Study of Heterogeneous Nucleation of α-Al on Grain Refiner Particles during Rapid Solidification

  1. Dipl.-Ing. K. Ehrke Chairman2 and
  2. Prof. Dr. W. Schneider3
  1. P. Cizek,
  2. B.J. McKay and
  3. P. Schumacher

Published Online: 21 APR 2006

DOI: 10.1002/3527607331.ch37

Continuous Casting

Continuous Casting

How to Cite

Cizek, P., McKay, B.J. and Schumacher, P. (2000) Study of Heterogeneous Nucleation of α-Al on Grain Refiner Particles during Rapid Solidification, in Continuous Casting (eds K. Ehrke and W. Schneider), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527607331.ch37

Editor Information

  1. 2

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

  2. 3

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

Author Information

  1. University of Oxford, Oxford, UK

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;
  • heterogeneous nucleation of α-Al on grain refiner particles;
  • rapid solidification;
  • Al3Ti layers

Summary

The aim of the present work was to elucidate whether the Al3Ti layers originate directly from grain refiner master alloys and whether they undergo changes during re-melting of these alloys. Rapid quenching, using melt spinning, was used to study the nucleation behaviour of α-Al and Al3Ti on boride particles and the thermal stability of the aluminide layers. The resulting large undercoolings facilitated multiple nucleation events on individual boride particles, as a result of small critical nucleus sizes, in contrast to small undercoolings obtained during conventional solidification.