3D CAFE simulation of a macrosegregation benchmark experiment

Tommy Carozzani (1) , Hugues Digonnet (1) , Michel Bellet (1) , Charles-André Gandin (1)

1 CEMEF - Centre de Mise en Forme des Matériaux

A macrosegregation benchmark experiment is simulated using a three dimensional (3D) Cellular Automaton (CA) - Finite Element (FE) model. It consists of a Sn - 3 wt% Pb alloy solidified in a rectangular cavity. Thanks to tabulated thermodynamic properties and solidification paths with temperature and composition, the effect of natural convection and macrosegregation on cooling curves is correctly predicted. Nucleation parameters are adjusted so that the simulated grain structure correlates with the real grain structure. Although macrosegregation is well predicted, this is not the case for freckles yet observed in the solidified sample.

Mots clés: Solid-phase precipitation; Buoyancy-driven flows; convection; Solidification; Thermal properties; liquids

Domaines: Matériaux

Tommy Carozzani, Hugues Digonnet, Michel Bellet, Charles-André Gandin. 3D CAFE simulation of a macrosegregation benchmark experiment. MCWASP XIII, 13th Int. Conference on Modelling of Casting, Welding and Advanced Solidification Processes, Jun 2012, Schladming, Austria. 012087 - 9 p., ⟨10.1088/1757-899X/33/1/012087⟩. ⟨hal-00714100⟩