Multiple non-equilibrium phase transformations: Modeling versus electro-magnetic levitation experiment

A segregation model for multiple phase transformations is coupled with thermodynamic equilibrium calculations, including dendritic, peritectic and eutectic reactions. Its predictions are compared with measurements deduced from an electro-magnetic levitation solidification experiment of an aluminum–n...

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Bibliographic Details
Published in:Acta materialia 2011-06, Vol.59 (11), p.4665-4677
Main Authors: Tourret, D., Gandin, Ch.-A., Volkmann, T., Herlach, D.M.
Format: Article
Language:English
Subjects:
Applied sciences
Cooling curves
Electro-magnetic levitation
Engineering Sciences
Eutectic reactions
Exact sciences and technology
Levitation
Materials
Mathematical models
Metals. Metallurgy
Modeling
Nucleation
Peritectic
Phase transformations
Segregation
Solidification
Supercooling
Thermodynamic equilibrium
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Description
Summary:A segregation model for multiple phase transformations is coupled with thermodynamic equilibrium calculations, including dendritic, peritectic and eutectic reactions. Its predictions are compared with measurements deduced from an electro-magnetic levitation solidification experiment of an aluminum–nickel alloy. Quantitative agreement is found for the cooling curve and the fraction of microstructures, providing a validation of the kinetics of phase transformations. The effects of nucleation undercooling and coupling with thermodynamic equilibrium calculations are discussed.
ISSN:1359-6454
1873-2453
DOI:10.1016/j.actamat.2011.04.013