Radiation-induced segregation and dislocation sink-strength evolution were investigated by means of the computer simulation of solute segregation at, or near to, a grain boundary. A new continuity equation model for radiation-induced segregation was developed which was based upon rate theory and which included the simultaneous evolution of faulted dislocation loops and network dislocations. A di-interstitial was assumed to be the nucleus of a dislocation loop, and calculations were made of dislocation evolution due to the absorption of interstitials and vacancies. The effects of irradiation temperature, rate and dose upon radiation-induced segregation at a grain boundary under electron irradiation were clarified.

A Computational Study of Dislocation Evolution and Radiation-Induced Segregation at a Grain Boundary. N.Sakaguchi, S.Watanabe, H.Takahashi: Journal of Nuclear Materials, 1996, 239, 176-9