Influence of the slowly rotating transverse magnetic field on the solidification of metallic alloys
In this work binary alloy of Pb-Sn is directionally solidified under transverse,slowly rotating magnetic field.For some alloys during directional solidification in the transverse magnetic field significant macrosegregation along the diameter of the ingot may appear if the growth velocity and magnetic field strength are chosen appropriately.This occurs as a result of thermoelectric current,driven by the applied temperature gradient at the solidification interface,and magnetic field interaction caused liquid phase forced convection(thermoelectromagnetic convection).Magnetic field rotation velocity in chosen to be slow enough that induced electric current can be neglected but still fast enough not letting thermoelectromagnetic convection fully develop in the scale of crucible.In this case the effect caused by thermoelectromagnetic convection on the structure is expected to be different from the case with static magnetic field,which is already studied in many works.Newest experimental results as well as theoretical description and interpretation of the obtained results of direction solidification experiments under rotating magnetic field will be presented in this paper.Magnetic field of 0.5 T is created by rotating permanent magnet system driven by electric step motor.
Directional solidification thermoelectromagnetic convection rotating magnetic field
I.Kaldre Y.Fautrelle J.Etay A. Bojarevics L. Buligins
SIMAP-EPM,PHELMA-Campus,BP75,38402 St Martin dHères Cedex,France;Institute of Physics University of SIMAP-EPM,PHELMA-Campus,BP75,38402 St Martin dHères Cedex,France Institute of Physics University of Latvia,Miera str. 32,LV-2169,Salaspils,Latvia University of Latvia,Faculty of Physics and Mathematics,Zellu str. 8,LV-1002,Rīga,Latvia
国际会议
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)
北京
英文
1-4
2012-10-22（万方平台首次上网日期，不代表论文的发表时间）