Laser welding of dissimilar metallic materials with use of diffractive optical elements

Murzin, Serguei P.; Liedl, Gerhard

doi:10.18287/2412-6179-2017-41-6-848-855

Cited by 22 publications

(2 citation statements)

References 24 publications

(4 reference statements)

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“…The assessment of strength properties of joints proved this statement. In [25], it was determined that laser exposure with its well-defined and accurately localized energy input offers the possibility to reduce the growth of intermetallic layers in the butt joint. The necessity of using special optics for a more precise dosage and the ability to perform a special redistribution of the laser beam energy locally in the laser treatment area was determined.…”

Section: Introductionmentioning

confidence: 99%

Improving the Quality of Laser-Welded Butt Joints of Metal–Polymer Sandwich Composites

et al. 2022

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Sandwich panels are promising composite materials, although the possibilities for their thermal joining are limited due to the degradation of the polymer core at elevated temperatures. The purpose of this study is to improve the quality of the butt joints in metal–polymer sandwich composites performed by laser welding. A pulsed Nd:YAG Rofin StarWeld Performance laser was used to perform the two-sided welding of the metal–polymer three-layer composite material. On each of the two sides of the material, a welded joint was made with partial penetration of the covering steel sheets, which was considered a prerequisite for preventing the degradation of the core polymer layer. The energy density of the laser irradiation was redistributed by increasing the diameter of the laser spot. The structure of the welded joints was examined using a polarized optical microscope and a scanning electron microscope. It was determined that the laser treatment resulted in a partial penetration weld on each of the two covering metal sheets of the material, reaching a depth of more than 50% of the sheet’s thickness without damaging the polymer. The welding area consisted of two zones, one being the weld metal and the other the heat-affected zone. As a result of relatively rapid heating and cooling cycles, fine-dispersed structures were formed in the heat-affected and remelted zones. The performed tensile tests showed that the strength of the welded area was about 80% of that of the base material.

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Section: Introductionmentioning

confidence: 99%

Improving the Quality of Laser-Welded Butt Joints of Metal–Polymer Sandwich Composites

et al. 2022

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“…The results show that dual-beam laser welding with side-by-side configuration produces soundly welded steel/Al lapped joints free of welding defects. Murzin et al [29] studied the pulsed laser welding of aluminum alloy AK4 and titanium alloy VT5-1, and obtained a uniform structure without voids, which indicates that the welded joint has high enough performance. Wallerstein et al [30] reviewed the latest progress of laser welding between aluminum alloy and steel, and pointed out that connecting aluminum and steel is a challenging task, mainly because of the formation of brittle intermetallic compounds at the joint interface.…”

Section: Introductionmentioning

confidence: 99%

Innovations in Monitoring, Control and Design of Laser and Laser-Arc Hybrid Welding Processes

Cheng

Ning

et al. 2021

Metals

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With the rapid development of high power laser, laser welding has been widely used in many fields including manufacturing, metallurgy, automobile, biomedicine, electronics, aerospace etc. Because of its outstanding advantages, such as high energy density, small weld size, easy automation. Combining the two heat sources of laser and arc for welding can achieve excellent results due to the synergistic effect. Laser welding is a complicated physical and chemical metallurgical process, involving the laser beam and molten pool, keyholes and materials melting, evaporation and multiple physical process. Process monitoring and quality control are important content of research and development in the field of laser welding, which is the premise to obtain fine weld with high quality. Numerical simulation technology can describe many complex physical phenomena in welding process, which is very important to predict weld forming and quality and clarify the underline mechanism. In this paper, the research progress of process monitoring, quality control and autonomous intelligent design of laser and laser-arc hybrid welding based on numerical simulation were reviewed, and the research hotspots and development trends of laser welding in the future are predicted.

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Nanostructures in Welded Joints and Their Interconnection with Operation Properties

Markashova¹,

Berdnikova²,

Alekseienko³

et al. 2019

Lecture Notes in Mechanical Engineering

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Laser welding of dissimilar metallic materials with use of diffractive optical elements

Cited by 22 publications

References 24 publications

Improving the Quality of Laser-Welded Butt Joints of Metal–Polymer Sandwich Composites

Improving the Quality of Laser-Welded Butt Joints of Metal–Polymer Sandwich Composites

Innovations in Monitoring, Control and Design of Laser and Laser-Arc Hybrid Welding Processes

Nanostructures in Welded Joints and Their Interconnection with Operation Properties

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