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Ludwig, Andreas and Wu, Menghuai and Abandano, Merlin and Ratke, Lorenz (2005) Graviyt-Induced Convection during Directional Solidification of Hypermonotectic Alloys. In: Solidification and Gravity IV, 508, pp. 193-198. Trans Tech Publications. Fourth International Conference on Solidification and Gravity, 2004-09-06 - 2004-09-09, Miskolc, Hungary. ISBN 0-87849-991-1.
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Official URL: http://www.scientific.net
Abstract
A two-phase volume-averaging model developed for the simulation of the dynamic decomposition and solidification of hypermonotectic alloys was used to study the occurrence of convection phenomena during directional solidification of a hypermonotectic alloy (Al-10 wt.%Bi) under terrestrial condition. The model accounts for nucleation and growth of secondary phase droplets, Marangoni and Stokes forces, solute partitioning, heat release due to decomposition and solidification. It is shown that the appearance and growth of secondary droplets is accompanied with a continuous downwards motion of droplets, which rapidly becomes unstable. After relaxation of this dynamic motion the advancing solidification front freezes in the resulting non-uniform droplet distribution.
| Item URL in elib: | https://elib.dlr.de/20782/ | |||||||||||||||
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| Document Type: | Conference or Workshop Item (Speech, Paper) | |||||||||||||||
| Title: | Graviyt-Induced Convection during Directional Solidification of Hypermonotectic Alloys | |||||||||||||||
| Authors: |
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| Date: | 2005 | |||||||||||||||
| Journal or Publication Title: | Solidification and Gravity IV | |||||||||||||||
| Refereed publication: | No | |||||||||||||||
| Open Access: | No | |||||||||||||||
| Gold Open Access: | No | |||||||||||||||
| In SCOPUS: | No | |||||||||||||||
| In ISI Web of Science: | No | |||||||||||||||
| Volume: | 508 | |||||||||||||||
| Page Range: | pp. 193-198 | |||||||||||||||
| Editors: |
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| Publisher: | Trans Tech Publications | |||||||||||||||
| Series Name: | Materials Science Forum | |||||||||||||||
| ISBN: | 0-87849-991-1 | |||||||||||||||
| Status: | Published | |||||||||||||||
| Keywords: | Hypermonotectic, decomposition, directional solidification, modeling, droplet motion, convection, phase distribution | |||||||||||||||
| Event Title: | Fourth International Conference on Solidification and Gravity | |||||||||||||||
| Event Location: | Miskolc, Hungary | |||||||||||||||
| Event Type: | international Conference | |||||||||||||||
| Event Dates: | 2004-09-06 - 2004-09-09 | |||||||||||||||
| HGF - Research field: | Aeronautics, Space and Transport (old) | |||||||||||||||
| HGF - Program: | Space (old) | |||||||||||||||
| HGF - Program Themes: | W FR - Forschung unter Weltraumbedingungen (old) | |||||||||||||||
| DLR - Research area: | Space | |||||||||||||||
| DLR - Program: | W FR - Forschung unter Weltraumbedingungen | |||||||||||||||
| DLR - Research theme (Project): | W - Vorhaben Materialforschung unter Mikro-g (old) | |||||||||||||||
| Location: | Köln-Porz | |||||||||||||||
| Institutes and Institutions: | Institute of Materials Physics in Space > Institute of Space Simulation | |||||||||||||||
| Deposited By: | Ratke, Prof. Lorenz | |||||||||||||||
| Deposited On: | 21 Dec 2005 | |||||||||||||||
| Last Modified: | 27 Apr 2009 04:48 |
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