Melting behavior in ultrasonic-assisted narrow-gap laser welding with filler wire

Chen, Xiang; Fu, Juan; Zhao, Yixin; Jiang, Yumo; Yan, Keng; Jiang, Caiping; Chen, Jinlu

doi:10.2351/7.0000207

Cited by 9 publications

(3 citation statements)

References 16 publications

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“…To further improve the welding quality of the joint, in recent years, numerous scholars have developed various welding‐assisted methods. For instance, magnetic field‐assisted, [ 1 ] ultrasonic‐assisted, [ 2,3 ] induction heating‐assisted, [ 4,5 ] laser‐assisted, [ 6,7 ] vibration‐assisted, [ 8,9 ] and arc‐assisted laser welding [ 10 ] (LW) are applied. The magnetic field‐assisted welding method, in particular, has garnered a lot of attention and interest because of its simple components, low cost, and effective weld formation.…”

Section: Introductionmentioning

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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Section: Introductionmentioning

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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“…Among the many welding methods for thick plates, narrow gap welding has the advantages of low heat input, small deformation, and high welding efficiency. Therefore, to improve the welding quality of thick plates, some researchers have proposed a welding method combining laser arc hybrid welding with a narrow gap [7,8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Alternating Magnetic Field on Arc Plasma Characteristics and Droplet Transfer during Narrow Gap Laser-MIG Hybrid Welding

Cai

Zhao

et al. 2021

Metals

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In this paper, the morphological characteristics of arc plasma and droplet transfer during the alternating magnetic field-assisted narrow gap groove laser-MIG (metal inert gas) hybrid welding process were investigated. The characteristics of arc plasma and droplet transfer, electron temperature, and density were analyzed using a high-speed camera and spectrum diagnosis. Our results revealed that the arc maintained a relatively stable state and rotated at a high speed to enhance the arc stiffness, and further improved the stability of the arc under the alternating magnetic field. The optimum magnetic field parameters in this experiment were B = 16 mT and f = 20 Hz, the electron temperature was 9893.6 K and the electron density was 0.99 × 1017 cm−3 near the bottom of the groove, which improved the temperature distribution inside the narrow gap groove and eliminated the lack of sidewall fusion defect. Compared to those without a magnetic field, the magnetic field could promote droplet transfer, the droplet diameter decreased by 17.6%, and the transition frequency increased by 23.5% (owing to the centrifugal force during droplet spinning and electromagnetic contraction force). The width of the weld bead was increased by 12.4% and the pores were also significantly reduced due to the stirring of the magnetic field on the molten pool.

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“…This is because tungsten argon arc welding has the advantages of low cost, stable welding process and attractive weld seam formation [2]. Compared with conventional fusion welding, laser-arc hybrid welding has gained widespread attention as a high-e ciency and high-quality welding technology with excellent accuracy, superior performance and low post-weld deformation [3][4][5].…”

mentioning

confidence: 99%

Effect of beam defocusing on porosity formation mechanism in laser-MIG hybrid welded titanium alloy joints

He,

Zhao,

Chen

et al. 2024

Int J Adv Manuf Technol

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In this paper, laser-MIG hybrid welding was applied to weld TC4 titanium alloy with a thickness of 5 mm.Based on the scanning electron microscopy (SEM) analysis it was determined that the porosity of the laser-MIG hybrid welded joints was mainly process porosity. The evolution of the keyhole under different defocusing amount conditions were observed using a high-speed camera. The in uence of the beam defocusing amount on the keyhole stability was analyzed in detail and the formation mechanism of the process-type porosity was elucidated. By adjusting the defocusing amount to stabilize the keyhole morphology, the pores in the weld were eliminated. With the defocusing amounts of + 2, 0, -2, and − 4 mm the keyhole stability was poor. And the highest porosity in the weld was 4.21% when the defocusing amount was − 2 mm. The keyhole only collapsed at the root and the porosity decreased more than 80% when the defocusing amounts were + 4 and − 6 mm. The keyhole was in a stable state and no porosity was generated in the weld when the defocusing amount was + 6mm.

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Melting behavior in ultrasonic-assisted narrow-gap laser welding with filler wire

Cited by 9 publications

References 16 publications

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

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

Effect of Alternating Magnetic Field on Arc Plasma Characteristics and Droplet Transfer during Narrow Gap Laser-MIG Hybrid Welding

Effect of beam defocusing on porosity formation mechanism in laser-MIG hybrid welded titanium alloy joints

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