Abstract
This study presents the results of an investigation that characterises the thermophysical properties of an investment casting mould, comprising of a Zirconium dioxide/Cobalt aluminate prime slurry and a fused Silica/fibre reinforced backup slurry. Growing prevalence of successful computer simulations within the foundry industry enables defects that emerge during the casting process to become increasingly predictable, providing cost-effective alternatives to trial castings. The viability of these simulations as predictors is heavily dependent upon the facilitation of accurate material property data, as attained through this investigation. Differential scanning calorimetry (DSC) and laser flash analysis (LFA) were utilized to determine the specific heat capacity and thermal diffusivity, respectively. These values, in combination with the material density and linear coefficient of thermal expansion, have been used to determine the thermal conductivity of the mould. With the aim of verifying these parameters, initial studies in Flow-3D® simulation software have been performed to determine the constraints needed to reduce variability in simulation parameters. Due to the diversity of casting moulds used throughout the industry, ensuring the material database is kept as comprehensively populated as possible is a crucial undertaking.
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Acknowledgements
The authors wish to thank the Engineering and Physical Sciences Research Council (EPSRC) [Grant EP/L016389/1] and TPC Components AB for providing the necessary funding for this research.
The authors wish to thank Cranfield University, Jonkoping University, and the University of Warwick for providing access to scientific equipment needed to complete these investigations.
The authors wish to specifically thank Dr. Jacob Steggo and Jörgen Eriksson for their outstanding support during this research.
The data used in this paper is described in CORD at http://doi.org/10.17862/cranfield.rd.9934280.
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Jones, C.A., Jolly, M.R., Jarfors, A.E.W., Irwin, M. (2020). An Experimental Characterization of Thermophysical Properties of a Porous Ceramic Shell Used in the Investment Casting Process. In: TMS 2020 149th Annual Meeting & Exhibition Supplemental Proceedings. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-36296-6_102
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DOI: https://doi.org/10.1007/978-3-030-36296-6_102
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