International Hydrogen Conference (IHC 2012): Hydrogen-Materials Interactions
37 Fatigue Crack Growth Under High Pressure of Gaseous Hydrogen: Experiments and Modeling
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This paper presents the preliminary results of a study addressing the effect of high pressure of gaseous hydrogen on fatigue crack growth in steels from an experimental and modeling point of view. Fatigue crack growth tests were carried out under a pressure of 0.9 and 9 MPa on a martensitic steel using a specially designed test bench. A fatigue crack growth enhancement, dependent on hydrogen pressure and loading frequency and associated with typical changes in fracture modes, is observed. Meanwhile, a model based on coupled effects of mechanical loading and hydrogen diffusion on the traction-separation law of a specific cohesive...