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 centers is outlined. It is shown that this shielding effect can account for the observed hydrogen enhanced dislocation mobility.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
TAM R 714
1993-6012
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/112402
Copyright and License Information
Copyright 1993 Board of Trustees of the University of Illinois
TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.
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