Comparison of hydrogen effects on alloy 600 and 690

S. Smuk*, Hannu Hänninen, Yu Jagodzinski, O. Tarasenko, P. Aaltonen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

6 Citations (Scopus)

Abstract

Hydrogen diffusivity and its interaction with dislocations were studied by the method of internal friction in Inconel 600 and 690 alloys. The values of 0.38 eV and 0.52 eV were obtained for the activation enthalpy of the hydrogen diffusion jumps in Inconel 600 and 690, respectively. The energy of hydrogen-dislocation interaction was estimated using the parameters of the hydrogen cold work internal friction peaks and found to be 0.24 eV for deformed Inconel 600 and 0.16 eV for deformed Inconel 690, respectively. It was shown that based on these values of the hydrogen-dislocation interaction and hydrogen contents typical for PWR conditions, both alloys should not be subject to the development of hydrogen enhanced localized plasticity at PWR operating temperatures. At lower temperatures Inconel 690 seems to be more resistant to hydrogen embrittlement as compared to Inconel 600. X-ray diffraction study showed that Inconel 690 is more stable with respect to the hydride phase formation, and the solubility of hydrogen is higher in it. The obtained results are discussed in terms of hydrogen-induced IGSCC in nickel-base alloys. The possible effects of hydrogen-vacancy interaction on the IGSCC development in PWR operating environments are also discussed.

Original languageEnglish
Title of host publicationProceedings of the Ninth International Symposium on Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors -
EditorsS. Bruemmer, P. Ford, G. Was, S. Breummer, P. Ford, G. Was
PublisherMINERALS, METALS AND MATERIALS SOCIETY
Pages59-68
Number of pages10
ISBN (Print)0873394755
DOIs
Publication statusPublished - Oct 1999
MoE publication typeA4 Article in a conference publication
EventInternational Conference on Environmental Degradation of Materials in Nuclear Power Systems and Water Reactors - Newport Beach, United States
Duration: 1 Aug 19995 Aug 1999
Conference number: 9

Conference

ConferenceInternational Conference on Environmental Degradation of Materials in Nuclear Power Systems and Water Reactors
Country/TerritoryUnited States
CityNewport Beach
Period01/08/199905/08/1999

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