Hybrid laser-arc welding in aerospace engineering

As thinner members are used in marine construction, the use of conventional joining techniques results in significant angular and buckling distortion due to the inherent high heat input with these processes. Several low heat input alternatives, including laser beam, gas metal arc, and hybrid laser arc welding, are explored. The paper focuses on process development, real time distortion measurements, and implementation of these processes.

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Study on the hybrid laser-arc welding of 3 mm thick high-strength steel with high speed

Materials Research Express ◽

10.1088/2053-1591/aaef4e ◽

2018 ◽

Vol 6 (2) ◽

pp. 026546 ◽

Cited By ~ 1

Author(s):

Zhang Peilei ◽

Gu Siyuan ◽

Liu Zhengjun ◽

Yu Zhishui

Keyword(s):

High Strength Steel ◽

Arc Welding ◽

High Speed ◽

High Strength ◽

Hybrid Laser Arc Welding

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Hybrid laser-arc welding of laser- and plasma-cut 20-mm-thick structural steels

Welding in the World ◽

10.1007/s40194-022-01255-y ◽

2022 ◽

Author(s):

Ömer Üstündağ ◽

Nasim Bakir ◽

Sergej Gook ◽

Andrey Gumenyuk ◽

Michael Rethmeier

Keyword(s):

Laser Beam ◽

Arc Welding ◽

Laser Beam Welding ◽

Digital Camera ◽

Welding Process ◽

Beam Power ◽

Beam Diameter ◽

Hybrid Laser Arc Welding ◽

Single Pass ◽

New Findings

AbstractIt is already known that the laser beam welding (LBW) or hybrid laser-arc welding (HLAW) processes are sensitive to manufacturing tolerances such as gaps and misalignment of the edges, especially at welding of thick-walled steels due to its narrow beam diameter. Therefore, the joining parts preferably have to be milled. The study deals with the influence of the edge quality, the gap and the misalignment of edges on the weld seam quality of hybrid laser-arc welded 20-mm-thick structural steel plates which were prepared by laser and plasma cutting. Single-pass welds were conducted in butt joint configuration. An AC magnet was used as a contactless backing. It was positioned under the workpiece during the welding process to prevent sagging. The profile of the edges and the gap between the workpieces were measured before welding by a profile scanner or a digital camera, respectively. With a laser beam power of just 13.7 kW, the single-pass welds could be performed. A gap bridgeability up to 1 mm at laser-cut and 2 mm at plasma-cut samples could be reached respectively. Furthermore, a misalignment of the edges up to 2 mm could be welded in a single pass. The new findings may eliminate the need for cost and time-consuming preparation of the edges.

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Laser and Hybrid Laser-Arc Welding

Joining Technologies ◽

10.5772/64522 ◽

2016 ◽

Author(s):

G.A. Turichin

Keyword(s):

Arc Welding ◽

Hybrid Laser Arc Welding

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Hybrid laser/arc welding of 304L stainless steel tubes, part 2 – Effect of filler wires on microstructure and corrosion behavior

International Journal of Pressure Vessels and Piping ◽

10.1016/j.ijpvp.2018.04.005 ◽

2018 ◽

Vol 163 ◽

pp. 45-54 ◽

Cited By ~ 15

Author(s):

Nima Yazdian ◽

Masoud Mohammadpour ◽

Reza Razavi ◽

Radovan Kovacevic

Keyword(s):

Stainless Steel ◽

Corrosion Behavior ◽

Arc Welding ◽

304L Stainless Steel ◽

Steel Tubes ◽

Hybrid Laser Arc Welding

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Structure and Crack Resistance of N-A-XTRA-70 Steel Joints Manufactured by Hybrid Laser-Arc Welding

Materials Science Forum ◽

10.4028/www.scientific.net/msf.927.29 ◽

2018 ◽

Vol 927 ◽

pp. 29-34 ◽

Cited By ~ 2

Author(s):

V. Pozniakov ◽

L. Markashova ◽

O. Berdnikova ◽

T. Alekseienko ◽

S. Zhdanov

Keyword(s):

Crack Resistance ◽

Welded Joints ◽

Arc Welding ◽

Structural Phase ◽

Consumable Electrode ◽

Phase Changes ◽

External Loading ◽

Hybrid Laser Arc Welding ◽

Source Power ◽

Scanning Electron

Crack resistance of welded joints is one of the most important indices of service reliability of critical designation structures. The purpose of the research is the establishment of the influence of technological modes, hybrid laser-arc welding of high strength steel NA-XTRA-70 on the formation of structure in the metal welded joints, as well as analysis of the influence of this structure on their crack resistances. For the experiments the laboratory setup has been developed on which the experiments were carried out in the technological scheme that provides the location of the consumable electrode arc at a certain distance in front of the laser beam in the welding direction. Nd: YAG-laser DY 044 of company ROFIN (Germany) was a laser radiation source. Power for consumable electrode arc was carried out by welding generator PSG-500. Investigations of structural-phase changes in weld metal and HAZ were carried out by means of optical microscopy (optical microscope Versamet-2 and Neophot-32), microhardness was measured using M-400 gage of Leco company at 0.98N loading. Fractographic investigations were carried out by scanning electron microscopy (scanning electron microscope SEM-515 of PHILIPS company, Netherlands) on fractured specimens of welded joints, made as a result of impact bend tests. An analysis of crack resistance of the welded joints was carried out under different conditions of test temperatures. It was based on experimental data, received by a quantitative fractography method. It is shown that metal of a welded joint produced by hybrid laser-arc welding at Vw = 72m/h rate has mainly failure of ductile nature after external loading. This indicates sufficient level of crack resistance and further working capacity under operation conditions.

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