Modification of interdendritic convection in directional solidification by a uniform magnetic field
Modification of interdendritic convection in directional solidification by a uniform magnetic field
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DOI：
10.1016/s1359-6454(98)00064-0
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发表时间：
1998-07-01
期刊：
影响因子：
9.4
通讯作者：
Bolcato, R
中科院分区：
文献类型：
--
作者：
Lehmann, P;Moreau, R;Bolcato, R
由于热电效应，在金属合金凝固过程中，在枝晶网络中出现局部电流密度。因此，当施加磁场时，就会产生洛伦兹力。两种合金在横向磁场下水平定向凝固，结果是这种力与自然溶质浮力相反。实验结果表明，当电场达到临界值时，可以达到平衡。该值与预测的电流强度一致。最后，提出了一个简单的糊状区流动模型。(C)1998年冶金学报
Because of thermoelectric effects, a local current density appears in the dendritic network during the solidification of a metallic alloy. Thus, when a magnetic field is applied, a Lorentz force is created. Two alloys are solidified directionally in the horizontal configuration under a transverse magnetic field with the result that this force opposes the natural solutal buoyancy force. The experimental results show that an equilibrium can be reached for a critical value of the field. This value agrees with the predicted intensity of the currents. Finally, a simple model for the flow in the mushy zone is proposed. (C) 1998 Acta Metallurgica Inc.