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

Published online by Cambridge University Press:  26 October 2017

Michael Fleck Open the ORCID record for Michael Fleck [Opens in a new window] ,
Frank Querfurth  and
Uwe Glatzel
Michael Fleck*
Affiliation:
Metals and Alloys, University of Bayreuth, Bayreuth 95447, Bavaria, Germany
Frank Querfurth
Affiliation:
Teconsult Precision Robotics, Bayreuth 95448, Bavaria, Germany, and Materials and Process Simulation, University of Bayreuth, Bayreuth 95447, Bavaria, Germany
Uwe Glatzel
Affiliation:
Metals and Alloys, University of Bayreuth, Bayreuth 95447, Bavaria, Germany
*
a) Address all correspondence to this author. e-mail: michael.fleck@uni-bayreuth.de
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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.

Keywords

simulationphase transformationdirectional solidification
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 24: Focus Issue: Mechanical Properties and Microstructure of Advanced Metallic Alloys—in Honor of Prof. Haël Mughrabi PART B , 28 December 2017 , pp. 4605 - 4615
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Copyright
Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Mathias Göken

References

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