Studies on Transport Phenomena during Continuous Casting of an Al-Alloy in Presence of Electromagnetic Stirring

Simlandi, Sudip; Barman, Nilkanta; Chattopadhyay, Himadri

doi:10.1007/s12666-012-0205-y

Cited by 14 publications

(3 citation statements)

References 10 publications

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“…The application of external field nowadays is a commonly used method in DC casting to improve as-cast structure and reduce macrosegregation level (Zuo et al , 2005; Liu et al , 2020; Zhang et al , 2021), especially for magnetic field (MF). However, a majority of previous numerical works relating to the segregation under MF were focused on steel continuous casting or shape casting (Sun et al , 2015; Li et al , 2020; Wang et al , 2020), and little reported electromagnetic DC casting (Kumar and Dutta, 2005; Simlandi et al , 2013). Beyond that, there were also fewer researches associating with the solute segregation behavior in DC casting of rectangular slab (Pakanati et al , 2020; Gao et al , 2020), let along the corresponding researches under the action of MF.…”

Section: Introductionmentioning

confidence: 99%

Predicting the effect of different magnetic fields on the solute segregation during direct chill casting of large-size magnesium alloy slab

Duan

Yang

Liu

et al. 2023

HFF

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Purpose The purpose of this paper is to reveal the solute segregation behavior in the molten and solidified regions during direct chill (DC) casting of a large-size magnesium alloy slab under no magnetic field (NMF), harmonic magnetic field (HMF), pulsed magnetic field (PMF) and two types of out-of-phase pulsed magnetic field (OPMF). Design/methodology/approach A 3-D multiphysical coupling mathematical model is used to evaluate the corresponding physical fields. The coupling issue is addressed using the method of separating step and result inheritance. Findings The results suggest that the solute deficiency tends to occur in the central part, while the solute-enriched area appears near the fillet in the molten and solidified regions. Applying magnetic field could greatly homogenize the solute field in the two-phase region. The variance of relative segregation level in the solidified cross-section under NMF is 38.1%, while it is 21.9%, 18.6%, 16.4% and 12.4% under OPMF2 (the current phase in the upper coil is ahead of the lower coil), HMF, PMF and OPMF1 (the current phase in the upper coil lags behind the lower coil), respectively, indicating that OPMF1 is more effective to reduce the macrosegregation level. Originality/value There are few reports on the solute segregation degree in rectangle slab under magnetic field, especially for magnesium alloy slab. This paper can act a reference to make clear the solute transport behavior and help reduce the macrosegregation level during DC casting.

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Section: Introductionmentioning

confidence: 99%

Predicting the effect of different magnetic fields on the solute segregation during direct chill casting of large-size magnesium alloy slab

Duan

Yang

Liu

et al. 2023

HFF

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“…Though it was reported that it refined the grains, more micro defects and positive segregation in the center of the billet were observed [ 10 ]. Casting with the electromagnetic field has attracted a lot of attention and the presence of the electromagnetic field has significantly improved the quality of Al-alloy billets in industrial production [ 11 , 12 , 13 ]. Forced convection caused by the electromagnetic field in a contactless way can improve the chemical composition and temperature uniformity, refine the metallurgical structures and alleviate macrosegregation in the billets.…”

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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“…In order to solve the two problems mentioned above, the ultrasonic vibration and traditional electromagnetic stirring (EMS) are the frequently used methods [12][13][14][15][16][17]. In the process of ultrasonic vibration, the cavitation erosion usually occurs, which will damage the sonotrode [18].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Macrosegregation of Ф508 mm 7050 Aluminum Alloy Billet under Internal Electromagnetic Stirring

Qiu

Zhang

Zhao

et al. 2020

MSF

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To obtain fine microstructure and homogeneous distribution of alloying elements in the large-sized billet, the internal electromagnetic stirring as a new electromagnetic stirring method was proposed and utilized for the preparation of Ф508 mm 7050 aluminum alloy billet. The results demonstrate that the internal electromagnetic stirring could refine the microstructure and second phase, and alleviated the macrosegregation significantly. The grain size at the edge, 1/2 radius, and center of the billet decreased to 180 μm, 175 μm, and 185 μm, respectively. Moreover, the relative macrosegregation of Zn, Mg, and Cu at the edge and center decreased to 3.9% and 2.8%, 2.3% and 1.6%, 4.1% and 2.5%, respectively.

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Studies on Transport Phenomena during Continuous Casting of an Al-Alloy in Presence of Electromagnetic Stirring

Cited by 14 publications

References 10 publications

Predicting the effect of different magnetic fields on the solute segregation during direct chill casting of large-size magnesium alloy slab

Predicting the effect of different magnetic fields on the solute segregation during direct chill casting of large-size magnesium alloy slab

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

Microstructure and Macrosegregation of Ф508 mm 7050 Aluminum Alloy Billet under Internal Electromagnetic Stirring

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