Abstract
Processes of radiation-induced separation of solid solutions in Fe-34.7 at % Ni and Fe-34.7 at % Ni-0.1 at % P alloys have been investigated at Tirr ∼ 320K. A comparative analysis of these processes upon electron (cascade-free) and neutron (cascade-inducing) irradiations has been performed. It has been shown that the efficiency of electron irradiation is higher than that of neutron irradiation. The minimum fraction of freely migrating vacancies upon neutron and electron irradiations is 0.5–0.6 and 6–9%, respectively. Upon annealing of the irradiated samples, several substages of the processes of dissociation of vacancy clusters have been observed. Their energies for activation have been determined. For both types of irradiation the presence of phosphorus increases the fraction of vacancies retained after irradiation. The efficiency of the irradiation in the realization of processes of separation is determined by the concentration of freely migrating point defects and the diffusion length of their migration to sinks.
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