Scaling laws governing the growth and interaction of equiaxed Al-Cu dendrites: A study combining experiments with phase-field simulations
| Autor: | Jean-Marc Debierre, Ahmed Kaci Boukellal, Guillaume Reinhart, Henri Nguyen-Thi |
|---|---|
| Přispěvatelé: | Institut des Matériaux, de Microélectronique et des Nanosciences de Provence (IM2NP), Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), GDR 2799 Micropesanteur Fondamentale & Appliquée |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Equiaxed crystals
[PHYS]Physics [physics] Scaling law Materials science Field (physics) Dynamics (mechanics) 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology 01 natural sciences Phase (matter) 0103 physical sciences General Materials Science 010306 general physics 0210 nano-technology Grain structure |
| Zdroj: | Materialia Materialia, 2018, 1, pp.62-69. ⟨10.1016/j.mtla.2018.04.008⟩ |
| DOI: | 10.1016/j.mtla.2018.04.008⟩ |
| Popis: | International audience; We report on equiaxed dendritic growth in solidifying Al-Cu alloys, particularly the interactions between the dendrites that ultimately form the grain structure in the solid. A three-dimensional phase-field code is designed to reproduce the same conditions as the ones imposed in the experiments. Our numerical results allow us to propose scaling laws that govern the dynamics of dendritic primary arms, with the solute composition and the average distance between two nuclei as physical parameters. These laws are used to extrapolate our numerical results to the experimental situation where phase-field simulations are beyond reach. Good quantitative agreement is found between the predicted behavior and the experimental observations, which validates the scaling laws obtained. |
| Databáze: | OpenAIRE |
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