Gap bridging ability in laser beam welding of thin aluminum sheets

Schultz, Villads; Seefeld, Thomas; Vollertsen, Frank

doi:10.2351/1.5063044

Cited by 5 publications

(3 citation statements)

References 10 publications

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“…The keyhole created and maintained during laser (keyhole) welding can penetrate very deeply into metallic materials, providing high-intensity welding with a single-mode and very small spot size. [11][12][13]. In laser welding, the protective atmosphere has a significant effect on decrease the porosity in the weld joints and increasing the depth of penetration.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Process Parameters on the Microstructure and Mechanical Properties of AW5083 Aluminum Laser Weld Joints

Vyskoč

Dománková

Jurči

et al. 2020

Metals

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In this article, the effect of process parameters on the microstructure and mechanical properties of AW5083 aluminum alloy weld joints welded by a disk laser were studied. Butt welds were produced using 5087 (AlMg4.5MnZr) filler wire, with a diameter of 1.2 mm, and were protected from the ambient atmosphere by a mixture of argon and 30 vol.% of helium (Aluline He30). The widest weld joint (4.69 mm) and the highest tensile strength (309 MPa) were observed when a 30 L/min shielding gas flow rate was used. Conversely, the narrowest weld joint (4.15 mm) and the lowest tensile strength (160 MPa) were found when no shielding gas was used. The lowest average microhardness (55.4 HV0.1) was recorded when a 30 L/min shielding gas flow rate was used. The highest average microhardness (63.9 HV0.1) was observed when no shielding gas was used. In addition to the intermetallic compounds, β-Al3Mg2 and γ-Al12Mg17, in the inter-dendritic areas of the fusion zone (FZ), Al49Mg32, which has an irregular shape, was recorded. The application of the filler wire, which contains zirconium, resulted in grain refinement in the fusion zone. The protected weld joint was characterized by a ductile fracture in the base material (BM). A brittle fracture of the unshielded weld joint was caused by the presence of Al2O3 particles. The research results show that we achieved the optimal welding parameters, because no cracks and pores were present in the shielded weld metal (WM).

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Section: Introductionmentioning

confidence: 99%

The Effect of Process Parameters on the Microstructure and Mechanical Properties of AW5083 Aluminum Laser Weld Joints

Vyskoč

Dománková

Jurči

et al. 2020

Metals

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“…In recent years, research, developments, and practical applications of additive manufacturing (AM) technologies such as three-dimensional (3D) printing processes have been actively carried out [1][2][3][4][5][6]. As opposed to traditional subtractive manufacturing methodologies, AM technology is to continuously accumulate materials by adding layerby-layer and complete the 3D parts through computer-controlled technology [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Derivation of Appropriate Conditions for Additive Manufacturing Technology Using Hot-Wire Laser Method

Zhu

Nakahara

Aono³

et al. 2021

The 1st International Electronic Conference on Metallurgy and Metals

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The aim of this research was to develop a high-efficiency and high-material-use additive manufacturing technology using the hot-wire laser method. In this study, the optimization of process conditions using a combination of a high-power diode laser with a relatively large rectangular laser spot and a hot-wire system was investigated. The effects of process parameters such as laser power, process speed, and wire feeding rate (wire feeding speed/process speed) on a bead appearance and cross-sectional characteristics (e.g., effective width, effective height, maximum height, and near net shape rate) were studied in detail. The process phenomena during the multi-layer deposition were investigated by in situ observation via a high-speed camera.

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“…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. They stated that, after a successful process initialization, the gap bridging ability increased significantly to 315% of the sheet thickness.…”

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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Gap bridging ability in laser beam welding of thin aluminum sheets

Cited by 5 publications

References 10 publications

The Effect of Process Parameters on the Microstructure and Mechanical Properties of AW5083 Aluminum Laser Weld Joints

The Effect of Process Parameters on the Microstructure and Mechanical Properties of AW5083 Aluminum Laser Weld Joints

Derivation of Appropriate Conditions for Additive Manufacturing Technology Using Hot-Wire Laser Method

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

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