Continuous solidification experiments have been carried out with Al-Bi alloys under a role of direct current.The effects of direct current density

alloy composition

solidification speed and conductivity of matrix liquid and dispersion phase on the solidification structure of immiscible alloys were investigated.The results demonstrate that a direct current shows great effect on the microstructure evolution in a continuously solidified immiscible alloy

which accelerate the minority phase droplets（MPDs）to migrate along the radial direction during the liquid-liquid phase change process.When the electric conductivity of MPD is lower than that of the matrix liquid

the MPDs is migrated from the center to the surface of the sample under the direct currents.When the electric conductivity of MPD is higher than that of the matrix liquid

the MPDs is migrated from the surface to the center of the sample.