Modelling (Jun 2023)

Modelling of the Solidifying Microstructure of Inconel 718: Quasi-Binary Approximation

  • Nikolai Kropotin,
  • Yindong Fang,
  • Chu Yu,
  • Martin Seyring,
  • Katharina Freiberg,
  • Stephanie Lippmann,
  • Tatu Pinomaa,
  • Anssi Laukkanen,
  • Nikolas Provatas,
  • Peter K. Galenko

DOI
https://doi.org/10.3390/modelling4030018
Journal volume & issue
Vol. 4, no. 3
pp. 323 – 335

Abstract

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The prediction of the equilibrium and metastable morphologies during the solidification of Ni-based superalloys on the mesoscopic scale can be performed using phase-field modeling. In the present paper, we apply the phase-field model to simulate the evolution of solidification microstructures depending on undercooling in a quasi-binary approximation. The results of modeling are compared with experimental data obtained on samples of the alloy Inconel 718 (IN718) processed using the electromagnetic leviatation (EML) technique. The final microstructure, concentration profiles of niobium, and the interface-velocity–undercooling relationship predicted by the phase field modeling are in good agreement with the experimental findings. The simulated microstructures and concentration fields can be used as inputs for the simulation of the precipitation of secondary phases.

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