Hydrogen-enhanced localized plasticity-a mechanism for hydrogen-related fracture

H. K. Birnbaum, P. Sofronis

Research output: Contribution to journalArticlepeer-review

Abstract

The mechanisms of hydrogen-related fracture are briefly reviewed and a few evaluative statements are made about the stress-induced hydride formation, decohesion, and hydrogen-enhanced localized plasticity mechanisms. A more complete discussion of the failure mechanism based on hydrogen-enhanced dislocation mobility is presented, and these observations are related to measurements of the macroscopic flow stress. The effects of hydrogen-induced slip localization on the measured flow stress is discussed. A theory of hydrogen shielding of the interaction of dislocations with elastic stress centres is outlined. It is shown that this shielding effect can account for the observed hydrogen-enhanced dislocation mobility.

Original languageEnglish (US)
Pages (from-to)191-202
Number of pages12
JournalMaterials Science and Engineering A
Volume176
Issue number1-2
DOIs
StatePublished - Mar 31 1994

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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