Modification of interdendritic convection in directional solidification by a uniform magnetic field

Journal Article · Wed Jul 01 04:00:00 EDT 1998 · Acta Materialia

DOI:https://doi.org/10.1016/S1359-6454(98)00064-0· OSTI ID:644322

Lehmann, P; Camel, D ^[1]; Moreau, R; Bolcato, R ^[2]

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1. Commissariat a l`Energie Atomique, Grenoble (France)
2. EPM-Madylam, St. Martin d`Heres (France)

Because of thermoelectric effects, a local current density appears in the dendritic network during the solidification of a metallic alloy. Thus, when a magnetic field is applied, a Lorentz force is created. Two alloys are solidified directionally in the horizontal configuration under a transverse magnetic field with the result that this force opposes the natural solutal buoyancy force. The experimental results show that an equilibrium can be reached for a critical value of the field. This value agrees with the predicted intensity of the currents. Finally, a simple model for the flow in the mushy zone is proposed.

• OSTI ID: 644322
• Report Number(s): CONF-9704224--
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 11 Vol. 46; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALLOYS
CONVECTION
CURRENT DENSITY
DENDRITES
LIQUID METALS
MAGNETIC FIELDS
MATHEMATICAL MODELS
SOLIDIFICATION