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Casting-chill interface heat transfer during solidification of an aluminum alloy

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Abstract

Unidirectional solidification tests on an aluminum alloy were conducted with a computer-controlled instrumented rig. The alloys employed in this study were poured into isolated ingot molds (made of recrystallized alumina and covered with ceramic fiber) placed on top of a steel plate, coated either with a graphite- or ceramic-based paint in order to avoid sticking of the material. Thermal evolution during the test was captured by type-K thermocouples placed at different positions in both the ingot and the plate. The bottom surface of the plate was either cooled with water or left to cool in air. The heat-transfer coefficients across the aluminum-steel interface were evaluated by means of a finite-difference model. It was concluded that the heat-transfer rate depends on the conditions at the interface, such as the type of coating used to protect the plate, and the solidification reactions occurring on the aluminum during its solidification.

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Author notes

  1. Sigifredo Cano (Process Engineer)

    Present address: Corporation Nemak, USA

  2. Jesus Talamantes (Graduate Student) & Rafael Colas (Professor)

    Present address: the Facultad de, Ingernieria Mecanica y Electrica, Universidad Autonoma de Nuevo Leon, 66451, Cd. Universitaria, N.L., Mexico

Authors and Affiliations

  1. Corporativo Nemak, S.A. de C.V., 66000, Garcia, N.L., Mexico

    Eulogio Velasco (Process Engineer), Salvador Valtierra (Research and Development Manager) & Juan Francisco Mojica (Technology, Vice-President)

  2. the Department of Mechanical Engineering, The University of Sheffield, S1 3JD, Sheffield, United Kingdom

    Jesus Talamantes (Graduate Student)

  3. Mahle, Inc., 37815, Morristown, TN

    Sigifredo Cano (Process Engineer)

Authors
  1. Eulogio Velasco
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  2. Salvador Valtierra
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  3. Juan Francisco Mojica
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  4. Jesus Talamantes
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  5. Sigifredo Cano
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  6. Rafael Colas
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Velasco, E., Valtierra, S., Mojica, J.F. et al. Casting-chill interface heat transfer during solidification of an aluminum alloy. Metall Mater Trans B 30, 773–778 (1999). https://doi.org/10.1007/s11663-999-0039-0

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  • DOI: https://doi.org/10.1007/s11663-999-0039-0

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