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Phase-Field Modeling of Precipitation Microstructure Evolution in Multicomponent Alloys During Industrial Heat Treatments

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Enhanced Material, Parts Optimization and Process Intensification (EMPOrIA 2020)

Abstract

We develop a phase-field model for the simulation of chemical diffusion limited microstructure evolution. The model is applied to γ′-precipitation under the influence of realistic multi-step aging treatments in multi-component nickel-based superalloys with industrially relevant chemical complexity. The temperature-dependent thermodynamic and kinetic input parameters are obtained from CALPHAD calculations using ThermoCalc. Further, the model accounts for the lattice-misfit between the precipitate- and the matrix-phase. The required temperature-dependent elastic stiffness and lattice-misfit can be measured using resonance ultrasound spectroscopy and high temperature X-ray diffraction, respectively. This allows to account for realistic shaping of γ′-particles in the simulation. The comparison to shapes of γ′-particles in experimental microstructures serves as an important cross validation of the model. The application of the model to investigate the effect of the subsequent aging treatment on the precipitation microstructure after a brazing process is discussed.

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Acknowledgements

We thank the German Federal Ministry for Economics and Energy (BMWi) for financially supporting the project COORETEC: ISar 03ET7047D and the German Federal Ministry of Education and Research (BMBF) for financial support in the project ParaPhase 01IH15005B. Further, this work is funded by the Deutsche Forschungsgemeinschaft (DFG) within the projects 387117768 and 431968427. Finally, we are very thankful to our collaboration partners at ACCESS, MTU Aero Engines AG and Siemens AG for the fruit-full discussions within the joint research project COORETEC: ISar.

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Correspondence to Michael Fleck .

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Fleck, M., Schleifer, F., Holzinger, M., Lin, YY., Glatzel, U. (2021). Phase-Field Modeling of Precipitation Microstructure Evolution in Multicomponent Alloys During Industrial Heat Treatments. In: Reisgen, U., Drummer, D., Marschall, H. (eds) Enhanced Material, Parts Optimization and Process Intensification. EMPOrIA 2020. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-70332-5_7

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  • DOI: https://doi.org/10.1007/978-3-030-70332-5_7

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  • Online ISBN: 978-3-030-70332-5

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