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In situ investigation of Bi-rich droplets motion imposing electric current pulse (ECP) during Al-Bi immiscible alloy solidification was carried out by means of synchrotron microradiography technique.The results indicated that Bi-rich droplets motion in Al-matrix can be controlled by electromagnetic pinch force and Marangoni force induced by ECP and temperature gradient respectively.The droplets moved towards the two sides drove by electromagnetic pinch force and floated drawn by Marangoni force leading to the final morphology of an inverted triangle.