Displacement cascades with energies of up to 30keV were investigated by means of molecular dynamics simulations of α-Fe, Ni and ordered Ni3Al. Various embedded-atom potentials were used in conjunction with a modification of the short-range repulsive interaction. Interstitial clusters were found to be very mobile at any size. The direction of the dumb-bells in a cluster configuration was different when compared with that in an isolated configuration. A glide mechanism and 1-dimensional motion of these clusters were observed in various systems. Several types of cluster-cluster interaction were observed. These were the coalescence of 2 clusters having distinct glide cylinders assisted by the flip of the Burgers vector of one of the clusters, the growth of a cluster via the absorption of isolated interstitials and the elimination of vacancies which were swept by a large interstitial cluster.

Interstitial Cluster Motion in Displacement Cascades. N.V.Doan: Journal of Nuclear Materials, 2000, 283-287, 763-7