Modeling of Macrosegregation and Solidification Grain Structures with a Coupled Cellular Automaton-Finite Element Model

DOI Web Site 4 Citations 68 References
  • Guillemot Gildas
    CEMEF UMR CNRS 7635, Ecole des Mines LSG2M UMR CNRS 7584, Ecole des Mines LMPGM UMR CNRS 8517, Ecole d'Arts et Métiers
  • Gandin Charles-André
    CEMEF UMR CNRS 7635, Ecole des Mines LSG2M UMR CNRS 7584, Ecole des Mines
  • Combeau Hervé
    LSG2M UMR CNRS 7584, Ecole des Mines

Search this article

Abstract

A coupled Cellular Automaton (CA)–Finite Element (FE) model is presented for the prediction of solidification grain structures coupled with the calculation of solid and liquid flow induced macrosegregation. The model is applied to simulate the solidification of a Pb–48wt%Sn alloy in a rectangular cavity cooled down from only one of its vertical boundaries. The algorithm and the numerical implementation of the coupling between the CA and FE methods are first validated by considering a single grain developing with no undercooling. Such a CAFE simulation is shown to retrieve the solution of a purely FE method simulation for which the grain structure is not accounted for. Several applications of the model are then presented to quantify the effects of the grain structure on the final macrosegregation map. In particular, the effect of the undercooling of the columnar front, the presence of equiaxed grains nucleated in the undercooled liquid, as well as the transport and sedimentation of equiaxed grains are investigated. Although good validation is reached when comparing computed and measured segregation profiles available in the literature for the chosen configuration, it is concluded that refined experimental data are required to further validate the predictions of a coupled CAFE model.

Journal

  • ISIJ International

    ISIJ International 46 (6), 880-895, 2006

    The Iron and Steel Institute of Japan

Citations (4)*help

See more

References(68)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top