Resistivity damage rate in austenitic Fe-Cr-Ni alloys during neutron irradiation at 23K

Abstract

Resistivity damage rates have been studied in high-purity austenitic Fe-Cr-Ni solid solutions during neutron irradiation at 23K up to doses of 2.7*10¹⁸ fast neutrons per cm². The production curves have been interpreted in terms of the creation and recombination of Frenkel defects. The following values of the Frenkel pair resistivity rho _F and of the effective recombination volume v_eff have been derived: Fe 64 wt.%-Cr 16 wt.%-Ni 20 wt.% alloy, rho _F=13.9 mu Omega cm per%, v_eff=217 atomic volume; Fe 59 wt.%-Cr 16 wt.%-Ni 25 wt.% alloy, rho _F=12.9 mu Omega cm per%, v_eff=229 atomic volume.