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Hydrogen effects on fatigue strength of a High Strength Low Alloy steel
Last modified: 2013-06-27
Abstract
The results obtained in an experimental study, aimed at characterizing the effects of hydrogen
content on fatigue behavior of High Strength Low Alloy steels candidates for advanced hydrogen storage tanks
manufacturing, are presented. Tests were conducted, both on hydrogen previously charged and virgin material
specimens. Results indicates the hydrogen tend to mainly affect the crack propagation, rather than the crack
initiation stage, with nearly no effect on fatigue limit. Such results were also confirmed by SEM observations of
fracture surfaces, showing the presence of several “secondary cracks” in hydrogen charged specimens.
content on fatigue behavior of High Strength Low Alloy steels candidates for advanced hydrogen storage tanks
manufacturing, are presented. Tests were conducted, both on hydrogen previously charged and virgin material
specimens. Results indicates the hydrogen tend to mainly affect the crack propagation, rather than the crack
initiation stage, with nearly no effect on fatigue limit. Such results were also confirmed by SEM observations of
fracture surfaces, showing the presence of several “secondary cracks” in hydrogen charged specimens.
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