Convection effect on solidification microstructure: dendritic arm spacing and microsegregation
Department of Theoretical and Mathematical Physics, Laboratory of Multi-Scale Mathematical Modeling, Ural Federal University, 620000, Ekaterinburg, Russia
2 Faculty of Physics and Astronomy, Friedrich-Schiller-Universität-Jena, Otto Schott Institute of Materials Research, 07743, Jena, Germany
Accepted: 26 April 2023
Published online: 30 May 2023
Convection affect primary crystalline structure, particularly, the dendrite crystal velocity and dendrite tip radius. The present work aims on the influence of the convective flow on the primary dendrite spacing between neighbouring crystals within the dendrite ensemble. Solidification of a binary alloy is considered within the model of stagnant boundary layer, under imposed thermal gradient which influence on the crystal microstructure and chemical microsegregation. Chemical composition in the solidifying liquid and crystalline solid is derived from the solution of the solute diffusion transport equation taking into account the convective flow. The model results are consistent with the Scheil-Brody-Flemings model, experimental data and computational results.
© The Author(s) 2023
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