The response of a bombardment-modified microstructure to deformation was studied in a model alloy which had been bombarded with 700keV Kr2+, to about 1dpa, at temperatures ranging from 523 to 873K. Various microstructures were observed, ranging from a high density of black dots to large isolated loops. When the microstructure consisted of large loops, most of the loops were found to be unfaulted after strain, and glide was localized in planes. The agglomeration of perfect loops by glide and helical screw dislocations was observed. Very few signs of pinning were detected. In 20% cold-worked AISI316L stainless steel, which had been bombarded with Kr2+ ions at 623K, changes in the dislocation cells were observed between 1 and 5dpa. None of the initial network remained at 5dpa, and small loops appeared.

L.Boulanger, F.Soisson, Y.Serruys: Journal of Nuclear Materials, 1996, 233-237B, 1004-8