Columnar-to-equiaxed transition during directional solidification under strong magnetic field

摘要：

　　Effects of strong magnetic fields on the columnar-to-equiaxed transition(CET)have been investigated experimentally.Experimental results show that the application of a strong magnetic field causes a dendrite fragmentation and then the CET.The thermoelectric magnetic force acting on cells/dendrites and equiaxed grains in the mushy zone has been studied numerically.Numerical results reveal that a torque is created on cells/dendrites and equiaxed grains and the value of the thermoelectric magnetic force increases as the magnetic field intensity increase.This torque breaks cells/dendrites and drives the rotation of equiaxed grains.As a consequence,the CET will occur during directional solidification under a strong magnetic field.This may initiate a new method to induce the CET via an applied strong magnetic field during directional solidification.

关键词： Columnar-to-equiaxed transition strong magnetic field directional solidification

作者: Xi LI Dafan DU Annie GAGNOUD Yves FAUTRELLE Zhongming REN

作者单位: Department of Material Science and Engineering,Shanghai University,200072 Shanghai,P.R.China;SIMAP-E Department of Material Science and Engineering,Shanghai University,200072 Shanghai,P.R.China SIMAP-EPM-Madylam/CNRS,ENSHMG,BP 95,38402 St Martin dHeres Cedex,France

会议类型: 国际会议

会议名称: The 7th International Conference on Electromagnetic Processing of Materials(第七届冶金与材料电磁过程国际大会)

会议地点: 北京

会议语种:英文

页码: 1-4

在线出版日期: 2012-10-22（万方平台首次上网日期，不代表论文的发表时间）