The effect of a non uniform void distribution on grain boundary void growth during creep

The effect of the distribution of voids over a grain boundary facet, on the void growth process, has been modelled. Assuming the grains to behave as rigid slabs which move apart during cavitation at a uniform rate, any non-uniformity of void spacing results in stress redistribution over the facet. The net result is a decrease in the overall damage rate compared to that expected for a uniform array at the same damage level, and a large variation …