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Atom probe tomography of secondary γ′ precipitation in a single crystal Ni-based superalloy after isothermal aging at 1100 °c

X.P. Tan 1 Dominique Mangelinck 1 C. 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 : Secondary γ′ precipitation in a commercial single crystal Ni-based superalloy after the 1100 °C isothermal aging has been investigated by atom probe tomography. After the isothermal aging for 300 s, 1800 s and 3600 s, a bimodal size distribution of larger primary γ′ precipitates and numerous smaller secondary γ′ precipitates was obtained. It is proposed that the secondary γ′ precipitated via a non-classical nucleation mode. The coarsening of secondary γ′ precipitates well obeys the classical LSW theory.
Keywords : Composition fluctuations Atom probe tomography Precipitation High-temperature alloys
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https://hal-mines-paristech.archives-ouvertes.fr/hal-01022688
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Submitted on : Thursday, July 10, 2014 - 4:16:19 PM
Last modification on : Wednesday, November 17, 2021 - 12:28:18 PM

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CNRS | PARISTECH | ENSMP | ENSMP_CEMEF | UNIV-AMU | INSTITUT-TELECOM | UNIV-TLN | IM2NP | PSL | LRN

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X.P. Tan, Dominique Mangelinck, C. Perrin-Pellegrino, Luc Rougier, Charles-André Gandin, et al.. Atom probe tomography of secondary γ′ precipitation in a single crystal Ni-based superalloy after isothermal aging at 1100 °c. Journal of Alloys and Compounds, Elsevier, 2014, 611, pp.389-394. ⟨10.1016/j.jallcom.2014.05.132⟩. ⟨hal-01022688⟩

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