Structural changes in 2 grain boundaries with differing natures, during electron irradiation, were investigated by using an atomic-resolution high-voltage electron microscope. It was found that the morphology of one type of grain boundary changed due to boundary movement during the irradiation, whereas another type of grain boundary did not show such structural change. On the other hand, solute segregation was induced in the vicinity of both grain boundaries. It was found that differences between the two grain boundaries, particularly the difference between grain boundary interfacial planes prior to irradiation, caused the different grain boundary migration behavior.

Atomistic Dynamic Observation of Grain Boundary Structural Changes under Electron Irradiation. N.Sakaguchi, T.Shibayama, H.Kinoshita, H.Takahashi: Journal of Nuclear Materials, 2002, 307-311[2], 1003-6