are presented using Liu embedded-atom-method potential method, and one possible dissociation path of 1=3{1123} dislocation on {1011} plane with minimum energy is predicted. Meanwhile, another two reasonable dissociation paths of 1=3{1123} dislocation successively on {3034} and {3032} planes are also proposed. Moreover, based on molecular dynamics simulations of magnesium single crystals under c-axis compression, the possible slip path is further examined and discussed.