Ratke, Lorenz (2009) Effect of fraction solid on coarsening of secondary dendrite arms. International Journal of Cast Metals Research, 22 (1-4), pp. 268-270. Taylor & Francis. doi: 10.1179/136404609X367911.
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Official URL: http://www.ingentaconnect.com/content/maney/ijcmr/2009/00000022/F0040001/art00066;jsessionid=12be9xxyrk7w3.alice
Abstract
Coarsening of secondary dendrite arms in mushy zones has been investigated theoretically and experimentally for many decades and simple phenomenological models have been developed describing the cube root dependence of the spacing on the solidification time. These models neglect in their description of mass transport between dendrite arms, that the finite volume fraction modifies the transport fluxes considerably. This paper describes an extension of conventional theoretical models for the secondary arm spacing based on finite volume fraction effect models for Ostwald ripening of spherical or cylindrical ensembles. The model predicts a much larger coarsening rate while the kinetics (cube root dependence) is conserved.
Item URL in elib: | https://elib.dlr.de/59738/ | ||||||||
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Document Type: | Article | ||||||||
Title: | Effect of fraction solid on coarsening of secondary dendrite arms | ||||||||
Authors: |
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Date: | August 2009 | ||||||||
Journal or Publication Title: | International Journal of Cast Metals Research | ||||||||
Refereed publication: | Yes | ||||||||
Open Access: | No | ||||||||
Gold Open Access: | No | ||||||||
In SCOPUS: | Yes | ||||||||
In ISI Web of Science: | Yes | ||||||||
Volume: | 22 | ||||||||
DOI: | 10.1179/136404609X367911 | ||||||||
Page Range: | pp. 268-270 | ||||||||
Publisher: | Taylor & Francis | ||||||||
Status: | Published | ||||||||
Keywords: | secondayr dendrite arms, fraction solid, coarsening, Ostwald ripening | ||||||||
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 Materialwissenschaftliche Forschung (old) | ||||||||
Location: | Köln-Porz | ||||||||
Institutes and Institutions: | Institute of Materials Physics in Space | ||||||||
Deposited By: | Ratke, Prof. Lorenz | ||||||||
Deposited On: | 20 Aug 2009 14:38 | ||||||||
Last Modified: | 22 Mar 2024 10:14 |
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