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Comparison of hydrogen embrittlement in three pipeline steels in high pressure gaseous hydrogen environments

Published

Author(s)

Nicholas Nanninga, Yaakov Levy, Elizabeth S. Drexler, Ryan Condon, April Stevenson, Andrew J. Slifka

Abstract

The tensile properties of API-5L grades X52, X65, and X100 pipeline steels have been measured in a high pressure (13.8 MPa) hydrogen gas environment. Significant losses in elongation to failure and reduction in area were observed when testing in hydrogen as compared with air, and those changes were accompanied by noticeable changes in fracture morphology. For hydrogen charged specimens, surface crack initiation and growth was the primary failure mechanism. Specimens tested in air exhibited typical ductile cup-and-cone failures. In addition to baseline characterization of the effects of strength and microstructure, the influence of strain rate and hydrogen gas pressure were studied for the X100 alloy. Losses in ductility were observed with increases in pressure and decreases in strain rate, but the influence of these variables on hydrogen embrittlement decreased at higher pressure and low strain rates.
Citation
International Journal of Hydrogen Energy
Volume
59

Keywords

Hydrogen, Gas, Pipeline, Steel, Embrittlement

Citation

Nanninga, N. , Levy, Y. , Drexler, E. , Condon, R. , Stevenson, A. and Slifka, A. (2012), Comparison of hydrogen embrittlement in three pipeline steels in high pressure gaseous hydrogen environments, International Journal of Hydrogen Energy, [online], https://doi.org/10.1016/j.corsci.2012.01.028 (Accessed April 20, 2024)
Created February 15, 2012, Updated November 10, 2018