Hötzer, Johannes and Jainta, Marcus and Steinmetz, Philipp and Nestler, Britta and Dennstedt, Anne and Genau, Amber and Bauer, Martin and Köstler, Harald and Rüde, Ulrich (2015) Large scale phase-field simulations of directional ternary eutectic solidification. Acta Materialia (93), pp. 194-204. Elsevier. doi: 10.1016/j.actamat.2015.03.051. ISSN 1359-6454.
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Abstract
Pattern formation in ternary eutectic microstructures is difficult to predict because of the complex interactions between diffusion and surface energies, as well as the large number of possible configurations which three phases can assume. The silver–aluminum–copper (Ag–Al–Cu) ternary eutectic is of particular interest to researchers, but its study is complicated by an unusually large solubility change. Due to this change, it is difficult to observe the patterns that form during the solid–liquid phase transition experimentally. This causes significant differences between the structure that forms during solidification and what is observed after traditional directional solidification processing. In order to model the solidification behavior and pattern formation in representative volume elements, large scale phase-field simulations are employed. Two different parameter sets are used. The first set uses the phase fractions and compositions of the as-solidified structure. The other used phase fractions found at lower temperatures in order to be comparable to experimental microstructures available in the literature. The second set of simulation results is compared quantitatively to experimental micrographs and found to be in good agreement. The predicted three-dimensional microstructures for the as-solidified structure are presented.
Item URL in elib: | https://elib.dlr.de/98644/ | ||||||||||||||||||||||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||||||||||||||||||||||
Title: | Large scale phase-field simulations of directional ternary eutectic solidification | ||||||||||||||||||||||||||||||||||||||||
Authors: |
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Date: | 2015 | ||||||||||||||||||||||||||||||||||||||||
Journal or Publication Title: | Acta Materialia | ||||||||||||||||||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||||||||||||||||||
Open Access: | No | ||||||||||||||||||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||||||||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||||||||||||||||||||||||
DOI: | 10.1016/j.actamat.2015.03.051 | ||||||||||||||||||||||||||||||||||||||||
Page Range: | pp. 194-204 | ||||||||||||||||||||||||||||||||||||||||
Publisher: | Elsevier | ||||||||||||||||||||||||||||||||||||||||
ISSN: | 1359-6454 | ||||||||||||||||||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||||||||||||||||||
Keywords: | Phase-field simulation; Directional solidification; Eutectic structure; Al–Ag–Cu; Pattern formation | ||||||||||||||||||||||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||||||||||||||||||||||||
HGF - Program: | Space | ||||||||||||||||||||||||||||||||||||||||
HGF - Program Themes: | Research under Space Conditions | ||||||||||||||||||||||||||||||||||||||||
DLR - Research area: | Raumfahrt | ||||||||||||||||||||||||||||||||||||||||
DLR - Program: | R FR - Research under Space Conditions | ||||||||||||||||||||||||||||||||||||||||
DLR - Research theme (Project): | R - Vorhaben Materialwissenschaftliche Forschung (old) | ||||||||||||||||||||||||||||||||||||||||
Location: | Köln-Porz | ||||||||||||||||||||||||||||||||||||||||
Institutes and Institutions: | Institute of Materials Physics in Space > Scientific Experiments MP | ||||||||||||||||||||||||||||||||||||||||
Deposited By: | Dennstedt, Dr. Anne | ||||||||||||||||||||||||||||||||||||||||
Deposited On: | 20 Oct 2015 08:20 | ||||||||||||||||||||||||||||||||||||||||
Last Modified: | 10 Jan 2019 15:45 |
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