Effects of microstructure banding on hydrogen assisted fatigue crack growth in X65 pipeline steels [electronic resource].

Published:: Washington, D.C. : United States. Office of the Assistant Secretary of Energy Efficiency and Renewable Energy, 2015.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description:: pages 497-504 : digital, PDF file
Additional Creators:: Sandia National Laboratories, United States. Office of the Assistant Secretary of Energy Efficiency and Renewable Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

Banded ferrite-pearlite X65 pipeline steel was tested in high pressure hydrogen gas to evaluate the effects of oriented pearlite on hydrogen assisted fatigue crack growth. Test specimens were oriented in the steel pipe such that cracks propagated either parallel or perpendicular to the banded pearlite. The ferrite-pearlite microstructure exhibited orientation dependent behavior in which fatigue crack growth rates were significantly lower for cracks oriented perpendicular to the banded pearlite compared to cracks oriented parallel to the bands. Thus the reduction of hydrogen assisted fatigue crack growth across the banded pearlite is attributed to a combination of crack-tip branching and impeded hydrogen diffusion across the banded pearlite.

Report Numbers:

E 1.99:sand--2015-4917j
sand--2015-4917j

Subject(s):

Materials Science

Other Subject(s):

Note:

Published through SciTech Connect.
09/10/2015.
"sand--2015-4917j"
": S014211231500287X"
International Journal of Fatigue 82 P3 ISSN 0142-1123 AM
Joseph A. Ronevich; Brian P. Somerday; Chris W. San Marchi.

Funding Information:

AC04-94AL85000

View MARC record | catkey: 24065499