Hydrogen induced cracking mechanisms - are there critical experiments?

W. W. Gerberich, P. G. Marsh, J. W. Hoehn

Research output: Chapter in Book/Report/Conference proceedingConference contribution

73 Scopus citations

Abstract

While there are a half-dozen or more hydrogen embrittlement models, only two of these, aside from hydrides, can survive: that of hydrogen enhanced localized plasticity (HELP) and that of hydrogen enhanced decohesion (HEDE). HEDE is often favored because of the synergism between hydrogen and metalloid segregants. In terms of crack thresholds and velocities, two critical experiments are reported. The first is associated with cracks in a highly dislocated network as opposed to a sparse network and how this affects threshold. The second deals with previously untested material wherein the kinetics be utilized to predict the hydrogen effect on threshold stress intensity in single crystal NiAl.

Original languageEnglish (US)
Title of host publicationHydrogen Effects in Materials
PublisherMinerals, Metals & Materials Soc (TMS)
Pages539-551
Number of pages13
StatePublished - Jan 1 1996
EventProceedings of the 1994 5th International Conference on the Effect of Hydrogen on the Behavior of Materials - Moran, WY, USA
Duration: Sep 11 1994Sep 14 1994

Other

OtherProceedings of the 1994 5th International Conference on the Effect of Hydrogen on the Behavior of Materials
CityMoran, WY, USA
Period9/11/949/14/94

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