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Investigating Fatigue Crack Growth Rate of Ferritic Steels in High Pressure Hydrogen Gas

Fatigue crack growth rate (FGCR) is essential knowledge for the design of high-pressure hydrogen storage vessels, which are subject to repeated pressurization and depressurization cycles. High strength, low alloy steels are widely used for this application. However, these materials are known to be sensitive to hydrogen assisted cracking, meaning their crack growth rate under repeated cycles of pressurization and depressurization is significantly enhanced due to the interaction of hydrogen gas with the metal, compared to an inert environment. This work reviews existing literature on commonly used low alloy, quenched and tempered (Q&T) steels. Additionally, recently generated data on very high strength low alloy grades, as well as low carbon, low alloy, weldable steels are presented in comparison. These results illustrate common trends and similarities for FCGR in hydrogen gas and discuss differences in alloy design and manufacturing process parameters affecting materials performance in the target environment.
Product Number: 51324-20692-SG
Author: P. Bortot; M. Ortolani; M. Bellingardi; C. San Marchi; J. Ronevich
Publication Date: 2024
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