Abstract

Solute segregation in alloys and steels during irradiation has been studied both experimentally and theoretically for a number of years. In this paper, a rigorous theory for the segregation of solute in a dilute binary alloy is described which is based on the kinetic theory of diffusion. This theory is then used to predict irradiation-induced instabilities in the diffusion of the solute which cause spatial oscillations in composition. It is shown that trapping of both vacancies and interstitials at solute atoms can cause such instabilities. The results of numerical calculations are compared with experimental results.

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