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Graviyt-Induced Convection during Directional Solidification of Hypermonotectic Alloys

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

Full text not available from this repository.

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/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Graviyt-Induced Convection during Directional Solidification of Hypermonotectic Alloys
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ludwig, AndreasUniversity of Leoben, AustriaUNSPECIFIED
Wu, MenghuaiUniversity of Leoben, AustriaUNSPECIFIED
Abandano, MerlinRWTH AachenUNSPECIFIED
Ratke, LorenzUNSPECIFIEDUNSPECIFIED
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:
EditorsEmail
Roosz, A.UNSPECIFIED
Rettenmayr, M.UNSPECIFIED
Gacsi, Z.UNSPECIFIED
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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