Process characteristics of fibre-laser-assisted plasma arc welding

Mahrle, Achim; Schnick, Michael; Rose, Sascha; Demuth, Cornelius; Beyer, Eckhard; Füssel, Uwe

doi:10.1088/0022-3727/44/34/345502

Cited by 45 publications

(22 citation statements)

References 15 publications

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“…Indeed, these comparatively low laser intensities are even found to be much more effective for the stabilization of the arc attachment than the high intensities of the much more focused laser beam used in a previous study, which were causing an increase in arc voltage. 23,24 These results may be regarded as additional proof of our argumentation that the arc stabilization is not caused by the laser-induced evaporation of base material. Instead, it is concluded that the molten surface region within the beam spot region does already offer preferred conditions for arc rooting.…”

Section: Resultssupporting

confidence: 62%

“…[22][23][24] Initially, both heat sources were arranged in a separate order but inclined to each other in such a way that a common operation point of the arc root and the laser spot resulted. The most distinguishing feature of this set-up was the use of a highly focused single-mode fiber laser beam with a focus diameter of only 40 lm and a resultant intensity of 8 Â 10 6 W cm À2 in the case of 100 W applied laser power.…”

Section: Introductionmentioning

confidence: 99%

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Laser-assisted plasma arc welding of stainless steel

Mahrle

Rose

Schnick

et al. 2013

Journal of Laser Applications

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A plasma arc and a low-power/high beam quality laser beam were coaxially combined into one process in order to obtain a more efficient and stable arc for thin sheet welding applications. Theoretical discussion of interaction mechanisms between the laser beam and the plasma arc and results of bead-on-plate welding trials carried out on AISI 304 stainless steel will be presented. Measurements were made of electrical and geometrical arc properties with and without assistance from the laser beam. Additionally, the impact of the laser beam on the weld seam geometry was evaluated. The results showed that the use of the additional low-power laser beam is capable of producing significant process improvements in comparison to the individual plasma arc process alone with respect to arc stability and welding performance

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Section: Resultssupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Laser-assisted plasma arc welding of stainless steel

Mahrle

Rose

Schnick

et al. 2013

Journal of Laser Applications

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show abstract

“…Because of the serious segregation of the materials at these two preparation temperatures, the crack propagation is hindered less, the expansion is faster, which leads to more serious wear and larger debris shedding. When the crack extends to a certain length, the material between the crack and the surface will peel off in the form of flake wear debris [30][31][32][33][34][35][36][37], so the wear mechanism at this time is peeling wear.…”

Section: Friction and Wear Properties Of In-situ Formed Aluminum Matrmentioning

confidence: 99%

Microstructure and tribological properties of in-situ formed Al₃Zr/A356 composite

Pinyi

et al. 2020

Mater. Res. Express

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A1 3 Zr/A356 Composite was prepared by in-situ reaction of K 2 ZrF 6 powder and cast aluminum A356 melt at different temperatures (710°C, 750°C, 770°C, 790°C). The effect of different melting temperature on the morphology of Al 3 Zr particles was studied, and the sliding friction and wear properties of the composites were studied by wear test. It can be seen from the x-ray diffractometer (XRD) that the prepared composite material consists of A1 3 Zr and ɑ-Al, and also has a small part of the aluminum-silicon eutectic phase; SEM analysis shows that the particles of in-situ reinforced phase are fine, With the increase of temperature, the morphology of A1 3 Zr reinforced phase changed from block to needle and strip, and the particle distribution of the reinforced phase was uniform and well dispersed in the matrix at 750°C. TEM experiments show that the reinforced phase exists at 750°C and has a good combination with the matrix, which plays a very good role in particle reinforcement Friction and wear experiments show that the different preparation temperature results in different phase morphology. The reinforced phase particles existing on the surface of composites at 710°C and 750°C bear most of the friction, so the friction coefficient of the composites is larger at these preparation temperature, and the main wear modes are oxidation wear and abrasive wear. The friction coefficient of the composites prepared at 770°C and 790°C is small, and the wear modes are mainly delamination wear and oxidation wear. When the preparation temperature is 750°C, the wear resistance of the composites is the best.

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“…Here, the laser-induced plasma results in the formation of a so-called keyhole, which allows an improved stirring of the molten material as well as a significant increase in welding depth and thus a larger and more homogenous welding seam [4,5]. In this context, laser irradiation can also be added to plasma arc welding processes in order to improve the process performances [6,7]. The plasmas used for this purpose are usually high-energetic arc discharges, driven at several amperes, where the metallic work piece itself acts as counter electrode.…”

Section: Introductionmentioning

confidence: 99%

Plasma-Enhanced Laser Materials Processing

Gerhard¹,

Viöl²,

Wieneke³

2016

Plasma Science and Technology - Progress in Physical States and Chemical Reactions

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In the last few years, the combination of laser irradiation with atmospheric pressure plasmas, also referred to as laser plasma hybrid technology, turned out to be a powerful technique for different materials processing tasks. This chapter gives an overview on this novel approach. Two methods, simultaneous and sequential laser-plasma processing, are covered. In the first case, both the plasma and the laser irradiation are applied to the substrate at the same time. Depending on the process gas and the discharge type, the plasma provides a number of species that can contribute to the laser process plasmaphysically or plasma-chemically. Sequential plasma-enhanced laser processing is based on a plasma-induced modification of essential material properties, thus improving the coupling of laser energy into the material during subsequent laser ablation. Simultaneous plasma-assisted laser processing allows increasing the efficiency of a number of different laser applications such as cleaning, microstructuring, or annealing processes. Sequential plasma-assisted laser processing is a powerful method for the processing of transparent media due to a reduction in the laser ablation threshold and an increase in the ablation rate at the same time. In this chapter, the possibilities, underlying mechanisms, performance, and limits of the introduced approaches are presented in detail.

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Process characteristics of fibre-laser-assisted plasma arc welding

Cited by 45 publications

References 15 publications

Laser-assisted plasma arc welding of stainless steel

Laser-assisted plasma arc welding of stainless steel

Microstructure and tribological properties of in-situ formed Al₃Zr/A356 composite

Plasma-Enhanced Laser Materials Processing

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Process characteristics of fibre-laser-assisted plasma arc welding

Cited by 45 publications

References 15 publications

Laser-assisted plasma arc welding of stainless steel

Laser-assisted plasma arc welding of stainless steel

Microstructure and tribological properties of in-situ formed Al3Zr/A356 composite

Plasma-Enhanced Laser Materials Processing

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Product

Resources

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Microstructure and tribological properties of in-situ formed Al₃Zr/A356 composite