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Dendrite arm spacing and grain size prediction in directionally solidified Al-Cu alloy–modelling and experimental study

Kasperovich, Galina and Ratke, Lorenz and Steinbach, Sonja (2008) Dendrite arm spacing and grain size prediction in directionally solidified Al-Cu alloy–modelling and experimental study. Giessereiforschung, 60 (2), pp. 14-25. ISSN 0046-5933.

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Abstract

The microstructure in binary Al-4 wt% Cu alloy solidified directionally under precisely defined thermal conditions in aerogel based furnaces is analysed in detail metallographically and compared with a full 3D simulation of the whole solidification facility and microstructure evolution models. Features like primary stem spacing, secondary dendrite arm spacing and grain size were measured and quantitative relationships between cooling rate, dendrite spacings and grain size have been compared to predictions implemented in the casting simulation software package ProCAST© coupled with a 3D Cellular Automaton technique in the CAFE module of CALCOSOFT©. The comparison between the very precise experiments and predictions by the microstructure laws implemented in the software tools shows that a good agreement can be obtained if the thermal history of the solidification process and the parameters of grain nucleation and evolution are chosen properly.

Document Type:Article
Title:Dendrite arm spacing and grain size prediction in directionally solidified Al-Cu alloy–modelling and experimental study
Authors:
AuthorsInstitution or Email of Authors
Kasperovich, GalinaUNSPECIFIED
Ratke, LorenzUNSPECIFIED
Steinbach, SonjaUNSPECIFIED
Date:2008
Journal or Publication Title:Giessereiforschung
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:60
Page Range:pp. 14-25
ISSN:0046-5933
Status:Published
Keywords:Solidification, Cooling rate, Dendrite arm spacing, Grain size, Simulation
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: Prof. Lorenz Ratke
Deposited On:14 Jul 2008
Last Modified:27 Apr 2009 15:04

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