Laser Beam Welding with High-Frequency Beam Oscillation: Welding of Dissimilar Materials with Brilliant Fiber Lasers

Kraetzsch, Mathias; Standfuß, Jens; Klotzbach, Annett; Kaspar, Jörg; Brenner, Berndt; Beyer, Eckhard

doi:10.1016/j.phpro.2011.03.018

Cited by 93 publications

(25 citation statements)

References 1 publication

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“…LBW is one of the most efficient joining techniques, due to its flexibility, precision and capability to produce restricted HAZ and deep penetration (Casalino et al, 2014). In particular, pulsed lasers generate a high quality beam, with a low divergence and with a wavelength suitable for the absorption by a wide range of materials (Vänskä and Salminen, 2012;Kraetzsch et al, 2011). LBW processing parameters and physical properties such as laser power, beam diameter, welding speed, focal point position, beam reflectivity, thermal diffusivity, surface tension, edge surface roughness, atmosphere pressure, shielding gas type and shielding gas flow rate (Katayama et al, 2010;Salminen et al, 2010) have a strong effect on the process and weld penetration.…”

Section: Introductionmentioning

confidence: 99%

Weld speed effects on quality of Ti/Al dissimilar metal joints using laser beam welding

Kalaiselvan¹,

Elango

Nagarajan

2017

IJASMM

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Laser beam welding produces good quality welds with minimum shrinkage for sheet metal joints. The quality of welded joint depends upon surface morphology, hardness, mixing of liquid phases and metallurgical non-homogeneity induced by gradients of temperatures and cooling rate at the weld interface. In the present investigation, Titanium Grade5 (Ti) and AA2024 (Al) alloy dissimilar sheet metals are joined using Nd:YAG pulsed laser beam and the effect of welding speed on crack tendencies, the strength of weldment based on hardness and composition changes are studied. Test results reveal that higher welding speed eliminates cracks in weldment and improves surface morphology. From hardness test, it is observed that the strength of fusion zone is considerably improved at higher weld speed and the findings are supported by SEM and EDS studies.Keywords: laser beam welding; LBW; morphology; hardness; microstructure; composition.Reference to this paper should be made as follows: Kalaiselvan, K., Elango, A. and Nagarajan, N.M. (2017) N.M. Nagarajan is a retired Professor from National Institute of Technology, Calicut, Kerala, India. His current research deals with powder metallurgy, metal joining, foundry and control of welding processes. He has authored and co-authored more than 100 technical papers.

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Section: Introductionmentioning

confidence: 99%

Weld speed effects on quality of Ti/Al dissimilar metal joints using laser beam welding

Kalaiselvan¹,

Elango

Nagarajan

2017

IJASMM

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“…The cells are stacked using metal or plastic support structures to leave space for state-of-charge dependent swelling. The structure is typically consolidated by gluing cells together and/or enclosing the cells in a metal frame [23]. EV battery design guidelines are at times controversial [12].…”

Section: Ev Battery Design Principlesmentioning

confidence: 99%

Overview of Optical Digital Measuring Challenges and Technologies in Laser Welded Components in EV Battery Module Design and Manufacturing

et al. 2020

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Ensuring the precision and repeatability of component assembly in the production of electric vehicle (EV) battery modules requires fast and accurate measuring methods. The durability of EV battery packs depends on the quality of welded connections, therefore exact positioning of the module components is critical for ensuring safety in exploitation. Laser welding is a non-contact process capable of welding dissimilar materials with high precision, for that reason it has become the preferred joining method in battery production. In high volume manufacturing, one of the main production challenges is reducing the time required for assessment of dimensional and geometrical accuracy prior to joining. This paper reviews the challenges of EV battery design and manufacturing and discusses commercially available scanner-based measurement systems suitable for fabrication of battery pack components. Versatility of novel metrological systems creates new opportunities for increasing the production speed, quality and safety of EV battery modules.

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“…In this work presented here, we investigate the irradiation pattern given by the spatial modulation, the seam dimensions and the temperature distributions for laser welding with this technique. To simplify the investigations, we make bead on plate welds and use a circular oscillatory movement, in contrast to linear oscillations [10,11] or more complex Lissajous-type oscillations [12]. The welding experiments were made for contour welding with and without a superposed oscillatory movement of the laser beam.…”

Section: Introductionmentioning

confidence: 99%

Seam Formation in Laser Beam Micro-Welding with Spatial Power Modulation

Aden

Heinen

Olowinsky

2021

Lasers Manuf. Mater. Process.

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When laser sources of high brilliance are used for the micro-welding of metals, small seam dimensions are generated. If the spatial power is modulated by a superposition of the linear feed rate and a circular-oscillatory movement of high frequency, the width of the seam is controlled by the amplitude of the circular movement. In this study, the irradiation pattern of the seam was calculated and reveals that some spots of the seam area are not irradiated, while other have been irradiated several times. The seam shapes were visualized with micro cross-sections for different laser powers, linear feed rates and oscillatory amplitudes. Thermal simulations were made to discuss the different seam shapes. A consequence of the oscillatory movement is the appearance of different solidification fronts, which are visible in the micro cross-sections.

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Laser Beam Welding with High-Frequency Beam Oscillation: Welding of Dissimilar Materials with Brilliant Fiber Lasers

Cited by 93 publications

References 1 publication

Weld speed effects on quality of Ti/Al dissimilar metal joints using laser beam welding

Weld speed effects on quality of Ti/Al dissimilar metal joints using laser beam welding

Overview of Optical Digital Measuring Challenges and Technologies in Laser Welded Components in EV Battery Module Design and Manufacturing

Seam Formation in Laser Beam Micro-Welding with Spatial Power Modulation

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