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Effects of microstructure banding on hydrogen assisted fatigue crack growth in X65 pipeline steels

Journal Article · · International Journal of Fatigue
 [1];  [1];  [1]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
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.
Research Organization:
Sandia National Laboratories (SNL-CA), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Fuel Cell Technologies Program (EE-3F)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1236479
Alternate ID(s):
OSTI ID: 1396688
Report Number(s):
SAND--2015-4917J; PII: S014211231500287X
Journal Information:
International Journal of Fatigue, Journal Name: International Journal of Fatigue Journal Issue: P3 Vol. 82; ISSN 0142-1123
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

Role of Hydrogen-Charging on Nucleation and Growth of Ductile Damage in Austenitic Stainless Steels journal May 2019
Interaction between a Macrocrack and a Cluster of Microcracks by Muskhelishvili’s Complex Potential Method journal October 2018

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