Effects of different processing parameters on the semisolid microstructure of Al6061 produced by a direct thermal method

Abstract The effect of different processing parameters consist pouring temperature and holding time on the semisolid microstructure Al6061 feedstock billet produced by direct thermal method has been investigated in present paper. In this experimental works, molten aluminium alloy 6061 was poured into a thin cylindrical copper mould at constant 660 °C held times 20 s, 40 60 s. After it reached desired time, then quenched room water. formation billets characterized after were taken out from mould. Results show that, due to rapid cooling condition inside mould, more globular microstructures obtained. sample with apparent. Simultaneously, s smaller grain size than Based results, superior shorter which allowed them be faster results works suggest that DTM merely depended heat convection retarded dendritic thus transformed for metal processing.