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Fatigue crack threshold and crack growth behavior of 17–4 PH steel determined with internal hydrogen by Junichiro Yamabe; Jean-Gabriel Sezgin; Kentaro Wada is a Engineering article available to read on EtoBox.

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Effect of hydrogen on the fatigue crack threshold and fatigue crack growth (FCG) behavior of 17–4 PH steel was investigated using a circumferentially notched specimen with a stress concentration factor of 6.6 precharged in a 100 MPa hydrogen gas environment. Fatigue life tests were performed in air at room temperature at a stress ratio of −1 and test frequencies of 0.001–10 Hz. Although the FCG rate was accelerated, it was discovered that the fatigue crack threshold was not degraded by the hydrogen. The H-induced FCG acceleration ratio was predicted by a new model considering cycle- and time-dependent FCGs.

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Author

Junichiro Yamabe; Jean-Gabriel Sezgin; Kentaro Wada

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Engineering (Physical Sciences)