Effects of magnetic field and electric current on the solidification of AZ91D magnesium alloys using an electromagnetic vibration technique

摘要: Abstract Using an electromagnetic vibration (EMV) technique, we solidified the AZ91D magnesium alloys at different magnetic flux densities and electric current levels when frequency was kept 900 Hz so as to find optimum processing parameters. The microstructure microtexture of alloy were examined under various fields, revealing that with increase density, B0, becomes finer eventually consists equiaxed grains average diameter approximately 57 μm intensity B0 = 10 tesla (T). In terms effect on formation, grain size first decreases effective current, Je, increases from 10 60 ampere (A) then is further increased 80 120 A. refinement mechanism clarified considering overall EMV process during solidification. competition between Lorentz force due imposition alternating static also incorporated, which great importance in elucidating formation.