Abstract
The design of improved casting systems requires accurate modeling of metal cooling processes. This can only be accomplished after determining the interfacial heat transfer coefficient (IHTC) between a solidifying casting and its mould. In the current work, a simple and robust inverse heat conduction technique was applied for the estimation of the effective IHTC between an aluminum alloy casting and a steel permanent mould during solidification. The solidification of the alloy at varying mould preheating temperatures was monitored using a thermocouple, and the experimental cooling curves were compared with curves simulated by casting solidification modeling software. The IHTC value applied to the software was varied until its output converged with the experimental data, leading to an estimation of 6000 W/m2K for this system. This technique is useful as a preliminary tool in materials modeling, and it will promote the development of improved casting processes without the need for excessive experimentation.
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Acknowledgements
The authors are grateful to the Natural Sciences and Engineering Research Council of Canada (NSERC) for their financial support and to Thomas Warren of Gamma Foundries Inc. for chemical analysis of samples. Furthermore, the authors are thankful to Alan Machin, Dr. Anthony Lombardi and the members of the Centre for Near-net-shape Processing of Materials (CNPM) at Ryerson University for assistance during mould design and alloy casting.
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Vandersluis, E., Ravindran, C. Estimating the Effective Metal-Mould Interfacial Heat Transfer Coefficient via Experimental-Simulated Cooling Curve Convergence. Trans Indian Inst Met 71, 1231–1236 (2018). https://doi.org/10.1007/s12666-017-1259-7
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DOI: https://doi.org/10.1007/s12666-017-1259-7