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Effect of an oxide dispersion on the hydrogen embrittlement of a Ni3Al base alloy

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Abstract

The susceptibility of a hot isostatically pressed Ni3AI, Cr, Zr alloy to hydrogen embrittlement has been studied. The base alloy and a second alloy containing 5 vol. % Y2O3 particles were tested by cathodically charging with hydrogen prior to or simultaneously with tensile testing. Embrittlement of both alloys was noted under both charging conditions, but was much more severe for simultaneous charging. Intergranular fracture due to hydrogen was noted in the base alloy, while the dispersoid-containing alloy failed along prior particle boundaries. The results are explained by a dislocation transport mechanism in which hydrogen is delivered to interior fracture sites by mobile dislocations. Much greater penetration of hydrogen is achieved under simultaneous charging conditions.

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Authors and Affiliations

  1. Materials Engineering Department, Rensselaer Polytechnic Institute, Troy, 12180-3590, New York, USA

    G. M. Camus, D. J. Duquette & N. S. Stoloff

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  1. G. M. Camus
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  2. D. J. Duquette
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  3. N. S. Stoloff
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Camus, G.M., Duquette, D.J. & Stoloff, N.S. Effect of an oxide dispersion on the hydrogen embrittlement of a Ni3Al base alloy. Journal of Materials Research 5, 950–954 (1990). https://doi.org/10.1557/JMR.1990.0950

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  • DOI: https://doi.org/10.1557/JMR.1990.0950

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