Hydrogen/plasticity interactions at an axial crack in pipeline steel

M. Dadfarnia, P. Sofronis, B. P. Somerday, I. M. Robertson

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The technology of large scale hydrogen transmission from central production facilities to refueling stations and stationary power sites is at present undeveloped. Among the problems which confront the implementation of this technology is the deleterious effect of hydrogen on structural material properties, in particular at gas pressure of 15 MPa which is the desirable transmission pressure suggested by economic studies for efficient transport. To investigate the hydrogen embrittlement of pipelines, a hydrogen transport methodology for the calculation of hydrogen accumulation ahead of a crack tip in a pipeline steel is outlined. This work addresses the interaction of hydrogen with an axial crack on the inside surface of the pipe. The approach accounts for stress-driven transient diffusion of hydrogen and trapping at microstructural defects whose density evolves dynamically with deformation. The results address the effect of hydrostatic constraint, stress, and plastic strain on the time it takes for the steady state hydrogen profiles to be established.

Original languageEnglish (US)
Title of host publicationFatigue and Fracture Mechanics
Subtitle of host publication36th Volume
PublisherAmerican Society for Testing and Materials
Number of pages22
ISBN (Print)9780803134164
StatePublished - 2009
Event36th ASTM National Symposium on Fatigue and Fracture Mechanics - Tampa, FL, United States
Duration: Nov 14 2007Nov 16 2007

Publication series

NameASTM Special Technical Publication
Volume1508 STP
ISSN (Print)0066-0558


Other36th ASTM National Symposium on Fatigue and Fracture Mechanics
Country/TerritoryUnited States
CityTampa, FL


  • Diffusion
  • Elastoplasticity
  • Finite element analysis
  • Hydrogen embrittlement
  • Pipeline

ASJC Scopus subject areas

  • General Materials Science


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