Numerical Simulation and Experimental Investigation of the Preparation of Aluminium Alloy 2A50 Semi-Solid Billet by Electromagnetic Stirring

Wang, Yongfei; Zhao, Shengdun; Guo, Yansong

doi:10.3390/ma13235470

Cited by 9 publications

(4 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The specific heat capacity C str and the thermal conductivity λ str of the strips actually change with the temperature during SSPR and are not constant values. At present, the thermal and elastic property coefficient used in thermal formation simulations is mostly invariant, resulting in certain errors between the experimental and simulated values [21][22][23]. Thus, the coefficients varying with temperature are necessary in SSPR simulation.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

The Effect of Powder Temperature on Semi-Solid Powder Rolling AA2024 Based on Experiments and Numerical Simulation

Wu,

Cai,

Wang

et al. 2023

Metals

View full text Add to dashboard Cite

Semi-solid powder rolling (SSPR) is widely used to produce alloy strips with fine grains and excellent performances in the automotive, aerospace and shipbuilding industries. During SSPR, powder temperature, as a very important parameter, greatly affects strips’ microstructures and mechanical properties, which have been investigated by many researchers, but its effect on the forming process and mechanism has rarely been studied. Therefore, based on online experimental detection and transient simulation, the microstructures, strip temperatures, relative densities and rolling forces at different conditions were, respectively, measured, calculated, compared and analyzed in order to study the deformation process and mechanism during SSPR. The result shows that with the increase in powder temperature, the strip temperature and relative density increase, while the rolling force decreases. The grains of the strips are refined after SSPR, and fine and dense microstructures are obtained at 600 °C, which is the optimum powder temperature. In the main deformation sections (II and III), when the contact normal force exists and reaches a maximum, the relative density and rolling force increase rapidly. At these sections, the strips rolled at 600 °C are mainly in a porous solid state, and powder crushing dominates the strip deformation. Therefore, SSPR at 600 °C and below can be considered porous or powder hot rolling, integrating powder crushing, solidification, deformation, densification and grain coarsening. Moreover, as the simulated values are basically consistent with experimental values, the thermomechanical coupling model based on the Fourier equation and its parameters are confirmed to be reasonable.

show abstract

Section: Theoretical Backgroundmentioning

confidence: 99%

The Effect of Powder Temperature on Semi-Solid Powder Rolling AA2024 Based on Experiments and Numerical Simulation

Wu,

Cai,

Wang

et al. 2023

Metals

View full text Add to dashboard Cite

show abstract

“…Numerous studies have shown that the use of electromagnetic stirring (EMS) in DC processes can solve the aforementioned problems [12,13]. Electromagnetic continuous casting technology has always been a very attractive method in aluminum alloy production.…”

Section: Introductionmentioning

confidence: 99%

Effect of Electromagnetic Power on the Microstructure and Properties of 2219 Aluminum Alloy in Electromagnetic Continuous Casting Technology

Jiang,

Xu,

et al. 2024

Metals

View full text Add to dashboard Cite

Electromagnetic continuous casting technology serves as a significant means for enhancing the casting performance of 2219 aluminum alloy. Investigating the influence of electromagnetic field variations on the solidification process is crucial for studying the microstructure and mechanical properties of electromagnetic cast billets. Through experimental research, variations in the microstructure and mechanical properties were examined for ordinary direct chill casting, as well as three different electromagnetic power casting ingots. The COMSOL software (COMSOL Multiphysics 6.0) was utilized to simulate the temperature and flow field, enabling an explanation of the resulting performance changes. The results showed the effect on electromagnetic continuous casting technology by the electromagnetic field generated by the Lorentz force and melt stirring, improving the melt flow and temperature distribution so that the melt center and the edge of the melt forcible convection were enhanced, thus realizing the tissue refinement, mechanical properties, and Cu element segregation of the improvement. With an increase in electromagnetic power, the distribution of the temperature field was more homogeneous, the segregation phenomenon was more alleviated, and the improvement in mechanical properties was more significant. The optimal microstructure and mechanical properties were achieved at a power of 20.0 kW, with a 74.7% improvement in grain refinement in the center and a tensile strength increase of 30.8%. Additionally, significant improvements were observed in segregation phenomena.

show abstract

“…The behaviors of heat and mass transfer at the solid-liquid interface are essential factors during the continuous casting, which affects the quality of final product. With the rapid development of continuous casting in recent years, the electromagnetic stirring (EMS) can transfer heat and kinetic energy without direct contact with molten steel, which is widely used in continuous casting, [1][2][3][4][5][6][7] semisolid casting, [8] and directional solidification processes. Due to the effect of EMS on improving the solidification structure of billet, reducing the superheat of molten steel, and reducing the defects of center segregation [9,10] and porosity, [11] it has been widely concerned and studied by researchers.…”

Section: Introductionmentioning

confidence: 99%

Study on Stirring Effect of Spiral Magnetic Field in Continuous Casting of Round Blooms

Zhang,

Xu,

Lei

et al. 2023

steel research int.

View full text Add to dashboard Cite

In this paper, for the continuous casting of round blooms with strand electromagnetic stirring, the effects of rotating magnetic field (RMF) and spiral magnetic field (SMF) on the electromagnetic, fluid flow, heat transfer, solidification and macrostructure were investigated by numerical simulation and industrial experiments, respectively. The results show that the molten steel flows in a spiral shape along the casting direction with the RMF and SMF. Due to the influence of secondary flow caused by electromagnetic stirring (EMS), and the zone of high velocity of molten steel accounts for 13.7% of the whole stirring range with the RMF. The SMF has a strong stirring effect in the whole range of secondary flow, the zone of high velocity of molten steel accounts for 49.1% of the whole stirring range, and the liquid fraction of the SMF at the liquid core is also lower. The results of the industrial experiments prove that the SMF has a wider stirring depth than the RMF, and the center crack range is significantly reduced.This article is protected by copyright. All rights reserved.

show abstract

Numerical Simulation and Experimental Investigation of the Preparation of Aluminium Alloy 2A50 Semi-Solid Billet by Electromagnetic Stirring

Cited by 9 publications

References 24 publications

The Effect of Powder Temperature on Semi-Solid Powder Rolling AA2024 Based on Experiments and Numerical Simulation

The Effect of Powder Temperature on Semi-Solid Powder Rolling AA2024 Based on Experiments and Numerical Simulation

Effect of Electromagnetic Power on the Microstructure and Properties of 2219 Aluminum Alloy in Electromagnetic Continuous Casting Technology

Study on Stirring Effect of Spiral Magnetic Field in Continuous Casting of Round Blooms

Contact Info

Product

Resources

About