Hybrid laser-arc welding of thick-walled ferromagnetic steels with electromagnetic weld pool support

Üstündağ, Ömer; Fritzsche, André; Avilov, Vjaceslav; Gumenyuk, Andrey; Rethmeier, Michael

doi:10.1007/s40194-018-0597-3

Cited by 19 publications

(11 citation statements)

References 5 publications

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“…This seam is inadmissible according to the standard EN ISO 12932. With the use of an oscillating magnetic field, the weld shape formation corresponded to a typical wine-cup shape, and the sagging could be avoided as already shown in [5,24] (see Figure 6b). The AC magnet was operated at an oscillating frequency of 1.2 kHz and a magnet power of 1.8 kW.…”

Section: Resultsmentioning

confidence: 53%

“…The electromagnetic weld pool support was demonstrated successfully for single-pass LBW [12] and for HLAW [24]. Figure 3 shows the AC electromagnetic weld pool support system used for the LBW or HLAW of thick metal parts.…”

Section: Electromagnetic Weld Pool Influencementioning

confidence: 99%

“…A small part of the exponentially decaying magnetic field on the upper surface of the sample could affect the operation of the arc. This optimization was performed in [24], where it was shown that the amplitude of oscillation of the arc along the welding direction on the order of 1 mm did not have a significant effect on the weld shape geometry.…”

Section: Electromagnetic Weld Pool Influencementioning

confidence: 99%

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Improvement of Filler Wire Dilution Using External Oscillating Magnetic Field at Full Penetration Hybrid Laser-Arc Welding of Thick Materials

Üstündağ

Avilov

Gumenyuk

et al. 2019

Metals

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Hybrid laser-arc welding offers many advantages, such as deep penetration, good gap bridge-ability, and low distortion due to reduced heat input. The filler wire which is supplied to the process is used to influence the microstructure and mechanical properties of the weld seam. A typical problem in deep penetration high-power laser beam welding with filler wire and hybrid laser-arc welding is an insufficient mixing of filler material in the weld pool, leading to a non-uniform element distribution in the seam. In this study, oscillating magnetic fields were used to form a non-conservative component of the Lorentz force in the weld pool to improve the element distribution over the entire thickness of the material. Full penetration hybrid laser-arc welds were performed on 20-mm-thick S355J2 steel plates with a nickel-based wire for different arrangements of the oscillating magnetic field. The Energy-dispersive X-ray spectroscopy (EDS) data for the distribution of two tracing elements (Ni and Cr) were used to analyze the homogeneity of dilution of the filler wire. With a 30 • turn of the magnetic field to the welding direction, a radical improvement in the filler material distribution was demonstrated. This would lead to an improvement of the mechanical properties with the use of a suitable filler wire.

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Section: Resultsmentioning

confidence: 53%

Section: Electromagnetic Weld Pool Influencementioning

confidence: 99%

Section: Electromagnetic Weld Pool Influencementioning

confidence: 99%

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Improvement of Filler Wire Dilution Using External Oscillating Magnetic Field at Full Penetration Hybrid Laser-Arc Welding of Thick Materials

Üstündağ

Avilov

Gumenyuk

et al. 2019

Metals

Self Cite

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“…The magnet was positioned 2 mm below the weld specimen and operated with an oscillating frequency of 1150 Hz, an AC power of 770 W and a magnetic flux density of 50 mT. This magnet parameters were chosen from previous study for welding the same materials thicknesses [20]. The oscillating frequency has an influence on the skin layer depth.…”

Section: Methodsmentioning

confidence: 99%

Influence of oscillating magnetic field on the keyhole stability in deep penetration laser beam welding

Üstündağ¹,

Bakir²,

Gumenyuk³

et al. 2021

Optics & Laser Technology

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“…This problem is solved by using a hybrid system, which adds filler material to the melting pool by means of an electric arc, filling the weld holes during the joining process [48]. In this line, studies carried out in Reference [57] indicate that, using the parameters suitable for the hybrid process, the tolerance of the spacing between sheets can be increased by a factor of three or four, depending on the materials and equipment used, if compared with autogenous laser welding [57,58]. In Reference [46] it is indicated that the greater benefits of hybrid welding compared to autogenous laser welding is the increase in the tolerance of the spacing between workpieces, being able to execute a sound weld with spacing in the order of 1 mm [46].…”

Section: Gradementioning

confidence: 99%

Laser Hybrid Butt Welding of Large Thickness Naval Steel

Churiaque

Chludzinski

Porrúa-Lara³

et al. 2019

Metals

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Plates joining is one of the first stage at large vessels manufacturing line, process conditioning the whole shipbuilding production. Laser Arc Hybrid Welding (LAHW) process is nowadays providing promising results for large thickness naval steel, being primarily used for welding plates with thicknesses between 6 to 15 mm, reaching up to 51 mm. In addition to this high penetration ability, LAHW allows increasing the production rates. Therefore, this technology is proposed as an alternative to conventional welding processes in shipbuilding, as it integrates the advantages of laser and arc welding, providing high process stability, high welding speed and penetration, narrow weld beads with a low heat input and good metallurgical properties. The present review reports the most representative investigation regarding the use of this technology to join large thickness flat panels of naval steel. It includes a summary of the most influential process variables, equipment characteristics, material properties, naval regulations, as well as microstructural characterisation and mechanical properties of joints. This review is thought to help readers from different backgrounds, covering from non-expert on welding or on naval sector, to industrial LAHW applicators and researchers. The industrial need of performing one single pass procedure to assure high quality welds of high thickness is suggested as one of the key aspects for future investigations.

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Hybrid laser-arc welding of thick-walled ferromagnetic steels with electromagnetic weld pool support

Cited by 19 publications

References 5 publications

Improvement of Filler Wire Dilution Using External Oscillating Magnetic Field at Full Penetration Hybrid Laser-Arc Welding of Thick Materials

Improvement of Filler Wire Dilution Using External Oscillating Magnetic Field at Full Penetration Hybrid Laser-Arc Welding of Thick Materials

Influence of oscillating magnetic field on the keyhole stability in deep penetration laser beam welding

Laser Hybrid Butt Welding of Large Thickness Naval Steel

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