Parallel-computed molecular dynamics simulations which involved up to 54 million atoms were used to investigate the formation of vacancies by a moving jogged dissociated dislocation at low temperatures. The jog line was formed by the intersection of 2 perpendicular dislocations. It was initially oriented in the [0¯1¯1] direction, along which its motion was conservative, but immediately began to deviate towards [1¯1¯2]. Vacancies were formed behind the jog-line; either individually or in the form of tubes along [1¯1¯2] or [10¯1]. The mechanism which was responsible for the deviation of the jog line was explained in terms of dislocation energetics.

Investigation of Vacancy Formation by a Jogged Dissociated Dislocation with Large-Scale Molecular Dynamics and Dislocation Energetics. S.J.Zhou, D.L.Preston, F.Louchet: Acta Materialia, 1999, 47[9], 2695-703