Modelling of Macrosegregation in Continuous Casting of Aluminium

  1. Dipl.-Ing. K. Ehrke Chairman3 and
  2. Prof. Dr. W. Schneider4
  1. T. Jalanti1,
  2. M. Swierkosz2,
  3. M. Gremaud2 and
  4. M. Rappaz1

Published Online: 21 APR 2006

DOI: 10.1002/3527607331.ch28

Continuous Casting

Continuous Casting

How to Cite

Jalanti, T., Swierkosz, M., Gremaud, M. and Rappaz, M. (2000) Modelling of Macrosegregation in Continuous Casting of Aluminium, in Continuous Casting (eds K. Ehrke and W. Schneider), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527607331.ch28

Editor Information

  1. 3

    ALUMINIUM Essen GmbH, Sulterkamp 71, D-45356 Essen, Germany

  2. 4

    VAW Aluminium AG, Forschung und Entwicklung, Georg-von-Boeselager-Str. 25, D-53117 Bonn, Germany

Author Information

  1. 1

    Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Métallurgie Physique, CH-1015 Lausanne, Switzerland

  2. 2

    Calcom SA, PSE, Ecublens, CH-1015 Lausanne, Switzerland

Publication History

  1. Published Online: 21 APR 2006
  2. Published Print: 29 NOV 2000

ISBN Information

Print ISBN: 9783527302833

Online ISBN: 9783527607334

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Keywords:

  • continuous casting;
  • modeling;
  • macrosegregation in continuously cast Al-Mg slabs

Summary

Within the framework of the Brite-Euram research program EMPACT (A European Modelling Programme on Aluminium Casting Technology), macrosegregation in continuously cast Al-Mg slabs has been modelled. For that purpose, the average conservation equations of mass, momentum, heat and solute were derived, including the shrinkage contribution and the transport of the solid. Solvers for these equations were implemented in the Finite Element software calcoMOS. At each time step, the variations of enthalpy and average solute contents were computed by successive solution of the above equations. A microsegregation model then allowed to determine the increments of the volume fraction of solid, temperature, liquid and solid concentrations, and average density. This model encompassed back-diffusion in the primary phase and non-linear phase diagrams. It was found that the negative and positive segregations measured at the centre and surface of DC cast ingots, respectively, could be explained to a fairly large extent by the solidification shrinkage contribution.