Composition dependence of defect properties in electron-irradiated Fe-Cr-Ni solid solutions

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Abstract
Austenitic Fe-16 wt.% Cr-20-45 wt.% Ni alloys have been studied by electrical resistivity measurements during 21K electron irradiation and during subsequent anneals. The Frenkel-pair resistivity and the activation enthalpy for interstitial and vacancy migration have been evaluated in the 16-45 alloy. An increase in nickel concentration results in a strongly increased interstitial mobility, a slightly reduced vacancy mobility and a smaller vacancy formation enthalpy. Self-interstitials interact strongly with silicon atoms and weakly with titanium atoms. Vacancy mobility is more affected by titanium than by silicon.