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Poster De Conférence Année : 2005

Influence of dendrites orientation on the high-temperature oxidation behaviour of cast nickel alloys

Résumé

The local high temperature oxidation behaviour of conventionally cast metallic alloys can depend on the orientation of the dendritic structure, i.e. how grain boundaries are oriented. Such a dependence was previously observed on Co-base and Ni-base superalloys. This effect was studied here for two simple Ni-30Cr-C alloys, and two more complex Ni-30Cr-C-Ta alloys. The high temperature oxidation behaviour of cast alloys may depend on the average dendritic orientation, i.e. where and how pieces were machined in the castings. For the studied alloys, differences are often small but there are some cases for which dendritic orientation really influences the resistance against oxidation, It can be useful to always cut the samples following the same geometry and orientation to better compare cast alloys to each other.
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Dates et versions

hal-04015348 , version 1 (05-03-2023)

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  • HAL Id : hal-04015348 , version 1

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Patrice Berthod, Sébastien Noël, Emilie Guestin-Grandmougin, Lionel Aranda, Christophe Rapin, et al.. Influence of dendrites orientation on the high-temperature oxidation behaviour of cast nickel alloys. Eurocorr 2005, Sep 2005, Lisboa, Portugal. ⟨hal-04015348⟩
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