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Determination of the Solid-Liquid Interface Energy in the Al-Cu-Ag System

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Abstract

The solid-liquid interface energy, σ SL , is of major importance during phase transformation. It has a strong influence on solidification morphologies and the final grain structure. The “grain boundary groove in an applied temperature gradient” method developed by Gündüz et al.[6] was found to be suitable for measuring the solid-liquid interface energy in ternary alloy systems (e.g., Al-Cu-Ag). In order to measure the solid-liquid interface energy, a radial heat flow apparatus was constructed and assembled. This apparatus ensures a stable temperature gradient for hours and leads to grain boundary grooves in chemical equilibrium. After rapid quenching, the samples were metallographically prepared and the local curvature of the grooves was analyzed. To determine the interface energy, the Gibbs–Thomson equation was used, which requires the local curvature of the grain boundary grooves and the adherent local undercooling obtained from heat flux simulations on the scale of the grooves.

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Notes

  1. FLUENT® is a registered trademark of ANSYS, Inc., Lebanon, NH.

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Acknowledgments

The authors express their gratitude to the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG, Schwerpunktprogramm SPP 1120) for the financial support required to accomplish the studies within the DFG research focus, “Phase Transformations in Multicomponent Alloys.”

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Authors and Affiliations

  1. Foundry Institute, RWTH Aachen University, Aachen, D-52072, Germany

    A. Bulla ( Scientific Assistant), C. Carreno-Bodensiek ( Associate Professor), B. Pustal ( Scientific Assistant), R. Berger ( Scientific Assistant) & A. Bührig-Polaczek ( Director)

  2. Department of Metallurgy, University of Leoben, Leoben, A-8700, Austria

    A. Ludwig ( Professor, Head of Chair for Simulation and Modelling of Metallurgical Processes)

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  1. A. Bulla
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  2. C. Carreno-Bodensiek
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  3. B. Pustal
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  4. R. Berger
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  5. A. Bührig-Polaczek
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  6. A. Ludwig
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Corresponding author

Correspondence to A. Bulla.

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Manuscript submitted January 21, 2007.

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Bulla, A., Carreno-Bodensiek, C., Pustal, B. et al. Determination of the Solid-Liquid Interface Energy in the Al-Cu-Ag System. Metall Mater Trans A 38, 1956–1964 (2007). https://doi.org/10.1007/s11661-007-9275-6

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  • DOI: https://doi.org/10.1007/s11661-007-9275-6

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