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

Published online by Cambridge University Press:  31 January 2011

G.M. Camus ,
D.J. Duquette  and
N.S. Stoloff
G.M. Camus
Affiliation:
Materials Engineering Department, Rensselaer Polytechnic Institute, Troy, New York 12180–3590
D.J. Duquette
Affiliation:
Materials Engineering Department, Rensselaer Polytechnic Institute, Troy, New York 12180–3590
N.S. Stoloff
Affiliation:
Materials Engineering Department, Rensselaer Polytechnic Institute, Troy, New York 12180–3590
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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.

Type
Articles
Information
Journal of Materials Research , Volume 5 , Issue 5 , May 1990 , pp. 950 - 954
Copyright
Copyright © Materials Research Society 1990

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References

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