A Fe-16Cr-17Ni alloy and two P-containing alloys (Fe-16Cr-17Ni-0.024P, Fe-16Cr-17Ni-0.1P) were irradiated. In one case, interstitial-type dislocation loops were formed in addition to voids. In another case, stacking fault tetrahedra were formed in addition to the voids. On the basis of the rate theory of defect processes under irradiation, it was suggested that the interstitial loops were nucleated by a short neutron exposure while the stacking-fault tetrahedra formed as agglomerates of vacancies and small clusters; which accumulated in the matrix as a result of a balance of interstitials and vacancies under irradiation.

H.Watanabe, T.Muroga, N.Yoshida: Journal of Nuclear Materials, 1994, 217[1-2], 178-86