Study of high-speed GMAW assisted by compound external magnetic field

Chen, Qiang; Chen, Ji; Lu, Sufen; Zhang, Yanteng; Chen, Wu

doi:10.1007/s40194-020-00882-7

Cited by 14 publications

(15 citation statements)

References 20 publications

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“…TL is the zone closed to the MZ, containing the mushy zone and the high temperature heat affected zone, causing the high cooling rate compared with that of FHAZ, and thus Widmanstatten α'-grains is in the form of course grains and boundary α m -grains is also observed in TL. During laser-MIG hybrid welding, the morphological instability of dendrite is attributed to the external magnetic force calculated by welding current and magnetic eld intensity [14]. As shown in Fig.…”

Section: Microstructurementioning

confidence: 95%

“…Thus, it is necessary to propose an effective method to assist Laser-MIG hybrid welding process, which reduces the unsatisfactory microstructure and improve mechanical property in the weakest zones. Therefore, external magnetic eld is applied to assist welding process to improve the welding structure and properties [12][13][14][15][16][17][18][19]. In laser welding, welding process will be affected when magnetic eld threshold exceeds 200 mT.…”

Section: Introductionmentioning

confidence: 99%

“…It concludes that the alternating magnetic eld can produce bene cial effect to inhibit gravitational drop-out and sagging of the weld. Chen et al [14] study the in uence of magnetic eld on weld appearance interfacial microstructure and mechanical properties during the high-speed GMAW,, the result shows that magnetic eld can e ciently soft the weld seam, decrease the undercut defect, improve the weld mechanical properties. However, the welding process will be considerably affected when the magnetic eld threshold is less than 50 mT for the arc welding.…”

Section: Introductionmentioning

confidence: 99%

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Effect of transverse magnetic field on microstructure and mechanical properties of Ti-6Al-4 V manufactured by Laser-MIG hybrid welding

Chen

Yin²

2022

Int J Adv Manuf Technol

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In this paper, the external transverse magnetic eld is used to assist the laser-MIG hybrid welding for Ti-6Al-4V (TC4). The microstructure and mechanical properties such as microhardness and tensile properties of the weld joints under 24 mT external magnetic eld (EMF) and the referring weld joint without EMF are investigated and discussed. Results show that transfer layer (TL) performs the lowest microhardness in the weld seam and tensile specimens fail in this area for the referring weld joint without EMF, which indicates the TL is the weakest zone in the weld seam. The mechanical properties of weld seam improve signi cantly under 24 mT EMF, which average microhardness in TL increases 9.3% and failure stress of tensile specimens improve by 16.7%, whilst a mixed fracture mode is operative in the fracture surfaces. The research reveals the elementary microstructure of TC4 laser-MIG hybrid welding is in correlation to welding heat input under the in uence of EMF.

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Section: Microstructurementioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of transverse magnetic field on microstructure and mechanical properties of Ti-6Al-4 V manufactured by Laser-MIG hybrid welding

Chen

Yin²

2022

Int J Adv Manuf Technol

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“…The forward inclined arc is benefit to relief the backward of molten metal, and the swing motion of arc can promote the transverse flow in molten pool. Based on this idea, Chen et al [26,[85][86][87] proposed a compound magnetic field, as shown in Figure 9c, consisted of a TMF (B 1 ) and an alternating magnetic field (B 2 and B 3 ) at an angle of 45°to the transverse direction. The arc morphology and droplet morphology during compound external magnetic field (CEMF) are shown in Figure 9a,b.…”

Section: Magnetic Field-assisted Gmaw Weldingmentioning

confidence: 99%

Effects of Magnetic Fields in Arc Welding, Laser Welding, and Resistance Spot Welding: A Review

Shi

Cui

et al. 2022

Adv Eng Mater

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The application of magnetic field in welding process has been proved to be effective in improving the mechanical properties of welded joints and is regarded as a practicable auxiliary welding method. Although the theoretical research on magnetic field‐assisted welding is quite abundant, there is still a long way to go before a stable industrial application is achieved. Therefore, to clarify magnetic field and compare its roles in various welding techniques, this work carefully examines the use of magnetic field in recent welding techniques such as laser welding, laser‐melt inert gas hybrid welding, gas metal arc welding, tungsten inert gas welding, and resistance spot welding. Based on previous experiments and simulation research results, the effects of the Lorentz force on the arc, molten pool, and dendrite solidification during welding as well as the microstructure and mechanical properties of welded joints are discussed. The purpose of this work is to give a superficial introduction to the magnetic field‐assisted welding method in recent years, hoping to improve the welding practitioners’ understanding of the magnetic‐assisted welding method and provide a reference for researchers who use different welding methods.

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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%

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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Study of high-speed GMAW assisted by compound external magnetic field

Cited by 14 publications

References 20 publications

Effect of transverse magnetic field on microstructure and mechanical properties of Ti-6Al-4 V manufactured by Laser-MIG hybrid welding

Effect of transverse magnetic field on microstructure and mechanical properties of Ti-6Al-4 V manufactured by Laser-MIG hybrid welding

Effects of Magnetic Fields in Arc Welding, Laser Welding, and Resistance Spot Welding: A Review

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

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