Hydrogen/plasticity interactions at an axial crack in pipeline steel

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

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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 con-front 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 hy-drogen 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
JournalJournal of ASTM International
Volume5
Issue number6
DOIs
Publication statusPublished - Jun 2008
Externally publishedYes

Fingerprint

Steel
Plasticity
Hydrogen
Pipelines
Cracks
Hydrogen embrittlement
Technology
Defect density
Pressure
Crack tips
Plastic deformation
Materials properties
Plastics
Gases
Pipe
Economics

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Materials Science(all)
  • Nuclear Energy and Engineering
  • Environmental Engineering
  • Public Health, Environmental and Occupational Health

Cite this

Hydrogen/plasticity interactions at an axial crack in pipeline steel. / Dadfarnia, M.; Sofronis, Petros Athanasios; Somerday, B. P.; Robertson, I. M.

In: Journal of ASTM International, Vol. 5, No. 6, 06.2008.

Research output: Contribution to journalArticle

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