The effects of alternating magnetic field-solidification pressure on the grain size of ZL205 Aalloy were investigated by observing the grain size in ZL205 Aalloy under the interaction field of alternating magnetic field and solidification pressure.The results reveal that the average grain size of ZL205 Aalloy sample is increased firstly and then decreased with the increase of excitation current intensity.With the increase of solidification pressure

when the excitation current intensity is less than 10 A

the synergistic effect of the variable magnetic field-solidification pressure can promote the grain growth in the alloy

and the average grain size will be coarsened.When the excitation current is more than 10 A

the synergistic effect of the alternating magnetic field-solidification pressure will inhibit grain growth and average grain size is refined.