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Study of dilute Al–Cu solidification by cooling curve analysis

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Abstract

The solidification path of a dilute Al–Cu alloy was studied using controlled solidification conditions and thermal analysis. Under equilibrium considerations, below the limit of maximum solubility, a unique α phase is expected, rounded by rich non eutectic composition. However, the precipitation of the second phase θ is present even for dilute compositions, fundamentally favored by segregation in the liquid and instabilities in the front of solidification. This effect has technological and academic implications, related to the precipitation of intermetallic compounds from the melt.

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Acknowledgements

This work was carried out at IFIMAT (CICPBA-MT, UNCPBA) and supported by SeCAT-UNCPBA, ANPCyT, CONICET, and CICPBA. We also appreciate the technical support given by O. Toscano at Thecnical Department of IFIMAT during the design of the equipment.

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Authors and Affiliations

  1. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917, Buenos Aires, C1033AAJ, Argentina

    Osvaldo Fornaro

  2. Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CICPBA), 526 e/10 y 11, La Plata, B1096APP, Argentina

    Hugo A. Palacio

  3. Instituto de Física de Materiales Tandil (IFIMAT), Facultad de Ciencias Exactas, Universidad Nacional del Centro de la Provincia de Buenos Aires, Pinto 399, Tandil, B7000GHG, Argentina

    Osvaldo Fornaro & Hugo A. Palacio

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  1. Osvaldo Fornaro
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  2. Hugo A. Palacio
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Correspondence to Osvaldo Fornaro.

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Fornaro, O., Palacio, H.A. Study of dilute Al–Cu solidification by cooling curve analysis. J Mater Sci 44, 4342–4347 (2009). https://doi.org/10.1007/s10853-009-3648-8

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