The development of high-energy displacement cascades was investigated, for times of up to 200ps, by using molecular dynamics simulations. The latter were carried out by using a modified Finnis-Sinclair many-body interatomic potential. Simulations were made of 10keV exposure at 900K and 20keV exposure at 100K. The results indicated that the fraction of Frenkel pairs which escaped in-cascade recombination was somewhat higher, and the fraction of surviving point defects that clustered lower, in Fe than in Cu. In particular, vacancy clustering appeared to be inhibited in the present metal. Many of the interstitial clusters were observed to exhibit a complex 3-dimensional morphology. The apparent mobility of the <111> crowdion, and of clusters of <111> crowdions, was very high.

R.E.Stoller: Journal of Nuclear Materials, 1996, 233-237B, 999-1003