Abstract
A model for the initiation of hydrogen embrittlement cracking in gaseous hydrogen environments is presented. The model is based on the stress-induced diffusion of hydrogen atoms to the regions of high triaxial stress ahead of a plastically strained notch. The influence of yield stress and notch geometry on the apparent threshold stress intensity for embrittlement are considered and derived analytically. The time dependence for crack initiation for apparent stress intensities above the threshold is derived from a simple diffusion model. The results of the model are in agreement with reported hydrogen embrittlement phenomena.
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Doig, P., Jones, G.T. A model for the initiation of hydrogen embrittlement cracking at notches in gaseous hydrogen environments. Metall Trans A 8, 1993–1998 (1977). https://doi.org/10.1007/BF02646573
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DOI: https://doi.org/10.1007/BF02646573