Analysis on Dissociation of Pyramidal I Dislocation in Magnesium by Generalized-Stacking-Fault Energy

The generalized-stacking-fault energies are calculated to illustrate the dissociation of〈c＋a〉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.