Effects of pulsed peak value current on directional solidification structure in the pure aluminum were investigated by employing high intensity pulsed current during directional solidification process.It is found that with increasing in high intensity pulsed current

the directional solidification structure in the pure aluminum is evolved from regular columnar crystal to cellular crystal and then to developed dendrite and finally to columnar crystal.Taking into account of coupling effects of inductive magnetic field and pulsed current

based on electromagnetic hydromechanics

role mechanism of high intensity pulsed current on solidification structure was analyzed.The evolution of solidification structure is attributed to high-frequency oscillatory magnetic filed induced by high intensity pulsed current causing dynamic radial electromagnetic pressure which can affect distribution of the flow field and temperature gradient on the front face of liquid metal above solidification interface and scour the dendritic arm.