Effects of Temperature and Hydrogen on Fatigue Properties on 304L
Résumé
The design of liquid hydrogen tanks requires a thorough understanding of the factors influencing fatigue crack initiation and propagation at cryogenic temperatures in materials used in hydrogen environments. To gain a more precise understanding of the impact of hydrogen on the fatigue properties of austenitic stainless-steel alloys, this study examines its effect on fatigue strength and behaviour at different temperatures. Indeed, low temperatures raises the role of changes in the microstructure in relation with hydrogen embrittlement of these steels. The study concludes that hydrogen affects fatigue strength at ambient temperature. As for the evolution of the ratchetting deformation, no difference was noted between an air and hydrogen environment. These results will allow further steps to compare the effect of external hydrogen (in-situ tests) with that in solution (ex-situ tests).
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Proceedings_of_the_ASME_2024_PVP_CHOCHOY_Romain_HAL.pdf (834.66 Ko)
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