Influence of cusp magnetic field configuration on K-TIG welding arc penetration behavior

Liu, Shang; Liu, Zu Ming; Zhao, Xing Chuan; Fan, Xiao Guang

doi:10.1016/j.jmapro.2020.02.027

Cited by 30 publications

(10 citation statements)

References 26 publications

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“…The cusp EMF is generated by four magnetic poles in form of excitation coils or permanent magnets, which can constrain the arc plasma [10]. Liu et al [11,12] observed that after the cusp EMF was applied, the area of the melted zone of K-TIG was reduced and its shape became ellipse, and they also indicated that the pole angle of magnetic field generator had important influence on melted zone area and weld penetration. The authors' research group have made the initial experiment to investigate the effect of a cusp EMF on T-TIG welding process, and pointed out that the cusp EMF could make the electron density of low-current T-TIG increased by 16%, so the physical property of the common conductive zone of the T-TIG was improved [13].…”

Section: Introductionmentioning

confidence: 99%

Influence of cusp external magnetic field on deposition rate of two-electrode TIG welding

Zhu

Liu

2022

Int J Adv Manuf Technol

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Experiments have been conducted to investigate the influence of the cusp external magnetic field (EMF) on deposition rate of two-electrode tungsten insert gas (T-TIG) welding.T-TIG arc parameters such as arc shape, arc voltage, arc pressure and arc plasma information were acquired respectively. Results showed compared to TIG, a higher welding current could be allowed for T-TIG, due to its low arc pressure characteristic. Under the effect of the cusp EMF, the arc shape was compressed along x-axis of T-TIG, while elongated along y-axis of T-TIG. Besides, the peak arc pressure of T-TIG was not significantly increased by the cusp EMF.Moreover, with the action of the cusp EMF, the maximum values of the electron temperature (Te) and electron density (Ne) of T-TIG were not significantly increased, but along y-axis, the increments of the two parameters were gradually increased and their distributions were widened. Therefore, more arc energy was allocated on y-axis of T-TIG by the cusp EMF, which could improve the preheating and the melting of the filler wire along y-axis, so the deposition rate of T-TIG could be increased by 17.6% under the effect of the cusp EMF.

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Section: Introductionmentioning

confidence: 99%

Influence of cusp external magnetic field on deposition rate of two-electrode TIG welding

Zhu

Liu

2022

Int J Adv Manuf Technol

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“…However, research related to EMF in gas metal arc welding (GMAW) or GTAW has been introduced for a long time since 1962 by Brown et al [5]. The technology used EMF with an induction coil or magnetic field from a permanent magnet is used for some reasons, such as associated with modifying the microstructure [6][7][8][9][10], improving corrosion resistance and pitting resistance [8,[11][12][13], enhanced weld penetration and the characteristics [14,15], the stability of the arc plasma [16][17][18], controlling the droplet transfer [8,19], improving the joint strength [9], and fatigue damage [10]. Compared to the traditional or conventional TIG welding, TIG assisted with an external permanent magnet can improve the depth-to-width ratio and reduce the corresponding heat input.…”

Section: Introductionmentioning

confidence: 99%

“…journal.ump.edu.my/ijame ◄ fatigue damage resistance by applying external axial current EMF in duplex stainless steel using GMAW. Shang Liu et al [14] applied cusp magnetic field (CMF) in K-TIG welding. The CMF has shown a better constrain effect compared to the non-CMF.…”

Section: Introductionmentioning

confidence: 99%

Study of Cross-Combination and Square-Combination Configuration Magnetic Field on Tungsten Inert Gas Welding

Baskoro¹,

Amat²,

Arisoni³

2021

IJAME

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In this study, cross-combination and square-combination configuration of the permanent external magnet were used in tungsten inert gas welding process. The external magnetic field effect to the arc plasma was observed using two cameras from the front view and side view. The depth of penetration and weld profile was investigated after welding. In this study, two types of magnets were employed; a 3 mm magnet with intensity ranging from 270-280 mT and a 5 mm magnet with 400-415 mT. Each configuration has three sub-configurations: forward, backward, and side, so there were 12 parameters in this study. The result shows that a cross-combination 5 mm magnet can increase weld penetration in any position, forward, backward or side deflection, and improve the depth-to-width ratio, however using 3 mm magnet did not influence the penetration significantly. Cross-combination has more stiffness and stability of the arc than square-combination. Most configurations have the same size weld bead width. Square combinations had fluctuated result, stiffness and stability of the arc was poor. This investigation aims to enlarge our understanding of the magnetic field effect on the arc plasma and the weld profile. In future, the arc blow effect from the external magnetic field can be controlled and regulated to improve TIG welding performance.

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“…The magnetic field perpendicular to the arc column has better constriction effect than the magnetic field parallel to this arc column. Constriction reduces the melted area with increased penetration [18].…”

Section: Introductionmentioning

confidence: 99%

Device Design for Electric Arc Electromagnetic Constriction

Antonello

Bracarense

2020

Soldag. insp.

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The difference of potential between two electrodes results in electric current breaking the dielectric barrier of the gas in this space causing a plasma discharge called electric arc. As a result, there is luminosity and an increase in temperature. Electric arc is used for welding and usually one of the electrodes is cylindrical with small diameter and the other with large area. Because of this configuration, the side section of the electric arc has a bell shape and forms a circular impression in contact with the work piece (the weld pool). With the use of electromagnetic forces, it is possible to change this circular impression, completely changing the behavior and consequently the geometry of the weld pool. This article presents the development and construction of a device for the electromagnetic constriction of the electric arc, capable of changing the cross section of the impression from circular to elliptical. The steps performed in the article were the simulation of the electromagnetic fields generated to change the electric arc shape, the development of the arc constriction device and the application of this electromagnetic constriction in beads on plate. The results show that the electromagnetic forces change the transverse profile of the arc from circular to elliptical, enabling the increase in specific power and a more precise orientation of the electric arc. Also, changing the orientation of the ellipse results in different penetration and width of the bead.

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Influence of cusp magnetic field configuration on K-TIG welding arc penetration behavior

Cited by 30 publications

References 26 publications

Influence of cusp external magnetic field on deposition rate of two-electrode TIG welding

Influence of cusp external magnetic field on deposition rate of two-electrode TIG welding

Study of Cross-Combination and Square-Combination Configuration Magnetic Field on Tungsten Inert Gas Welding

Device Design for Electric Arc Electromagnetic Constriction

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