Reliability and properties enhancement of as-cast aluminum alloy through gating system design

Abstract

In this work, the influence of temperature on fluidity and gating system design on the physical, and mechanical properties of as-cast AA6063-T6 aluminum alloy have been examined. The pouring temperature has been used as a controlling parameter for flowability measurement and a spiral ceramic placed in a sand mold for measuring the fluidity index of the molten alloy. A linear relationship between the casting temperature and the fluidity length was observed. These show that fluidity increases linearly with the pouring temperature. Also, an expanding systems and pressurized gating systems were experimented through sprue-runner to cross-sectional area variation. The ultimate tensile strength of the samples was not significantly affected by the in-gate system design. Meanwhile, the fracture elongation seemed to be more dependent on the melt quality than on the in-gate system design. The true stress-strain graph indicates that expanding systems are better than pressurized systems. The plot of residual against fit for regression analysis does not show random distribution about the reference point.