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Effects of microstructure banding on hydrogen assisted fatigue crack growth in X65 pipeline steels
- Source :
- International Journal of Fatigue. 82:497-504
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- 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. 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.
- Subjects :
- Materials science
Carbon steel
Hydrogen
Mechanical Engineering
Metallurgy
chemistry.chemical_element
02 engineering and technology
Paris' law
engineering.material
021001 nanoscience & nanotechnology
Microstructure
Industrial and Manufacturing Engineering
Crack closure
020303 mechanical engineering & transports
0203 mechanical engineering
chemistry
Mechanics of Materials
Modeling and Simulation
Perpendicular
engineering
High pressure hydrogen
General Materials Science
Composite material
Pearlite
0210 nano-technology
Subjects
Details
- ISSN :
- 01421123
- Volume :
- 82
- Database :
- OpenAIRE
- Journal :
- International Journal of Fatigue
- Accession number :
- edsair.doi...........554aad1f8c3d221552f857481106462c