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Spinodal Decomposition Mechanism of γ′ Precipitation in a Single Crystal Ni-Based Superalloy

X.P. Tan 1 Dominique Mangelinck 1 Carine Perrin-Pellegrino 1 Luc Rougier 2 Charles-André Gandin 3 Alain Jacot 2 Damien Ponsen 4 Virginie Jaquet 4
1 IM2NP - Institut des Matériaux, de Microélectronique et des Nanosciences de Provence
2 STI IMX LSMX
3 CEMEF - Centre de Mise en Forme des Matériaux
4 Service YQGC
Abstract : The precipitation of γ′ phase in a commercial single crystal Ni-based superalloy with different cooling rates has been investigated by atom probe tomography. Numerous irregular interconnected γ′ precipitates in the size range of ~30 to 50 nm were obtained even utilizing the fastest possible cooling rate. Diffuse γ/γ′ interface and far from equilibrium composition of γ′ phase were observed in the fast-cooled sample, suggesting that γ′ precipitation occurs via a spinodal decomposition at the very early stage.
Keywords : Nanotechnology Thin Films Structural Materials Surfaces and Interfaces Metallic Materials Characterization and Evaluation of Materials
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https://hal-mines-paristech.archives-ouvertes.fr/hal-01058164
Contributor : Magalie Prudon <>
Submitted on : Tuesday, August 26, 2014 - 11:20:57 AM
Last modification on : Sunday, January 3, 2021 - 4:46:02 PM

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X.P. Tan, Dominique Mangelinck, Carine Perrin-Pellegrino, Luc Rougier, Charles-André Gandin, et al.. Spinodal Decomposition Mechanism of γ′ Precipitation in a Single Crystal Ni-Based Superalloy. Metallurgical and Materials Transactions A, Springer Verlag/ASM International, 2014, 45 (11), pp.4725-4730. ⟨10.1007/s11661-014-2506-8⟩. ⟨hal-01058164⟩

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