By using the CRP

the influences of forced convection

melt temperature and reactor temperature during solidification on the microstructure of the A357 semi-solid slurry have been investigated. The results show that melt forced mixing can result in the creation of fine spheroidal primary phase in the A357 semi-solid slurry

which is sharply different from that being un-treated by melt mixing. It is helpful for reducing the size and promoting the formation of near-spheroidal shape of primary phase with low melt temperature and reactor temperature

such as the melt temperature less than 640 ℃ and reactor temperature less than 300 ℃. Further analysis reveals that melt mixing can change the solidification structure of the slurry by controlling the nucleation and growth of the primary phase in the melt.