Effect of Static Magnetic Field on 2024 Aluminum Alloy Solidification Behavior

2011 ◽  
Vol 225-226 ◽  
pp. 701-705
Author(s):  
Chang Gui Cheng ◽  
Le Yu ◽  
Wen Cheng Wan ◽  
Zhong Tian Liu ◽  
Yan Jin
Keyword(s):  
Magnetic Field ◽  
Aluminum Alloy ◽  
Static Magnetic Field ◽  
Solidification Rate ◽  
Solidification Structure ◽  
Peltier Effect ◽  
Magnetic Flux Density ◽  
Solidification Behavior ◽  
2024 Aluminum Alloy ◽  
Alloy Solidification

With the methods of macrostructure observation and temperature measurement, the paper has studied the influence rules of static magnetic field on 2024 aluminum alloy solidification structure and solidification rate. The conclusions can be concluded as follows: the static magnetic field can inhibit the growth of columnar crystals and promote the growth of equiaxed crystals; when the magnetic flux density is increased, the grain refining effect is better, the solidification rate of 2024 aluminum alloy increases remarkably, and the full solidification time is shorter; the reasons of grain refinement may be that the thermo-electromagnetic convection effect related to Peltier effect is stronger than electromagnetic braking effect, which can enhance the heat transfer and fluid flow in the solidification front, and that undercooling temperature is enlarged.

Study on Heat Transfer Model of 2024 Aluminum Alloy under Static Magnetic Field

2011 ◽  
Vol 366 ◽  
pp. 229-233
Author(s):  
Chang Gui Cheng ◽  
Le Yu ◽  
Wen Cheng Wan ◽  
Zhong Tian Liu
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Aluminum Alloy ◽  
Static Magnetic Field ◽  
Transfer Problem ◽  
Heat Transfer Model ◽  
Transfer Model ◽  
Measured Temperature ◽  
2024 Aluminum Alloy ◽  
Magnetic Filed

The paper has established a two-dimensional non-steady-state heat transfer model for 2024 aluminum alloy solidification process under the static magnetic field. According to the measured temperature and the inverse heat transfer problem, the boundary conditions of model have been determined, the results show that the solidification rate and heat flux acting on the ingot surface increase with increasing of the static magnetic filed strength; when the static magnetic filed strength become stronger, the isotherm location will move towards the liquid pool center, and the temperature gradient in the liquid metal pool will increase.

Tensile properties and microstructure of 2024 aluminum alloy subjected to the high magnetic field and external stress

2016 ◽  
Vol 25 (10) ◽  
pp. 106201 ◽  
Author(s):  
Gui-Rong Li ◽  
Fei Xue ◽  
Hong-Ming Wang ◽  
Rui Zheng ◽  
Yi Zhu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Aluminum Alloy ◽  
Tensile Properties ◽  
High Magnetic Field ◽  
External Stress ◽  
2024 Aluminum Alloy

Rapid air film continuous casting of aluminum alloy using static magnetic field

2009 ◽  
Vol 22 (5) ◽  
pp. 339-344
Author(s):  
Fu QU ◽  
Huixue JIANG ◽  
Gaosong WANG ◽  
Qingfeng ZHU ◽  
Xiangjie WANG ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Aluminum Alloy ◽  
Continuous Casting ◽  
Static Magnetic Field ◽  
Air Film

Effect of Electromagnetic Field on Microstructure of 5052 Aluminum Alloy Sheet by Roll-Casting

2010 ◽  
Vol 146-147 ◽  
pp. 911-915
Author(s):  
Jin Tao Li ◽  
Guang Ming Xu ◽  
Jian Zhong Cui
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Field ◽  
Aluminum Alloy ◽  
Static Magnetic Field ◽  
Alternating Current ◽  
Alloy Sheet ◽  
Aluminum Alloy Sheet ◽  
Oscillation Effect ◽  
Electromagnetic Oscillation ◽  
Roll Casting

