Design of mechanical properties of Al-alloys chill castings based on the metal/mold interfacial heat transfer coefficient

Abstract Solidification thermal parameters such as the growth rate and the cooling rate depend on the metal/mold heat transfer efficiency, usually characterized by an interfacial heat transfer coefficient, hi, and determine the arrangement of the solidification microstructure, including its morphology and scale. The mechanical properties can be correlated with the microstructural parameters such as the cellular and dendritic spacings and hence with the instantaneous value of hi. In the present investigation, it is shown that hi varies in time according to an expression of the form h i = a t − m , where m

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