Semi solid casting of aluminum alloy using a cooling slope technic

Abstract EN

In this study, semi-solid metal casting technology has been used to make castings from al alloy 6063 scrap using different casting temperatures and a cooling slope of 30cm long.

the purpose of the cooling slope was to cool down the liquid metal into a semi-solid state of about 60% liquid before entering the mold.

the results showed that the semi-solid metal cast samples that pass over a cooling slope had higher strength and ductility as compared to the traditional direct casted samples due to the evolution of microstructure from dendritic into globular morphology.

a ductility increase over 38%, 100%, and 34% is recorded for semi-solid casting over a cooling slope compared to direct casting for liquid metal at 750oc, 800oc, and 900oc respectively.

strength is improved by about 8% for semi-solid casting at 750 and 900oc compared to direct casting.

for 800oc no improvement is recorded in terms of the tensile strength for cooling slope over direct casting.