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Modeling of Macrosegregation and Secondary Phase Precipitation During Solidification of Binary Alloys

[+] Author Affiliations
O̸yvind Nielsen

SINTEF Materials Technology, Oslo, Norway

Harald Laux, Anne Lise Dons

SINTEF Materials Technology, Trondheim, Norway

Paper No. IMECE2002-32890, pp. 237-242; 6 pages
doi:10.1115/IMECE2002-32890
From:
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Volume 5
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-3636-3 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME

abstract

A multiphase volume-averaged model describing macrosegregation in an alloy that solidifies by the formation and growth of a primary and a secondary solid phase has been formulated. The model is based on the work presented by Ni and Beckermann (Metall. Trans. 22B, 1991, p. 349), but is extended to account for secondary phase precipitation. A CFD model has been developed by implementation of the mathematical model in a commercial CFD code. Macrosegregation due to thermo-solutal convection in binary alloys with a stationary solid phase (primary and secondary solids) has been simulated. The predictions compare fairly well to experimental results and simulations previously reported in the literature.

Copyright © 2002 by ASME

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