Gap bridging for two modes of laser arc hybrid welding

Lamas, Javier; Frostevarg, Jan; Kaplan, Alexander

doi:10.1016/j.jmatprotec.2015.04.022

Cited by 21 publications

(4 citation statements)

References 16 publications

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“…Kawahito et al [14,15] investigated the effect of the laser peak power on a gap in LBW, and the laser peak power was adjusted adaptively to reduce the under ll defect caused by the gap. Furthermore, in many studies, laser-arc hybrid welding (LAHW) was applied using a ller wire to improve the gap-bridging capacities [16][17][18][19][20][21]. Brandizzie et al [19] compared an LBW joint without a ller wire under the no-gap condition and an LAHW joint with a ller wire under the conditions of a 0.6mm gap to a BM with a thickness of 3.0 mm, thereby realising full penetration and a similar maximum stress.…”

Section: Introductionmentioning

confidence: 99%

Overcoming underfill defect with undermatching filler and establishing new acceptance criteria for underfill depth in laser beam welding of ultra-high strength steels

Lee,

Park,

Seon

et al. 2023

Preprint

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This study investigated the laser-beam-weld geometry and tensile properties under various butt-joint gap conditions for 2.3-mm thick ultra-high strength steels (UHSSs) as function of the use of undermatching filler. An undermatching filler wire having a yield strength of 430 MPa was used to overcome the underfill. Without the filler, the tensile properties were acceptable under a gap of up to 0.2 mm, which is less than 10% of the base metal (BM) thickness. With the filler, the gap tolerance increased to 0.5 mm, and the undermatching filler was proven to overcome the underfill issue. The underfill-depth acceptance criterion for realising good tensile properties was defined as 0.39 mm (= 17% of UHSSs’ thickness), which was significantly higher than the currently defined American Welding Society specification (7% of UHSSs’ thickness). These optimisation criteria can be used as guidelines for the butt joints of laser beam welding in UHSSs.

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Section: Introductionmentioning

confidence: 99%

Overcoming underfill defect with undermatching filler and establishing new acceptance criteria for underfill depth in laser beam welding of ultra-high strength steels

Lee,

Park,

Seon

et al. 2023

Preprint

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“…Laser-MAG arc hybrid welding has the superiorities of good process stability, less total thermal input, good clearance bridging ability and high production efficiency [1][2][3][4]. Zhang et al [5]established the advantages of laser arc hybrid welding.…”

Section: Introductionmentioning

confidence: 99%

Research on Residual Stress Distribution in Different Areas of Laser-MAG Arc Hybrid Welding by Numerical Simulation

Qian

Hou

et al. 2022

J. Phys.: Conf. Ser.

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In this research, through experiments and numerical simulations, the residual stress distribution of the top and bottom surfaces of the laser (TruDisk16002)-arc (MAG) hybrid welding seam and the weld cross-section are studied. The results show that when the arc power is 6.5KW and the laser power is 7.5KW, the weld is formed well. The residual stress on the bottom surface near the weld is higher than that on the top surface. The laser zone in the center of the weld has the largest residual stress, the arc zone is smaller, and the mixed zone is the smallest. The laser zone has the largest residual stress at the fusion line and the heat-affected zone, followed by the mixed zone, and the arc zone is the smallest. followed by the mixed zone, and the arc zone has the smallest.

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“…Recently, researchers have begun to focus on the effects of the arc modes on LAHW characteristics. Lamas et al [27] indicated that the CMT mode had higher welding speeds, less heat input, and fewer undercut defects compared to other arc modes during LAHW for high strength steel. Li et al [28] pointed out that compared with the LPMHW process for mild steel, the plasma was more stable and the spatter was less in the laser-CMT hybrid welding (LCHW) process.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Laser-Arc Hybrid Welding for AA6082-T6 Aluminum Alloy with Two Different Arc Modes

Han¹,

Yang

Ma³

et al. 2020

Metals

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The effects of arc modes on laser-arc hybrid welding for AA6082-T6 aluminum alloy were comparatively studied. Two arc modes were employed: pulsed metal inert gas arc and cold metal transfer arc. The results indicated that joints without porosity, undercutting, or other defects were obtained with both laser-pulsed metal inert gas hybrid welding (LPMHW) and laser-cold metal transfer hybrid welding (LCHW). Spatter was reduced, and even disappeared, during the LCHW process. The sizes of equiaxed dendrites and the width of the partially melted zone in the LPMHW joint were larger than those in the LCHW joint. The microhardness in each zone of the LPMHW joint was lower than that of the LCHW joint. The softening region in the heat-affected zone of the LPMHW joint was wider than that of the LCHW joint. The tensile strength of the LCHW joint was higher than that of the LPMHW joint. For the two joints, the fractures all occurred in the softening region in the heat-affected zone, and the fracture morphologies showed ductile fracture features. The dimples in the fractograph of the LCHW joint were deeper than those of the LPMHW joint.

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Gap bridging for two modes of laser arc hybrid welding

Cited by 21 publications

References 16 publications

Overcoming underfill defect with undermatching filler and establishing new acceptance criteria for underfill depth in laser beam welding of ultra-high strength steels

Overcoming underfill defect with undermatching filler and establishing new acceptance criteria for underfill depth in laser beam welding of ultra-high strength steels

Research on Residual Stress Distribution in Different Areas of Laser-MAG Arc Hybrid Welding by Numerical Simulation

Comparative Study of Laser-Arc Hybrid Welding for AA6082-T6 Aluminum Alloy with Two Different Arc Modes

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