Hybrid laser–arc welding

Olsen, Flemming Ove

doi:10.1533/9781845696528

Cited by 58 publications

(32 citation statements)

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“…However, it appears to be a minimal effect on the total depth of the weld pool [15]. The change of the hybrid weld geometry according to laser/arc power ratio also alters mechanical properties of the joint [16]. Chen et al [17] investigated the transition between conduction mode and keyhole mode with different energy ratios between laser and arc of CO 2 laser TIG paraxial hybrid welding.…”

Section: Introductionmentioning

confidence: 99%

Effect of power distribution on the weld quality during hybrid laser welding of an Al–Mg alloy

Leo

Renna

Casalino

et al. 2015

Optics & Laser Technology

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Section: Introductionmentioning

confidence: 99%

Effect of power distribution on the weld quality during hybrid laser welding of an Al–Mg alloy

Leo

Renna

Casalino

et al. 2015

Optics & Laser Technology

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“…As a result, hybrid laser-arc processes offer a higher gap bridging capability, an improved process performance and the possibility of a metallurgical manipulation of the weld by addition of filler metal. Extended overviews on the benefits and characteristics of hybrid laser-arc welding were among others given by Seyffarth and Krivtsun [1], Bagger and Olsen [2], Mahrle and Beyer [3] and Olsen [4].…”

Section: Introductionmentioning

confidence: 99%

Process characteristics of fibre-laser-assisted plasma arc welding

Mahrle¹,

Schnick²,

Rose³

et al. 2011

J. Phys. D: Appl. Phys.

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Abstract. Experimental and theoretical investigations on fibre-laser assisted plasma arc welding (LAPW) have been performed. Welding experiments were carried out on aluminium and steel sheets. In case of a highly focused laser beam and a separate arrangement of plasma torch and laser beam, high-speed video recordings of the plasma arc and corresponding measurements of the time-dependent arc voltage revealed differences in the process behaviour for both materials. In case of aluminium welding, a sharp decline in arc voltage and stabilization and guiding of the anodic arc root was observed whereas in steel welding the arc voltage was slightly increased after the laser beam was switched on. However, significant improvement of the melting efficiency with the combined action of plasma arc and laser beam was achieved for both types of material. Theoretical results of additional numerical simulations of the arc behaviour suggest that the properties of the arc plasma are mainly influenced not by a direct interaction with the laser radiation but by the laser induced evaporation of metal. Arc stabilization with increased current densities is predicted for moderate rates of evaporated metal only whereas metal vapour rates above a certain threshold causes a destabilization of the arc and reduced current densities along the arc axis.

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“…2,3 There has been intensive research done on hybrid laser/arc welding, including the microstructure characterization, 4,5 optimization and experimental investigation, [6][7][8] inspection and monitoring of the welding process, 9,10 and theoretical modeling. [11][12][13][14][15][16][17] However, the interaction between the laser radiation, the electric arc, and the material is still not well understood.…”

Section: Introductionmentioning

confidence: 99%

“…Laser welding combined with GMAW is characterized by wider and deeper welds, lower heat input that manifests lower distortion, good gap bridgeability, lower usage of laser power with respect to autogenous laser welding, higher welding speed, and improved weld quality. 2,3 In this study, hybrid laser/GMA welding was performed to join thick plates of high-strength steel in a square butt joint configuration. An XRD technique was applied to measure the surface residual stress of the welds.…”

Section: Introductionmentioning

confidence: 99%

Measurement of surface residual stresses and testing mechanical properties of high-strength steel butt joints obtained by hybrid laser/gas metal arc welding

Kong

Kovacevic

2013

The Journal of Strain Analysis for Engineering Design

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Hybrid laser/gas metal arc welding was applied to join the thick high-strength steel in square butt joints with narrow gaps. An X-ray diffraction technique was used to measure the surface residual stress distribution of high-strength steel by a hybrid laser/gas metal arc welding in a butt joint configuration. The influence of welding parameters, including welding speed and wire feeding rate, on the residual stress distribution and mechanical properties of the hybrid weld was experimentally studied. The obtained results show that there exist high compressive transverse and longitudinal residual stresses along the centerline of the weld. However, high tensile transverse and longitudinal stresses are located in the nearby heat-affected zone. An increase in the welding speed definitely decreases the residual stress concentration. A good weld quality of high-strength steel butt welds without cracking or defects can be achieved by a hybrid laser/gas metal arc welding technique. KeywordsLaser welding, gas metal arc welding, hybrid laser/gas metal arc welding, residual stress, X-ray diffraction technique Date

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Hybrid laser–arc welding

Cited by 58 publications

References 0 publications

Effect of power distribution on the weld quality during hybrid laser welding of an Al–Mg alloy

Effect of power distribution on the weld quality during hybrid laser welding of an Al–Mg alloy

Process characteristics of fibre-laser-assisted plasma arc welding

Measurement of surface residual stresses and testing mechanical properties of high-strength steel butt joints obtained by hybrid laser/gas metal arc welding

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