An investigation was made of radiation-induced segregation near to grain boundaries in austenitic stainless steel under electron irradiation. Account was taken of the simultaneous evolution of faulted dislocation loops and network dislocations. The formation of a dislocation-free zone in the vicinity of the grain boundary, due to in situ irradiation, was observed by using a high-voltage electron microscope. The predicted temperature and dose dependences of dislocation-free zone formation agreed with experimental results. The relationship between radiation-induced segregation and dislocation-free zone formation was greatly clarified.

Heterogeneous Dislocation Formation and Solute Redistribution Near Grain Boundaries in Austenitic Stainless Steel under Electron Irradiation. N.Sakaguchi, S.Watanabe, H.Takahashi: Acta Materialia, 2001, 49[7], 1129–37