Effects of forced electromagnetic vibrations during the solidification of aluminum alloys: Part I. solidification in the presence of crossed alternating electric fields and stationary magnetic fields

摘要: A new magnetohydrodynamic method of transmitting forced vibrations to solidifying aluminum alloy melts has been developed. Contrary the case conventional mechanoacoustic systems, this device lends itself very well a fundamental investigation. The relatively accurate knowledge both electromagnetic pressure and local velocity peaks enabled us reveal specific effects oscillatory flow cavitation phenomena on grain refinement. It shown that threshold depends surface state crucible internal walls peak. In presence well-developed situations, fine homogeneous microstructure observed throughout ingot. laboratory prototype cavity resonator, allowing for significant energy saving likely be used industrial applications, including elaboration metal matrix composites by means preform infiltration process, was also subject experimentation.