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On the correlation between self-interstitial cluster diffusivity and irradiation-induced swelling in Fe-Cr alloys

par Malerba, Lorenzo;Terentyev, Dimitri ;Barashev, Alexander A.V.
Référence Philosophical magazine letters, 85, 11, page (587-594)
Publication Publié, 2005-11

Article révisé par les pairs

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Résumé :

It is shown that the dependence of self-interstitial cluster diffusivity in Fe-Cr alloys on Cr concentration correlates with that of swelling in these alloys under neutron irradiation; namely, with increasing chromium concentration the cluster diffusivity first decreases and then increases. The origin of such behaviour lies in a relatively long-ranged, 1nm, attractive interaction between Cr atoms and crowdions. The minimum diffusivity is realized for 11at.% Cr, where all crowdions constituting the cluster interact with Cr atoms, but the interaction fields of different Cr atoms do not overlap.