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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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Official URL: http://www.international-foundry-research.com

Abstract

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.

Document Type:Article
Title:Microsegregation in AlCu4 and the importance of accurate liquid diffusion data
Authors:
AuthorsInstitution or Email of Authors
Kasperovich, Galinagalina.kasperovich@dlr.de
Meyer, Andreasandreas.meyer@dlr.de
Ratke, Lorenzlorenz.ratke@dlr.de
Date:December 2010
Journal or Publication Title:Giessereiforschung - International Foundry Research
Refereed publication:Yes
Volume:62
Page Range:pp. 8-13
ISSN:0046-5933
Status:Published
Keywords:solidification, macrosegregation, diffusion data
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:04 Jan 2011 10:41
Last Modified:07 Feb 2013 19:23

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