Microsegregation in AlCu4 and the importance of accurate liquid diffusion data
Kasperovich, Galina and Meyer, Andreas and Ratke, Lorenz (2010) Microsegregation in AlCu4 and the importance of accurate liquid diffusion data. Giessereiforschung - International Foundry Research, 62 (4), pp. 8-13. ISSN 0046-5933.
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Microsegregation in an Al-4 wt % Cu alloy was investigated experimentally and theoretically to disclose the importance of accurate liquid diffusion data in models predicting microstructures. Experimentally, directional solidification with a cooling rate of 1 K/s was employed. Theoretically a two-dimensional pseudo-front tracking (PFT) model was used. The experimentally determined distribution of the main microstructural features including its Cu concentration have been compared to microstructure and concentration predictions of a 2D PFT model. The liquid diffusion coefficient used in the model was varied around recently measured values in order to check its impact on the microstructure prediction. The results clearly indicate that accurate liquid diffusion data are necessary for predictions comparing well with experiments.
|Title:||Microsegregation in AlCu4 and the importance of accurate liquid diffusion data|
|Journal or Publication Title:||Giessereiforschung - International Foundry Research|
|Page Range:||pp. 8-13|
|Keywords:||solidification, macrosegregation, diffusion data|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W FR - Forschung unter Weltraumbedingungen|
|DLR - Research area:||Space|
|DLR - Program:||W FR - Forschung unter Weltraumbedingungen|
|DLR - Research theme (Project):||W - Vorhaben Materialwissenschaftliche Forschung (old)|
|Institutes and Institutions:||Institute of Materials Physics in Space|
|Deposited By:||Prof. Lorenz Ratke|
|Deposited On:||04 Jan 2011 10:41|
|Last Modified:||07 Feb 2013 19:23|
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