Modeling hydrogen induced damage mechanisms in metals

W. Gerberich

Research output: Chapter in Book/Report/Conference proceedingChapter

39 Scopus citations

Abstract

Historically, there have been a half-dozen hydrogen induced degradation models proposed. A few of these have since been rejected but the remaining ones can be categorized into two. For the first general category, hydrogen enhanced decohesion (HEDE) has been promoted as hydrogen lowering the forces required for atom separation reducing the brittle fracture stress. As to the second general category, this has been identified with hydrogen enhanced localized plasticity (HELP). Here, hydrogen lowers the forces required to localize dislocation plasticity thereby reducing shear stresses for ductile fracture. The following review points out general features of each with the historical development of both experimental and theoretical milestones in each decade from the 1950s or 1960s to the present day.

Original languageEnglish (US)
Title of host publicationGaseous Hydrogen Embrittlement of Materials in Energy Technologies
Subtitle of host publicationMechanisms, Modelling and Future Developments
PublisherElsevier Inc.
Pages209-246
Number of pages38
ISBN (Print)9780857095367
DOIs
StatePublished - Jan 1 2012

Keywords

  • Decohesion
  • Decohesion modeling
  • Enhanced plasticity
  • Enhanced plasticity modeling
  • Hydrogen enhanced decohesion (HEDE)
  • Hydrogen enhanced localized plasticity (HELP)
  • Mechanism milestones

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    Gerberich, W. (2012). Modeling hydrogen induced damage mechanisms in metals. In Gaseous Hydrogen Embrittlement of Materials in Energy Technologies: Mechanisms, Modelling and Future Developments (pp. 209-246). Elsevier Inc.. https://doi.org/10.1016/B978-0-85709-536-7.50008-8