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Fatigue Testing of Pipeline Welds and Heat-Affected Zones in Pressurized Hydrogen Gas



Elizabeth S. Drexler, Andrew J. Slifka, Robert L. Amaro, Jeffrey W. Sowards, Matthew J. Connolly, May L. Martin, Damian S. Lauria


Several welds and associated heat-affected zones (HAZs) on two API X70 and two API X52 pipes were tested to determine the fatigue crack growth rate (FCGR) in pressurized hydrogen gas and assess the area of the pipe that was most susceptible to fatigue when subjected to hydrogen gas. The relationship between FCGRs for welds and HAZs compared to base metal is discussed relative to local residual stresses, differences in the actual path of the crack, and hydrogen pressure effects.
Journal of Research (NIST JRES) -


fatigue crack growth rate, high-pressure hydrogen, hydrogen embrittlement, pipe steels, residual stress
Created April 26, 2019