Void denuded zone formation for Fe-15Cr-15Ni steel and PNC316 stainless steel under neutron and electron irradiations

VDZs were formed near random grain boundaries with higher misfit angles in both Fe-15Cr-15Ni and PNC316 steels. The VDZ widths in the PNC316 stainless steel were narrower than those for the Fe-15Cr-15Ni steel for all neutron and electron irradiations. The VDZ width analysis implied that the vacancy diffusivity was reduced in PNC316 stainless steel as a result of interaction of vacancies with minor alloying elements.