Lu Zhenyuan, Fautrelle Yves, Ren Zhongming, Li Xi
State Key Laboratory of Advanced Special Steels, Shanghai University, Shanghai, 200072, P. R. China.
SIMAP-EPM-Madylam/G-INP/CNRS, Phelma, 38402, Saint Martin d'Heres Cedex, France.
Sci Rep. 2018 Jul 13;8(1):10641. doi: 10.1038/s41598-018-28888-8.
Peritectic alloy Cu-10.5 at.% Sn was directionally solidified at various growth speeds under a transverse static magnetic field. The experimental results indicated that the magnetic field caused the deformation of macroscopic interface morphology, the crystal orientation of primary phase along solidification direction, and the occurrence of peritectic reaction. The numerical simulations showed that the application of the magnetic field induced the formation of a unidirectional thermoelectric magnetic convection (TEMC), which modified solute transport in the liquid phase thereby enriching the solute concentration both at the sample and tri-junction scales. The modification of solidification structures under the magnetic field should be attributed to TEMC driven heat transfer and solute transport.
包晶合金Cu-10.5 at.% Sn在横向静磁场下以不同生长速度进行定向凝固。实验结果表明，磁场导致宏观界面形态发生变形、初生相的晶体取向沿凝固方向变化以及包晶反应的发生。数值模拟表明，施加磁场会诱导形成单向热电磁对流（TEMC），这改变了液相中的溶质传输，从而在样品和三相交界处尺度上富集了溶质浓度。磁场下凝固组织的改变应归因于TEMC驱动的传热和溶质传输。
