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Phase field modeling of solidification in multi-component alloys with a case study on the Inconel 718 alloy

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Abstract

We develop a phase field model for the simulation of chemical diffusion-limited solidification in complex metallic alloys. The required thermodynamic and kinetic input information is obtained from CALPHAD calculations using the commercial software-package ThermoCalc. Within the case study on the nickel-base superalloy Inconel 718, we perform simulations of solidification with the explicit consideration of 6 different chemical elements. The stationary dendritic tip velocities as functions of the constant undercooling temperature obtained from isothermal solidification are compared with the stationary tip temperatures as functions of the imposed pulling velocity obtained during directional solidification. We obtain a good quantitative agreement between the two different velocity—undercooling functions. This indicates that the model provides a self consistent description of the solidification. Finally, the simulation results are discussed in light of experimental solidification conditions found in single crystalline casting experiments of Inconel 718.

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ACKNOWLEDGMENTS

We thank the Federal Ministry for Economics and Energy (BMWi) of the Federal Republic of Germany for the financial support under the running project COORETEC: ISar (funding code: 03ET7047D) Further, we thank the Federal Ministry of Education and Research (BMBF) for the financial support under the running project ParaPhase (funding code: 01IH15005B). Furthermore, parts of the research presented in this article have received funding from the European Union’s Seventh Framework Program (FP7/2007-2013) for the Clean Sky Joint Technology Initiative under grant agreement number 326020. Also, we thank the MTU Aero Engines AG for the fruit-full collaboration within the research project SIMCHAIN. Finally, we thank the German Research Foundation (DFG) for the financial support within the second phase of the priority program 1713.

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Authors and Affiliations

  1. Metals and Alloys, University of Bayreuth, Bayreuth, 95447, Bavaria, Germany

    Michael Fleck & Uwe Glatzel

  2. Teconsult Precision Robotics, Bayreuth, 95448, Bavaria, Germany

    Frank Querfurth

  3. Materials and Process Simulation, University of Bayreuth, Bayreuth, 95447, Bavaria, Germany

    Frank Querfurth

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  1. Michael Fleck
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  2. Frank Querfurth
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  3. Uwe Glatzel
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Correspondence to Michael Fleck.

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Fleck, M., Querfurth, F. & Glatzel, U. Phase field modeling of solidification in multi-component alloys with a case study on the Inconel 718 alloy. Journal of Materials Research 32, 4605–4615 (2017). https://doi.org/10.1557/jmr.2017.393

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