The effect of pouring temperatures to tensile strength and porosity of aluminium processed with vacuum casting

Pouring temperature also affects the mechanical properties of aluminium. High pouring will make aluminium grains become large and a lot gas be trapped into liquid metal when is poured mould. The right prevent porosity does not freeze before filling entire moulds cavity. casting process used permanent Temperature was 150 °C pressure 0.35 atm (absolute pressure). were 750, 800 850 °C. increasing reduce tensile strength specific density in vacuum system at 750 produce highest (130.26 MPa). 2.65 g/cm3