PLASTIC CREEP FLOW EFFECTS IN THE DIFFUSIVE CAVITATION OF GRAIN-BOUNDARIES
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The authors analyze the growth of cavities along grain interfaces by the combined processes of grain boundary diffusion and plastic dislocation creep in the adjoining grains. The coupling between the processes can be expressed in terms of a parameter L, which has the dimensions of length and which is a function of material properties, temperature and applied stress. Cavity growth rates are presented for a wide range of ratios of L to cavity spacing, and of cavity radius to spacing. Results are also presented for the total growth time from an initial size to final coalescence.