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中文摘要：
研究强磁场（0—10T）与工频（f=50Hz）交变电流（0-10A）的复合作用对Al-4．5mass％Cu合金凝固组织的影响。发现在施加垂直于磁场方向的交变电流时，会使电极间液态金属在电磁压力P作用下产生波动，导致合金凝固时枝晶组织的生长被打碎，出现等轴晶和颗粒状晶。在10T磁感应强度下，交变电流越大，波动越强，越易生成等轴晶和颗粒状晶；在10A交变电流下，磁感应强度增加到4T以后，等轴晶未随磁场的增加而完全转变成颗粒状晶；当P^→相同时，磁感应强度小的，容易出现等轴晶和颗粒状晶。
英文摘要：
The complex effect of high magnetic field and alternating current （f =-50Hz） on the solidified structure of Al-4.5 % Cu alloy was studied. It was found that when the alternating current was conducted vertically to the magnetic direction, the liquid metal between the electric poles was vibrated by the action of electromagnetic pressure P^→ to smash the dendrite of the solidified structure of Al- 4.5 % Cu alloy, and result in the formation of the equal-axis grains and the particle grains. At a magnetic field intensity of 10T, the higher the AC current, the stronger the vibration, the more easily the equalaxis grains and the particle grains created. At the 10A current intensity, the equal-axis grains were not disappeared completely when the magnetic field increased from 4T to 10T. At the same 15, the equal-axis grains and particle grains were obtained more easily in the condition of smaller magnetic field.
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