Anomalies in hydrogen enhanced fatigue of a high strength steel

作者：Roy A; Manna I; Chattoraj I^*

来源：International Journal of Fatigue, 2014, 59: 14-22.

DOI：10.1016/j.ijfatigue.2013.10.002

• Fatigue crack growth
• Hydrogen embrittlement
• Stress gradient
• Loading protocol
• Hydrogen diffusion

Fatigue crack growth for an HSLA steel was studied with in situ hydrogen charging. The hydrogen effect was highest at low Delta K values. The anomalies in hydrogen effect were found in the relative insensitivity of the crack growth rates to Delta K in a decreasing Delta K test protocol, and in the distinct differences of the crack growth rates for different loading protocols. These anomalies are explained by the hydrogen availability at the crack tip as a function of the test parameters. A %26quot;t%26quot; and %26quot;Delta K%26quot; based parameter was found to be universally applicable for hydrogen enhanced fatigue irrespective of loading protocol.

• 出版日期2014-2