Abstract

A plane strain cell model is used to analyse the development of intergranular creep fracture in polycrystalline metals at elevated temperatures. Continuous nucleation of cavities and diffusive cavity growth are accounted for in the model, and also the effect of freely sliding grain boundaries is incorporated, while the grains undergo power law creep. The numerical analyses are here mainly employed to focus on the final part of the creep rupture process, when microcracks form and start to link up.

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