Process of Equiaxed Grains of RE-Al Alloy under Slope Vibration
A new technique using slope vibration casting process during heating and isothermal holding period to prepare Al-7Si-2RE alloy has been studied. The small, near-spherical and non-dendritic microstructure with the semi-solid processing requirements has been obtained. Experiments show that the cooling method, pouring process and the convection of melt caused by slope vibration had significant effects on the formation of near-spherical primary gains. The water-cooled copper mold casting with slope vibration at the temperature near liquidus can obtain Al-7Si-2RE alloy with small homogeneous equiaxed grains, the average grain diameter is 48.3μm, and the average grain roundness is 1.92.
Sihai Jiao, Zhengyi Jiang and Jinglong Bu
S. K. Xie et al., "Process of Equiaxed Grains of RE-Al Alloy under Slope Vibration", Advanced Materials Research, Vols. 146-147, pp. 349-352, 2011