Experimental Investigation on Interfacial Heat Transfer Coefficient during Solidification of Aluminum with 3.2% Magnesium Alloy Casting in CO2 Sand Moulds

Abstract

The ability to flow the heat to flow in casting during the solidification plays an important role for identifying the various conditions within the casting such as final shape, microstructure, defects and residual stresses. In this study, an experimental methodology is employed to identify the interfacial heat transfer coefficient of Aluminum with 3.2% Magnesium alloy in CO₂ gas mould. This study also identified the heat flux during the solidification of the casting. The peak heat transfer coefficient value was found to be around 370 W/m² k. The time required to arise the highest heat flux and interfacial heat transfer coefficient of Aluminum with 3.2% Magnesium alloy was about twenty seconds after pouring the liquid metal.