Small-angle neutron scattering in neutronirradiated Fe-Cr alloys

The objectives are to report data for Fe2.5Cr, Fe5Cr, Fe9Cr, Fe12Cr irradiated up to 0.06, 0.6, 1.5 dpa; to calculate nuclear scattering from features reported by Kuksenko et al. based on APT; and to compare with measured nuclear SANS. We have found that the NiSi-enriched clusters observed by APT are not responsible for the observed SANS intensities. Possible sources of the apparent discrepancy between SANS and APT for Fe12Cr are discussed. The dominant source is the overestimation of the Fe fraction in the Cr-rich clusters by APT.