Investigation of the influence of welding parameters on the weld geometry when welding structural steel with oscillated high-power laser beam

Grünenwald, Stefan; Unt, Anna; Salminen, Antti

doi:10.1016/j.procir.2018.08.150

Cited by 15 publications

(5 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The effects of oscillating parameters on H M are drawn in Figure 12 according to Equation (12). The H M is 18.15 when D = 0.4 mm, which is higher than the threshold of 8.92 and is corresponding to keyhole mode for all oscillating frequency.…”

Section: Cross-sectional Morphologymentioning

confidence: 99%

“…According to the threshold and the Equations ( 9)-( 11), the a can be calculated as 4.63. Then, the modified normalised enthalpy of laser oscillating welding, H M can be calculated by Equation (12). The welding transfers from keyhole mode to conduction mode or mix mode when the H M decreases to πT b /T m (8.92 for AA6061 alloy) or lower.…”

Section: Cross-sectional Morphologymentioning

confidence: 99%

“…Hao et al found that the morphologies of laser-welded stainless steel are varied with the frequency and amplitude of transversal beam oscillation, but Yamazaki et al pointed out that the spatter easily occurred at reversal points in transversal oscillation [10, 11]. Stefan suggested that welds are more uniform in shape as increasing the frequency in the laser transversally welding of structural steel [12]. Martukanitz et al found that the width of the fusion zone was increased, and the weld porosity was decreased by circular oscillation in laser welding of 6013-T4 Al alloy [13].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Wang

Gao

Zeng

2019

Science and Technology of Welding and Joining

View full text Add to dashboard Cite

Effects of oscillating diameter ( D) and frequency ( f) on weld surface and cross-sectional morphologies were investigated in laser welding of AA6061 aluminium alloy with circular beam oscillation. Weld surface was mainly characterised by straight line shape when f > 10 Hz. Weld cross-section transformed from slender nail to irregular shape, dumpy nail, rectangle and crescent shape in sequence with the increase of D and f. A modified model considering material thermal properties was developed to predict the surface feature, especially whether the weld totally overlapped or not. A new normalised enthalpy was proposed to predict the keyhole mode of laser oscillating welding by considering materials thermal properties and remelting effect, which was suitable to explain the formation of cross-sectional morphology.

show abstract

Section: Cross-sectional Morphologymentioning

confidence: 99%

Section: Cross-sectional Morphologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Wang

Gao

Zeng

2019

Science and Technology of Welding and Joining

View full text Add to dashboard Cite

show abstract

“…As noted by Rubben et al [10], who first developed wobble laser beam welding, it was claimed that it could increase the gap tolerance of tailor welded blanks to 25% of the sheet thickness. Grünenwald et al [18] found that the laser power and welding speed were the most significant factors on FZ dimension, while beam wobbling and focal position were secondary.…”

Section: Introductionmentioning

confidence: 99%

Effect of beam wobbling on microstructure and hardness during laser welding of X70 pipeline steel

Yang

Chen

Huda

et al. 2022

Science and Technology of Welding and Joining

View full text Add to dashboard Cite

Laser welding with beam wobbling was employed to weld X70 pipeline steel. The influence of beam wobbling on weld surface morphology, fusion zone microstructure, and microhardness was investigated. The formation of spatter was suppressed by beam wobbling using a beam with higher energy density. At a welding speed of 1.0 m min −1 , the weld metal produced with a circular laser wobble pattern contained more martensite but less ferrite, compared to that of static spot welded joint. The presence of more martensite led to the increase in fusion zone hardness. A softened region was found in the inter-critical heat-affected zone. The hardness of the softened region could be improved by increasing the welding speed (from 1.0 to 1.5 m min −1 ).

show abstract

“…They observed that with beam oscillation, the position tolerance of the filler wire could be increased significantly. Grünenwald et al [9] conducted a high-power fiber laser welding with beam oscillation to produce bead on plate welds to investigate the influence of the oscillation frequency on the shape of the weld cross-section. Schultz et al [10] investigated the influence of the welding speed, wire feed speed and beam oscillation parameters on wire melting behavior.…”

Section: Introductionmentioning

confidence: 99%

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

Yüce¹

2020

acperpro

View full text Add to dashboard Cite

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.

show abstract

Investigation of the influence of welding parameters on the weld geometry when welding structural steel with oscillated high-power laser beam

Cited by 15 publications

References 11 publications

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

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

Effect of beam wobbling on microstructure and hardness during laser welding of X70 pipeline steel

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

Contact Info

Product

Resources

About