It was recalled that it had been shown that defect accumulation under cascade damage conditions could be treated within the framework of production bias models which were based upon the intra-cascade clustering of point defects, differences in the thermal stabilities of the resultant clusters and the 1-dimensional diffusion of interstitial clusters. Various aspects of defect accumulation, such as a high swelling-rate at low dislocation densities, an enhanced swelling near to grain boundaries, and the effects of grain size, irradiation dose and recoil energy upon void-swelling had been treated quantitatively within this framework. The problem of differences in the defect accumulation behaviours of face-centered cubic and body-centered cubic metals under cascade damage conditions was addressed here, and Cu and Mo were chosen to represent face-centered cubic and body-centered cubic metals, respectively. A large amount of experimental information existed concerning these metals, and the damage accumulation behaviour in Cu could be fully accounted for in terms of the production bias model. An analysis of published experimental observations in terms of the production bias model raised questions about the differences between the reaction kinetics of 1-dimensionally diffusing interstitial clusters with sinks in face-centered cubic and body-centered cubic metals. The effect of various frequencies of change, in the 1-dimensional diffusion direction of such clusters, upon their reaction kinetics was considered. The present work provided a suitable framework for generalizing the production bias model so as to treat damage accumulation in metals and alloys in general; including the formation of void superlattices.

Defect Accumulation in FCC and BCC Metals and Alloys under Cascade Damage Conditions - Towards a Generalisation of the Production Bias Model. S.I.Golubov, B.N.Singh, H.Trinkaus: Journal of Nuclear Materials, 2000, 276, 78-89