Distributions of Electromagnetic Fields and Forced Flow and Their Relevance to the Grain Refinement in Al–Si Alloy Under the Application of Pulsed Magneto-Oscillation

被引:0
作者
Yan-Yi Xu
Jing Zhao
Chun-Yang Ye
Yan-Ping Shen
Xin-Cheng Miao
Yun-Hu Zhang
Qi-Jie Zhai
机构
[1] Shanghai University,Center for Advanced Solidification Technology
[2] Tangshan University,Key Lab of Intelligent Equipment Digital Design and Process Simulation
[3] University of Science and Technology Liaoning,School of Materials Science and Engineering
来源
Acta Metallurgica Sinica (English Letters) | 2022年 / 35卷
关键词
Pulsed magneto-oscillation (PMO); Electromagnetic field; Forced flow; Solidification; Grain refinement;
D O I
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学科分类号
摘要
Distributions of electromagnetic fields and induced forced flow inside a metal melt are crucial to understand the grain refinement of the metal driven by pulsed magneto-oscillation (PMO). In the present study, PMO-induced electromagnetic fields and forced flow in Ga–20wt%In–12wt%Sn liquid metal have been systematically investigated by performing numerical simulations and corresponding experimental measurements. The numerical simulations have been confirmed by magnetic and melt flow measurements. According to the simulated distribution of electromagnetic fields under the application of PMO, the strongest magnetic field, electric eddy current and Lorentz force with inward radial direction inside the melt are concentrated adjacent the sidewall of cylindrical melt at the cross section of middle height of coil. As a result, a global forced flow throughout the whole cylindrical column filled with Ga–20wt%In–12wt%Sn melt is initiated with a flow structure of two pair of symmetric vortex ring. The PMO-induced electromagnetic fields and forced flow in Al–7wt%Si melt have been numerically simulated. The contribution of electromagnetic fields and forced flow to the grain refinement of Al–7wt%Si alloy under the application of PMO is discussed. It indicates that the forced flow may play a key role in the grain size reduction.
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页码:254 / 274
页数:20
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