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Booth-Morrison, Christopher; Noebe, Ronald D.; Seidman, David N. |
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Publication |
Effects of a tantalum addition on the morphological and compositional evolution of a model Ni-Al-Cr superalloy |
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Journal Article |
Pages |
2008 |
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Abstract |
Proceedings of the 11th International Symposium on Superalloys |
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Proceedings of the 11th International Symposium on Su |
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Summary Language |
73-79 |
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Abbreviated Series Title |
The effects of a 2.0 at.% addition of Ta to a model Ni-Al-Cr
superalloy aged at 1073 K are assessed using scanning electron
microscopy and atom-probe tomography. The addition of Ta
results in appreciable strengthening, and the morphology is found
to evolve from a bimodal distribution of spheroidal precipitates, to cuboidal precipitates aligned along the elastically soft <001>-type directions. Tantalum is observed to partition preferentially to the γ’-precipitate phase and decreases the mobility of Ni in the γ-matrix sufficiently to cause an accumulation of Ni on the γ-matrix side of the γ’-precipitate/γ-matrix heterophase interface. |
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The Minerals, Metals and Materials Society (TMS) |
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Warrendale, PA |
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Call Number |
Reed, R.C.; Green, K.A.; Caron, P.; Gabb, T.P.; Fahrmann, M.G.; Huron, E.S.; Woodard, S.A. |
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NU @ c-booth @ |
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10481 |
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