The effect of electromagnetic field on microstructure of roll-casting 5052 aluminum alloy sheet has been investigated and analyzed. The results indicate that imposing static magnetic field can refine the grains of 5052 aluminum alloy during the roll-casting; accordingly, imposing static magnetic field and alternating current at the same time, the grains are remarkably refined and equiaxed due to electromagnetic oscillation effect.

scholarly journals Influence of a High Static Magnetic Field on the Morphology of Primary Al3Fe Phase in Al-3%Fe Alloy

2021 ◽  
Vol 2101 (1) ◽  
pp. 012070
Author(s):  
Fangwei Jin ◽  
Xueying Ji
Keyword(s):  
Magnetic Field ◽  
Static Magnetic Field ◽  
Nucleation Rate ◽  
Layered Structure ◽  
Applied Field ◽  
Magnetic Interaction ◽  
Interaction Force ◽  
Solidification Structure ◽  
Layer Structures ◽  
Nucleation Work

Abstract It had been done the experiments of the solidification on Al-Fe alloy under a high static magnetic field (10T). The effect of high magnetic field on the morphology of primary Al3Fe phase in Al-3%Fe alloy solidification structure has been investigated by analyzing the microstructures. The experimental results shew that the variation of the morphology of Al3Fe phase was obvious under a high static magnetic field, and them changed to particle-likes and short needles from needle-likes, and they were arranged in chains along the direction of magnetic field to form oriented layered structure. The critical nucleation work reduced and the nucleation rate increased under the applied field, and the magnetic interaction caused by the field can suppress the growth of needle-like Al3Fe phase, both of them resulted in the particle-likes and short needles grains of primary Al3Fe phase to nucleate and grow preferentially. Under the action of magnetic moment and the magnetic interaction force a high static magnetic field, the grains of Al3Fe rotated and then polymerized, and finally formed chain arrangements and layer structures.

scholarly journals A Numerical and Experimental Study on the Solidification Structure of Fe–Cr–Ni Steel Slab Casting by Roller Electromagnetic Stirring

Metals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 6
Author(s):  
Hong Xiao ◽  
Pu Wang ◽  
Bing Yi ◽  
Xiqing Chen ◽  
Aiwu Li ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Molten Steel ◽  
Electromagnetic Force ◽  
Solidification Rate ◽  
Coupling Model ◽  
Electromagnetic Stirring ◽  
Solidification Structure ◽  
Magnetic Flux Density ◽  
Electromagnetic Flow ◽  
Slab Casting

We present a segmented coupling model for slab casting by roller electromagnetic stirring (R-EMS) of electromagnetic, flow, heat transfer, and solidification behavior based on magnetohydrodynamics and solidification theory. A three-dimensional (3-D) segmented coupling model that included electromagnetic, flow, and heat transfer elements was established using Ansoft Maxwell and ANSYS Fluent software. The effects of the roller sleeve, magnetic shielding ring, coil, core, molten steel, and air domain on the electromagnetic, thermal and flow fields were studied numerically. The accuracy of the model was verified by measuring the magnetic flux density at the centerline in a pair of rollers and the electromagnetic force of the copper plate. Based on the numerical results of the optimal technical parameters, the effect of the R-EMS on the solidification of Fe–17 wt% Cr–0.6 wt% Ni stainless steel was explored. The results indicated that with each additional pair of electromagnetic rollers, the average electromagnetic force increased by 2969 N/m3 in the casting direction, and 5600 N/m3 in the central section of the rollers. With increasing number of pairs of rollers, the effective stirring region increased, and the velocity of molten steel at the solidification front first increased but then decreased. The strong electromagnetic swirling washing effect reduced the solidification rate of the slab shell and promoted the superheated dissipation of molten steel in the center of the strand. The center equiaxed crystal ratio of the slab was improved to 69% with two pairs of R-EMS rollers and electromagnetic parameters of 400 A/7 Hz, which was beneficial for obtaining a uniform and dense solidified structure to improve the subsequent hot working performance and product quality.

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