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

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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.

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The authors are very grateful to Marion Descoins for APT technical support. Georges Martin is acknowledged for fruitful discussions.

Author information

Author notes

  1. X.P. Tan (Research Fellow)

    Present address: School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, 639798, Singapore

Authors and Affiliations

  1. IM2NP, UMR 7334 CNRS, Université Aix-Marseille, 13397, Marseille Cedex 20, France

    X.P. Tan (Research Fellow), D. Mangelinck (CNRS Researcher) & C. Perrin-Pellegrino (Lecturer)

  2. LSMX, MXG, Ecole Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland

    L. Rougier (Doctoral Assistant) & A. Jacot (Scientist)

  3. CEMEF, UMR 7635 CNRS, Mines Paristech, 06904, Sophia Antipolis, France

    Ch.-A. Gandin (CNRS Researcher)

  4. Snecma-SAFRAN Group, Service YQGC, 92702, Colombes, France

    D. Ponsen (Research Engineer) & V. Jaquet (Research Engineer)

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  1. X.P. Tan
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  2. D. Mangelinck
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Correspondence to X.P. Tan.

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Manuscript submitted February 22, 2014.

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Tan, X., Mangelinck, D., Perrin-Pellegrino, C. et al. Spinodal Decomposition Mechanism of γ′ Precipitation in a Single Crystal Ni-Based Superalloy. Metall Mater Trans A 45, 4725–4730 (2014). https://doi.org/10.1007/s11661-014-2506-8

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  • DOI: https://doi.org/10.1007/s11661-014-2506-8

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