Simulation on DC casting of magnesium alloy under out-of-phase pulsed magnetic field with different coil connection strategies

2020 ◽  
Vol 162 ◽  
pp. 120353
Author(s):  
Wenchao Duan ◽  
Jiaxin Bao ◽  
Wenhong Liu ◽  
Zhiqiang Zhang ◽  
Jianzhong Cui
Keyword(s):  
Magnetic Field ◽  
Magnesium Alloy ◽  
Pulsed Magnetic Field ◽  
Dc Casting

Effect of Electromagnetic Vibration on Microstructures of Semi-Continuous Casting AZ80 Magnesium Alloy Billet

2010 ◽  
Vol 146-147 ◽  
pp. 1797-1800
Author(s):  
Zhi Qiang Zhang ◽  
Qi Chi Le ◽  
Jian Zhong Cui ◽  
Shi Jie Guo
Keyword(s):  
Magnetic Field ◽  
Magnesium Alloy ◽  
Continuous Casting ◽  
Uniform Distribution ◽  
Alternating Magnetic Field ◽  
Stationary Magnetic Field ◽  
Electromagnetic Vibration ◽  
Az80 Magnesium Alloy ◽  
Dc Casting ◽  
Vibration Casting

Microstructures and macrosegregation of AZ80 magnesium alloy billets cast with and without the electromagnetic vibration were investigated. Compared with the conventional DC casting, microstructures of the billet have been greatly refined and the macrosegregation had been effectively reduced in electromagnetic vibration casting conditions. Increasing the electromagnetic vibration intensity, including both the stationary magnetic field and alternating magnetic field, leads to finer grains and more uniform distribution of solute elements in the billet.

Numerical study of flow and heat transfer behaviors during direct-chill casting of large-size magnesium alloy billet under pulsed magnetic field

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Wenchao Duan ◽  
Siqi Yin ◽  
Wenhong Liu ◽  
Jian Yang ◽  
Qingfeng Zhu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Magnesium Alloy ◽  
Lorentz Force ◽  
Duty Cycle ◽  
Direct Chill ◽  
Content Type ◽  
Flow And Heat Transfer ◽  
Large Size ◽  
Dc Casting

Purpose The purpose of this paper is to investigate the effect of pulsed magnetic field (PMF) with different duty cycles on the melt flow and heat transfer behaviors during direct-chill (DC) casting of large-size magnesium alloy billet and find the appropriate range of duty cycle. Design/methodology/approach A transient two-dimensional mathematical model coupled electromagnetic field, flow field and thermal field, is conducted to study the melt flow and temperature field under PMF and compared with that under the harmonic magnetic field. Findings The results reveal that melt vibration and fluctuation are generated due to the instantaneous impact of repeated thrust and pull effects of Lorentz force under PMF. The peak of Lorentz force decreases greatly with the increasing duty cycle, but the melt fluctuation region is expanded with higher duty cycle, which accelerates the interior melt velocity and reduces the temperature gradient at the liquid-solid interface. However, PMF with overly high duty cycle has adverse effect on the melt convection and limited influence on the interior melt. A duty cycle of 20% to 50% is a reasonable range. Practical implications This paper can provide guiding significance for the setting of duty cycle parameters on DC casting under PMF. Originality/value There are few reports on the effect of PMF parameters during DC casting with applying PMF, especially for duty cycle, a parameter unique to PMF. The findings will be helpful for applying the external field of PMF on DC casting.

Direct chill casting of magnesium alloy under pulsed magnetic field

2016 ◽  
Vol 33 (1) ◽  
pp. 33-39 ◽  
Author(s):  
H. M. Ji ◽  
T. J. Luo ◽  
C. Wang ◽  
J. Cui ◽  
Y. S. Yang
Keyword(s):  
Magnetic Field ◽  
Magnesium Alloy ◽  
Direct Chill ◽  
Direct Chill Casting ◽  
Pulsed Magnetic Field ◽  
Chill Casting
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