Anomalies in hydrogen enhanced fatigue of a high strength steel

Roy, A and Manna, I and Chattoraj, I (2014) Anomalies in hydrogen enhanced fatigue of a high strength steel. International Journal of Fatigue, 59 (IF-1.730). pp. 14-22.

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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 "t" and "Delta K" based parameter was found to be universally applicable for hydrogen enhanced fatigue irrespective of loading protocol. (C) 2013 Elsevier Ltd. All rights reserved

Item Type:Article
Official URL/DOI:
Uncontrolled Keywords:Fatigue crack growth; Hydrogen embrittlement; Stress gradient; Loading protocol; Hydrogen diffusion
Divisions:Business Development and Monitoring
ID Code:6822
Deposited By:Sahu A K
Deposited On:27 Jan 2014 16:14
Last Modified:04 May 2016 14:51
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