Hydrogen/plasticity interactions at an axial crack in pipeline steel

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

研究成果: ジャーナルへの寄稿学術誌査読

1 被引用数 (Scopus)

抄録

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.

本文言語英語
ジャーナルJournal of ASTM International
5
6
DOI
出版ステータス出版済み - 6月 2008
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 工学(全般)
  • 材料科学(全般)
  • 原子力エネルギーおよび原子力工学
  • 環境工学
  • 公衆衛生学、環境および労働衛生

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