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HomeMaterials Science ForumMaterials Science Forum Vol. 649Flow Effects on Mush Coarsening

Flow Effects on Mush Coarsening

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Abstract:

Gradient annealing experiments of a near-eutectic AlCu30 alloy with artificial stirring induced by a rotating magnetic field (RMF) of 6 mT were performed. The specific surface area of the primary phase was measured on metallographic sections perpendicular to the sample axis with a fixed amount of fraction solid. The variation of the specific surface area with fluid flow is compared to flow free experiments: the specific surface area varies as the inverse cube root of annealing time if no RMF is applied, but varies as an inverse forth root at 6 mT. The experimental procedure and results are presented in detail and discussed with models of convective coarsening of dendrites.

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Solidification and Gravity V

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Periodical:

Materials Science Forum (Volume 649)

Pages:

409-414

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.649.409

Citation:

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Online since:

May 2010

Authors:

Galina Kasperovich, Sonja Steinbach, Lorenz Ratke

Keywords:

AlCu30 Alloy, Coarsening, Mushy Zone, Rotating Magnetic Field, Specific Surface Area

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