Effects of the frequency of the pulsed magnetic field on Mg-Gd-Y-Zr magnesium alloy during solidification process were investigated.With applying pulsed magnetic field during the solidification

the grain size can be refined.At the same time

the content of Gd or Y in the grain are increased

and the amount of eutectic structure on the grain boundary is also correspondingly decreased by applying the pulsed magnetic field of 10 Hz.The charged ions moves in a spiral way in the direction of magnetic force line with the action of pulsed magnetic field

and the periodic change of the magnitude and direction of electric field force restrains the free vibration of particles

resulting in the more energy potential barrier required to be overcome

which are responsible for the increase of solute content of Gd and Y in grains.