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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Tanaka, Manabu
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Topics
Publications (10/10 displayed)
- 2024Synthesis of ternary titanium–niobium nitride nanoparticles by induction thermal plasma
- 2022Numerical Analysis of Metal Transfer Process in Plasma MIG Weldingcitations
- 2021Effect of alkaline elements on the metal transfer behavior in metal cored arc weldingcitations
- 2021Relationship among welding defects with convection and material flow dynamic considering principal forces in plasma arc weldingcitations
- 2020Numerical study of the metal vapour transport in tungsten inert-gas welding in argon for stainless steelcitations
- 2020Numerical study of the effects and transport mechanisms of iron vapour in tungsten inert-gas welding in argoncitations
- 2020Multiwall Carbon Nanotube Composites as Artificial Joint Materials.citations
- 2018A computational model of gas tungsten arc welding of stainless steel: the importance of treating the different metal vapours simultaneouslycitations
- 2017Mixing of multiple metal vapours into an arc plasma in gas tungsten arc welding of stainless steelcitations
- 2015Numerical analysis of fume formation mechanism in TIG weldingcitations
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article
Numerical Analysis of Metal Transfer Process in Plasma MIG Welding
Abstract
In plasma MIG welding, inert gas introduced from the torch nozzle is ionized in upstream region of the MIG arc, which is termed as “plasma”. This study aims to clarify effect of the plasma on metal transfer process in the plasma MIG welding through numerical analysis. As a result, the plasma with temperature of approximately 10,000 K was found to be formed around the wire tip. The MIG arc temperature around the wire tip was 11,000 K at the maximum, which was lower than that of the conventional MIG welding by approximately 1,000 K. This difference was caused by the decreased current density around the wire tip due to influence of the plasma. The droplet temperature was also decreased by 400 K due to this lower current density. The amount of the metal vapor evaporated from the droplet was decreased than that of the conventional MIG welding due to the lower droplet temperature. It might lead to smaller amount of fume formation generally known in the plasma MIG welding. In the conventional MIG welding, the arc attachment was concentrated around the wire tip, leading to the higher current density. However, in the plasma MIG welding, the plasma transported to the surrounding of the wire tip increases the electric conductivity in that region also due to the influence of the metal vapor mixture. It leads to dispersion of the arc attachment toward the wire root. Consequently, the current density in the plasma MIG welding was found to decrease compared with that of the conventional MIG welding. The lower current density in plasma MIG welding decreases the Lorenz force acting on the wire neck, thus delaying droplet detachment to make the droplet diameter larger and the metal transfer frequency smaller. The latter was about 20 % of that in the conventional MIG welding.