Transient numerical simulation of solidification characteristic under differential phase pulsed magnetic field

Wang, Hang; Jia, Yonghui; Le, Qichi; Bao, Lei

doi:10.1016/j.commatsci.2019.109261

Cited by 13 publications

(6 citation statements)

References 25 publications

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“…2) The metal melt is regarded as an incompressible fluid and the melt density adheres to the Boussinesq approximation. [ 31 ] 3) Neglecting the effects of solute field, solidification shrinkage, and continuous casting caster curvature on molten steel flow and temperature distribution. 4) The mushy zone is considered a porous medium, and the flow in the mushy zone follows the Darcy’ s law.…”

Section: Multifield Coupling Numerical Modelmentioning

confidence: 99%

Optimization of Process Parameters for 40Cr Steel Continuous Casting Round Bloom with Pulsed Magneto‐Oscillation Treatment

Yang,

Chen,

Zhang

et al. 2024

steel research int.

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To reduce the solidification structure defects and the macrosegregation of the Φ300 mm continuous casting round bloom, the pulsed magneto‐oscillation (PMO) treatment is added at the secondary cooling zone. A numerical model for calculating the pulsed electromagnetic field, flow field, and temperature field in continuous casting is established, and the coupling simulations of multiphysical fields under different casting parameters and PMO parameters are performed. Their influence on solidification process and the appropriate parameters are discussed. The industrial experiments conducted under the recommended parameters yield good results. Industrial experiments show that when the peak current is increased from 1350 to 1550 KIA and the casting speed is increased from 0.75 to 0.90 m min−1, PMO can increase the equiaxed grain zone and reduce the carbon macrosegregation of the bloom. Moreover, at high casting speed, PMO treatment can significantly promote columnar‐to‐equiaxed transition and increase the width of mixed grain zone.

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Section: Multifield Coupling Numerical Modelmentioning

confidence: 99%

Optimization of Process Parameters for 40Cr Steel Continuous Casting Round Bloom with Pulsed Magneto‐Oscillation Treatment

Yang,

Chen,

Zhang

et al. 2024

steel research int.

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“…The molten pool of the L-DED process with an external magnetic field involves fluid dynamics, heat and mass transfer, MHD, etc. It is impossible to describe this process complete with a numerical model, the simplifications as follows were made (Gan et al , 2017a; Wang et al , 2020; Ge et al , 2021): The liquid metal flow is assumed to be Newtonian laminar and incompressible. The magnetic field strength does not decay inside the molten pool. The heat loss, mass loss and recoil pressure force from the liquid metal vaporization are ignored. …”

Section: Mathematical Modelsmentioning

confidence: 99%

Section: Mathematical Modelsmentioning

confidence: 99%

“…Numerical simulation is an effective method to explore the interaction of Lorentz force, induced current, magnetic field and the influence of Lorentz force on melt flow. Multiphysical models, including magnetohydrodynamics (MHD), thermodynamic and mass transfer, have been established for welding and casting processes (Bachmann et al , 2016; Li et al , 2016; Meng et al , 2019; Wang et al , 2020). Whereas there is little modeling research focusing on the magnetic field-assisted L-DED process.…”

Section: Introductionmentioning

confidence: 99%

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Thermo-fluid flow behavior of the IN718 molten pool in the laser directed energy deposition process under magnetic field

Zhou

Fan

et al. 2022

RPJ

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Purpose This paper aims to understand the magnetohydrodynamics (MHD) mechanism in the molten pool under different modes of magnetic field. The comparison focuses on the Lorenz force excitation and its effect on the melt flow and solidification parameters, intending to obtain practical references for the design of magnetic field-assisted laser directed energy deposition (L-DED) equipment. Design/methodology/approach A three-dimensional transient multi-physical model, coupled with MHD and thermodynamic, was established. The dimension and microstructure of the molten pool under a 0T magnetic field was used as a benchmark for accuracy verification. The interaction between the melt flow and the Lorenz force is compared under a static magnetic field in the X-, Y- and Z-directions, and also an oscillating and alternating magnetic field. Findings The numerical results indicate that the chaotic fluctuation of melt flow trends to stable under the magnetostatic field, while a periodically oscillating melt flow could be obtained by applying a nonstatic magnetic field. The Y and Z directional applied magnetostatic field shows the effective damping effect, while the two nonstatic magnetic fields discussed in this paper have almost the same effect on melt flow. Since the heat transfer inside the molten pool is dominated by convection, the application of a magnetic field has a limited effect on the temperature gradient and solidification rate at the solidification interface due to the convection mode of melt flow is still Marangoni convection. Originality/value This work provided a deeper understanding of the interaction mechanism between the magnetic field and melt flow inside the molten pool, and provided practical references for magnetic field-assisted L-DED equipment design.

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“…Vanja Hatić [ 18 ] and Božidar Šarler [ 19 ] developed a comprehensive, multiphysics, meshless, unique numerical model to simulate direct chill casting under a LEFC, and the effect of the low-frequency electromagnetic force on the temperature, liquid fraction, and fluid flow are solved with the meshless diffuse approximate method under different current densities and frequencies. Wang [ 20 ] stimulated the solidification characteristic under different phase-pulsed magnetic fields using a transient two-dimensional axisymmetric model and compared the results of the components of the Lorentz force. However, when the billet gets bigger, the skin effect gets worse in the DC casting.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Study on the Direct Chill Casting of Large-Scale AA2219 Billets via Annular Coupled Electromagnetic Field

et al. 2022

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The internal coupled electromagnetic melt treatment (ICEMT) method is firstly proposed to produce high-quality and large-sized aluminum alloy billets. A three-dimensional model was established to describe the ICEMT process of direct chill casting (DC casting). The effect of ICEMT on the fluid flow patterns and temperature field in the DC casting of ϕ880 mm AA2219 billets is numerically analyzed. Moreover, the mechanisms of the ICEMT process on grain refinement and macrosegregation were discussed. The calculated results indicate that the electromagnetic field appears to be coupled circinate at the cross section of the melt, the fluid flow becomes unstable accompanied by the bias flow, and the temperature profiles are significantly more uniform. An experimental verification was conducted and the results prove that compared with traditional direct chill casting, the microstructures of the AA2219 large-scale billet under the ICEMT process are uniform and fine.

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Transient numerical simulation of solidification characteristic under differential phase pulsed magnetic field

Cited by 13 publications

References 25 publications

Optimization of Process Parameters for 40Cr Steel Continuous Casting Round Bloom with Pulsed Magneto‐Oscillation Treatment

Optimization of Process Parameters for 40Cr Steel Continuous Casting Round Bloom with Pulsed Magneto‐Oscillation Treatment

Thermo-fluid flow behavior of the IN718 molten pool in the laser directed energy deposition process under magnetic field

Numerical and Experimental Study on the Direct Chill Casting of Large-Scale AA2219 Billets via Annular Coupled Electromagnetic Field

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