Effect of strong pulsed electromagnetic field on metal's solidified structure

It was studied by us that new technologies using strong pulsed magnetic fie ld and electric current were applied to refine metal's solidified structure . These technologies improved remarkably the solidified structure of LY12 a luminum alloy and made the solidified grains more equiaxed and apparently f iner compared with that of the normal sample,which is of more dendrite grai ns. The stronger the strength of the pulsed electromagnetic field,the bette r the improvement effect was. The refinement mechanisms of the new technolo gies were analyzed theoretically. New phenomena and problems occurred in ou r experiments were also pointed out in this paper.