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Chill Cooling for the ElectroMagnetic Levitator in relation with Continuous Casting

Gandin, Charles-André und Riveaux, Bernard und Bellet, Michel und Herlach, Dieter und Volkmann, Thomas und Johannsen, Niko und Bobadilla, Michel und Bontems, N (2011) Chill Cooling for the ElectroMagnetic Levitator in relation with Continuous Casting. 4th Int. Symposium on Physical Sciences in Space, 11. - 15. Juli 2011, Bad Godesberg, Deutschland.

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Kurzfassung

The project “Chill Cooling for the ElectroMagnetic Levitator in relation with Continuous Casting” aims to develop a device to directionally solidify steel samples. This contribution will present the device developed for parabolic flights using the TEMPUS facility as well as for the TEXUS 46 sounding rocket using the EML-3 facility. It consists of a Si3N4 plate that can be put into contact with a levitated and melted steel droplet. Thanks to on-board video monitoring with a high-speed camera, the time evolution of the sample geometry is recorded during solidification. The position of the growth front can be tracked. Pyrometers also register the thermal history. Analyses of the experimental results show a deformation of the sample geometry from its initially almost spherical shape. Very distinct cooling rates are also recorded close to the plate and at the free surface of the sample. Thermo-mechanical modeling was developed and applied to the TEXUS-46 experiment. Several materials properties are measured or extracted from the databases, while others are not well known. Simulations permit to identify limitations linked to properties, and more particularly the role of the mechanical behavior within the mushy zone in order to simulate the shape evolution of the sample. Coupling is achieved between the deformation of the solid and the fluid dynamics. This also includes the variation of the density of the phases for tracking the effect of shrinkage. Finally, a macrosegregation map can be computed for solute specie. It reveals the effect of the deformation and contraction induced solid velocity on the fluid flow and solute mass transfer.

Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Chill Cooling for the ElectroMagnetic Levitator in relation with Continuous Casting
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Gandin, Charles-AndréCharles-Andre.Gandin@mines-paristech.fr
Riveaux, BernardMMINES ParisTech CEMEF
Bellet, MichelMINES ParisTech CEMEF
Herlach, Dieterdieter.herlach@dlr.de
Volkmann, Thomasthomas.volkmann@dlr.de
Johannsen, NikoRuhr-Universität Bochum
Bobadilla, MichelARCELORMITTAL
Bontems, NARCELORMITTAL
Datum:12 Juli 2011
Stichwörter:Electromagnetic Levitation, Chill Casting, Microgravity Experiments
Veranstaltungstitel:4th Int. Symposium on Physical Sciences in Space
Veranstaltungsort:Bad Godesberg, Deutschland
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:11. - 15. Juli 2011
Veranstalter :Institut für Materialphysik im Weltraum, DLR Köln, und ESA
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Forschung unter Weltraumbedingungen
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R FR - Forschung unter Weltraumbedingungen
DLR - Teilgebiet (Projekt, Vorhaben):R - Vorhaben Materialforschung unter Mikro-g
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Materialphysik im Weltraum
Hinterlegt von: Dieter Herlach
Hinterlegt am:28 Jul 2011 15:08
Letzte Änderung:28 Jul 2011 15:08

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