International Hydrogen Conference (IHC 2012): Hydrogen-Materials Interactions
39 Fatigue Crack Initiation in Hydrogen-Precharged Austenitic Stainless Steel
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Hydrogen-assisted fatigue is a significant concern in hydrogen fueling infrastructure. Generally accepted testing procedures to evaluate the initiation of fatigue cracks in structural materials have not been established, particularly in hydrogen environments. Additionally, there is need to develop methods that accelerate testing in materials that may experience on the order of tens of thousands of cycles over many years. This task may be especially challenging in materials where the kinetics of hydrogen transport are very slow, such as austenitic stainless steels. In this study, hydrogen precharging is used to saturate a stable austenitic stainless steel with hydrogen prior to axial...