HETEROGENEOUS DISLOCATION FORMATION AND SOLUTE REDISTRIBUTION NEAR GRAIN BOUNDARIES IN AUSTENITIC STAINLESS STEEL UNDER ELECTRON IRRADIATION

摘要

We investigated the radiation-induced segregation (RIS) near grain boundaries in austenitic stainless steel under electron irradiation, taking into account the simultaneous evolution of faulted dislocation loops and network dislocations. The formation of a dislocation-free zone (DLFZ) in the vicinity of the grain boundary due to in situ irradiation was observed using a high-voltage electron microscope (HVEM). Predicted temperature and dose dependencies of DLFZ formation agreed with the experimental results. The relationship between RIS and DLFZ formation near a grain boundary has been substantially clarified.