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The Effect of Interphase Boundaries on Radiation Resistance of New Low-Activation and Chromium-Nickel Stainless Steels under High-Dose Irradiation up to 200 DPA

This paper deals with the evolution of the dislocation structure, phase composition and vacancy voids in new reactor stainless steels over the temperature interval from 550 to 650 °C under irradiation with krypton ions up to high damaging doses (200 dpa). It is shown that the amount of voids formed in stainless steels exposed to irradiation with high-energy particles can be reduced by producing a high density of direct sinks of point defects in the form of α/γ phase boundaries. Compositions of radiation-resistant alloys, including low-activation ones of the Cr13Mn7W2 type having an austenitic-martensitic lath structure, have been proposed.