Abstract
AbstractThe strength of a void in h.c.p. lattices for the trapping of vacancies and interstitials is calculated. An analytic solution for the diffusion equation of point defects is used. The resulting expressions can be introduced in rate theory models, for simulating the performance of nuclear reactor components. The effect of a stress field on the anisotropic diffusion of vacancies and interstitials is studied. A discrete lattice approximation is used for calculating the elastodiffusion tensors. The dependence of the void sink strength on the anisotropy diffusivity ratio, Dc/Da, is studied. It is concluded that the anisotropy in the diffusion plays a fundamental role in the behaviour of spherical sinks.
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