Effect of hydrogen on void production in nickel

Samples of high purity nickel were preinjected with hydrogen at 25°C and subsequently irradiated with 14 MeV nickel ions at 525°C. The resulting microstructure was examined by transmission electron microscopy analysis utilizing a transverse sectioning technique which allowed examination throughout t...

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Bibliographic Details
Published in:Journal of nuclear materials 1985-01, Vol.133, p.455-458
Main Authors: Bullen, D.B., Kulcinski, G.L., Dodd, R.A.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Other techniques and industries
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Summary:Samples of high purity nickel were preinjected with hydrogen at 25°C and subsequently irradiated with 14 MeV nickel ions at 525°C. The resulting microstructure was examined by transmission electron microscopy analysis utilizing a transverse sectioning technique which allowed examination throughout the entire 3 micrometer range of the bombarding ion. It was found that approximately 1–10 appm of hydrogen had a major effect on the production of voids. The hydrogen increased the swelling by a factor of 5 at the 10 appm level over the entire 25 dpa range studied as compared to a similar hydrogen free sample. It is evident from this study that any nickel component in a fusion reactor which is exposed to hydrogen (e.g., through discharge cleaning) prior to operation of the reactor, will be very susceptible to enhanced swelling and possibly reduced mechanical performance.
ISSN:0022-3115
1873-4820
DOI:10.1016/0022-3115(85)90188-6