Numerical research on melt pool dynamics of oscillating laser-arc hybrid welding

Shi, Liming; Jiang, Laihege; Gao, Ming

doi:10.1016/j.ijheatmasstransfer.2021.122421

Cited by 38 publications

(6 citation statements)

References 22 publications

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“…In oscillating laser welding, it has been proved that the oscillatory behavior of a laser heat source has the advantages of improving forming, suppressing defects, refining grains and strengthening properties because of its special locus of motion [53,85]. Oscillating laser-arc hybrid welding (O-LAHW) has shown excellent metallurgical ability and wide adaptability in many types of material welding due to the advantages of both O-LAHW and arc integration [84,86].…”

Section: Oscillating Laser-arc Hybrid Weldingmentioning

confidence: 99%

A Review of Numerical Simulation of Laser–Arc Hybrid Welding

et al. 2023

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Laser–arc hybrid welding (LAHW) is known to achieve more stable processes, better mechanical properties, and greater adaptability through the synergy of a laser and an arc. Numerical simulations play a crucial role in deepening our understanding of this interaction mechanism. In this paper, we review the current work on numerical simulations of LAHW, including heat source selection laws, temperature field, flow field, and stress field results. We also discuss the influence of laser–arc interaction on weld defects and mechanical properties and provide suggestions for the development of numerical simulations of LAHW.

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Section: Oscillating Laser-arc Hybrid Weldingmentioning

confidence: 99%

A Review of Numerical Simulation of Laser–Arc Hybrid Welding

et al. 2023

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“…The complex fluid flow which could reduce weld porosity and improve the quality of welded joints was found in molten pool. Shi et al [13] studied the dynamic behaviors in molten pool during oscillating laser-arc hybrid welding and analyzed the molten pool profile and temperature field. The results indicated that the temperature field and stability of molten pool were improved.…”

Section: Introductionmentioning

confidence: 99%

The Analysis of Energy Distribution Characteristics of Molten Pool in Welding of Aluminum Alloy with Oscillating Laser

Yan

et al. 2023

Sustainability

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The energy distribution in molten pool is highly related to the quality of the weld formation in aluminum alloy welding. The forming defects in the weld are often improved by adjusting the molten pool dynamic behaviors affected by energy distribution. Therefore, the energy distribution characteristics in the molten pool during the welding of aluminum alloy with oscillating laser in the “∞” shaped path are explored in this paper. The pore defects are found to be greatly reduced in welds from the oscillating laser welding of aluminum alloy compared to those from non-oscillating laser welding. The corresponding distribution characteristics of energy in the molten pool of welding with oscillating laser are obtained and analyzed. The dynamic behaviors and forming process of welds under welding conditions of different distribution characteristics of energy in the molten pool are discussed. The obtained results are in good agreement with the experimental results. Therefore, the proposed method can provide the desired energy distribution for stable dynamic behaviors of molten pool to improve welding quality.

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“…In recent years, many scholars have studied the mechanism of laser-arc interaction and found that the laser can compress and guide the arc [7]. At the same time, the arc can strengthen the laser, dilute the plasma, and improve the absorption rate of the metal to the laser [8][9][10][11]. Laser-arc hybrid welding has the advantages of two heat source welding methods of laser and the conventional arc welding, and the interaction between the two heat sources makes up for the defects of a single heat source application.…”

Section: Introductionmentioning

confidence: 99%

Arc Characteristics and Welding Process of Laser K-TIG Hybrid Welding

Zhang

et al. 2022

Metals

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The Q235 steel plate butt joint was successfully welded by the laser K-TIG hybrid welding method. The effects of hybrid welding process parameters such as welding current, the distance between heat sources, laser power, laser defocusing amount, and welding speed on the coupled arc profile and welding process stability were studied. The results indicated that the laser deflects the K-TIG arc, and the deflection angle becomes smaller as the arc current increases. After K-TIG generates small holes, if the laser beam acts on the bottom of the keyhole, the welded depth can be further increased; however, the laser power has little effect on the welded depth. The distance between heat sources is the main factor affecting the state of laser-arc coupling. Optical microstructures of welded joints showed that the grains in the arc zone were coarser than those in the laser zone, and there are more columnar crystals in the fusion zone. The microhardness of the weld center is significantly higher than that of the base metal, up to 220 HV. At the same time, the change of tensile strength of the weld under the influence of a single parameter was analyzed, and it was found that tensile properties of the weld first increased and then decreased with the increase of K-TIG arc current I, heat source distance D, and welding speed V, respectively. With the increase of laser power P, it first decreased and then increased, and with the increase of laser defocusing amount δf, it showed a downward trend.

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Numerical research on melt pool dynamics of oscillating laser-arc hybrid welding

Cited by 38 publications

References 22 publications

A Review of Numerical Simulation of Laser–Arc Hybrid Welding

A Review of Numerical Simulation of Laser–Arc Hybrid Welding

The Analysis of Energy Distribution Characteristics of Molten Pool in Welding of Aluminum Alloy with Oscillating Laser

Arc Characteristics and Welding Process of Laser K-TIG Hybrid Welding

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