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Modelling of Grain Refinement in Aluminium Alloys

Published online by Cambridge University Press:  15 February 2011

A. L. Greer ,
A. Tronche  and
M. Vandyoussefi
A. L. Greer
Affiliation:
University of Cambridge, Department of Materials Science & Metallurgy, Pembroke Street, Cambridge CB2 3QZ, UK
A. Tronche
Affiliation:
University of Cambridge, Department of Materials Science & Metallurgy, Pembroke Street, Cambridge CB2 3QZ, UK
M. Vandyoussefi
Affiliation:
University of Cambridge, Department of Materials Science & Metallurgy, Pembroke Street, Cambridge CB2 3QZ, UK
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Abstract

Commercial grain refiners for aluminium solidification are so potent that the barrier forgrain initiation is that for free growth rather than for nucleation itself. In this case quantitative prediction of grain size is possible. For small melt volumes a successful isothermal-melt model is presented. This is extended to directional solidification in a temperature gradient using cellular-automaton modelling of grain growth with finite-element heat-flow calculations.

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References

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