Experiment and prediction of weld morphology for laser oscillating welding of AA6061 aluminium alloy

Wang, Lei; Gao, Ming; Zeng, Xiaoyan

doi:10.1080/13621718.2018.1551853

Cited by 45 publications

(12 citation statements)

References 20 publications

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“…The transient heat transfer model is validated by the experimental results from the literature [40,50]. A total number of around 800 numerical simulations were carried out which serve as a base for the discussed results.…”

Section: Resultsmentioning

confidence: 99%

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Numerical modelling of thermal quantities for improving remote laser welding process capability space with consideration to beam oscillation

Mohan

Ceglarek

Auinger

2022

Int J Adv Manuf Technol

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This research aims to explore the impact of welding process parameters and beam oscillation on weld thermal cycle during laser welding. A three-dimensional heat transfer model is developed to simulate the welding process, based on finite element method. The results obtained from the model pertaining to thermal cycle and weld morphology are in good agreement with experimental results found in the literature. The developed heat transfer model can quantify the effect of welding process parameters (i.e. heat source power, welding speed, radius of oscillation, and frequecy of oscillation) on the intermediate performance indicators (IPIs) (i.e. peak temperature, heat-affected zone (HAZ) volume, and cooling rate). Parametric contour maps for peak temperature, HAZ volume, and cooling rate are developed for the estimation of the process capability space. An integrated approach for rapid process assessment, and process capability space refinement, based on IPIs is proposed. The process capability space will guide the identification of the initial welding process parameters window and helps in reducing the number of experiments required by refining the process parameters based on the interactions with the IPIs. Among the IPIs, the peak temperature indicates the mode of welding while the HAZ volume and cooling rate represent weld quality. The regression relationship between the welding process parameters and the IPIs is established for quick estimation of IPIs to replace time-consuming numerical simulations. The application of beam oscillation widens the process capability space, making the process parameter selection more flexible due to the increase in distance from the tolerance boundaries.

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Section: Resultsmentioning

confidence: 99%

“…Due to the smaller volume of the molten pool, weld beads with reduced widths are formed. In the third step, the model is translated from no oscillation to beam oscillation condition for a varying radius of oscillation using experimental data from the literature [50] which is shown in Fig. 5f.…”

Section: Model Validationmentioning

confidence: 99%

Numerical modelling of thermal quantities for improving remote laser welding process capability space with consideration to beam oscillation

Mohan

Ceglarek

Auinger

2022

Int J Adv Manuf Technol

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“…2 of 11 et al [23] investigated the influences of beam oscillating parameters on the weld appearance during the laser welding of austenitic stainless steel. Wang et al [24,25] found that beam oscillation stabilized the process and improved weld morphology. Furthermore, the elongation of welds was increased.…”

Section: Appl Sci 2019 9 X For Peer Reviewmentioning

confidence: 99%

Microstructure and Mechanical Properties of Fiber Laser Welding of Aluminum Alloy with Beam Oscillation

et al. 2019

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Laser welding with beam oscillation is applied to join aluminum alloy plates in butt configuration. The effects of beam oscillating patterns on the quality of welds are compared and analyzed. The results indicate that beam oscillation can improve the weld formation and microstructure of butt joints. The circular oscillating weld has the features of fine grain and uniformly dispersed dendrites in the strengthening phase, and the porosity inhibitory effect of circular oscillation is the most obvious. In addition, beam oscillation has few effects on the tensile strength of welds, but exerts an influence on the elongation of welds.

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“…Hao et al [11] showed the effects of laser beam oscillation parameters on the laser-welded austenitic stainless steel joints. Wang et al [12,13] stated that the laser beam oscillation stabilized the welding process and improved the welding morphology. Kuryntsev and Gilmutdinov [14] investigate the influence of the second wobbling laser welding pass on microstructure and mechanical properties of structural steel.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Laser Beam Wobbling Mode on Weld Bead Geometry of Tailor Welded Blanks

Yüce¹

2020

acperpro

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As a higher weight leads to increased fuel consumption for the automobile industry, the body in white must be lighter to compensate for the weight of additional components. Therefore, tailored blanks are used, which reinforce the body in white only in areas where a higher strength or stiffness is necessary. The applicability of laser welding processes with its numerous advantages, such as low heat input and production efficiency, is often limited when joining imperfect edges steel sheets due to small gap bridging ability. To overcome this limit, recent developments in the laser industry have introduced a novel method to wider the applications of lasers through the utilization of fast beam oscillation techniques, also known as laser beam wobbling. In this study, the effects of the four different amplitudes (0.5 mm, 1 mm, 1.5 mm and 2 mm) of circular laser beam oscillation patterns on the weld bead geometry and microhardness distribution were investigated. The results revealed that the weld bead width increased with the increase of wobble amplitude. Moreover, the tensile strengths of the welded blanks were higher than the AHSS base metal for all amplitude levels.

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Experiment and prediction of weld morphology for laser oscillating welding of AA6061 aluminium alloy

Cited by 45 publications

References 20 publications

Numerical modelling of thermal quantities for improving remote laser welding process capability space with consideration to beam oscillation

Numerical modelling of thermal quantities for improving remote laser welding process capability space with consideration to beam oscillation

Microstructure and Mechanical Properties of Fiber Laser Welding of Aluminum Alloy with Beam Oscillation

The Effect of Laser Beam Wobbling Mode on Weld Bead Geometry of Tailor Welded Blanks

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