Numerical simulation of the casting process of an AZ91D magnesium alloy under a rotating-pulsed combined electromagnetic field
J. Min. Metall. Sect. B-Metall., 60 (2) (2024) 191-204. DOI:10.2298/JMMB231220016L
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Available online 26 September 2024
(Received 20 December 2023; Accepted 27 August 2024)
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Using an AZ91D magnesium alloy as the research object, a three-dimensional (3D) numerical model was created and simulated using simulation analysis software. The effects of a rotating electromagnetic field (REMF), a pulsed electromagnetic field (PEMF) and a rotating pulsed electromagnetic field (R-PEMF) on the magnetic field and the flow field of a metal melt were investigated. The simulation results show that during the REMF treatment a rotational force is generated on the cross-section of the melt, and the PEMF exerts a magnetic pressure on the cross-section of the melt. Under the combined effect of these two forces, the Lorentz force increases parallel to the melt axis, and a secondary flow directed towards the core of the melt is generated, which contributes to the homogenization of the melt. By analyzing the solidification structure and elemental distribution of the metal, R-PEMF was shown to effectively improve the solidification structure and macrosegregation of Al in AZ91D magnesium alloy.
Keywords: Pulsed electromagnetic field; Rotating electromagnetic field; Combined electromagnetic field; Magnesium alloy; Numerical simulation
Correspondence Address:
Q.-W. Bai,
School of Rare Earth Industry, Inner Mongolia University of Science and Technology, Baotou, China; Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources (Inner Mongolia University of Science and Technology), Ministry of Education, Baotou, China; Inner Mongolia Autonomous Region Carbon Neutrality Collaborative Innovation Center;
email: abcqingwei@imust.edu.cn
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