New methodology for ultra-short laser welding of transparent substrates without mechanical clamping tool: microfluidics applications

Henrottin, Anne; Décultot, M.; Champion, Audrey; Patars, Jérôme; Ramos-de-Campos, José A.

doi:10.1117/12.2507793

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…Microcomposite and nanocomposite structures prepared by picosecond lasers on metal surfaces have a higher surface area than trench structures etched by nanosecond lasers. Femtosecond lasers have ultra‐narrow pulse widths and ultra‐high energy densities, with very small heat‐affected zones that do not produce defects such as porosity and cracks 48 . Only femtosecond lasers can burst resins without compromising the hybrid joint region.…”

Section: Enhancement For Laser‐welded Joints Between Cfrpt and Metalmentioning

confidence: 99%

Laser joining of CFRTP to metal: A review on welding parameters, joint enhancement, and numerical simulation

Hu,

2023

Polymer Composites

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As a lightweight material with high performance, carbon fiber‐reinforced thermoplastic plastic (CFRTP) is being implemented increasingly in aerospace, automotive, new energy, and so forth. The connection between CFRTP and metals, which are still used in these areas, is an inevitable problem. Among the various connection techniques, laser welding of CFRTP to metal is attractive due to high efficiency, excellent strength, and no contact. This paper presents the most recent research on laser welding CFRTP and metals in three aspects: (a) the principle of laser welding CFRTP to metals and the influence of process parameters on joint quality including laser power, defocus distances, scanning speed, clamping pressure, and beam shape, (b) the joint enhancement mechanisms and methods, and (c) numerical simulations of temperature and stress fields of laser‐connected CFRTP to metals. The findings show that joint strength is significantly influenced by process parameters and that the maximum joint strength can be achieved by choosing the right parameters. Apart from the conventional techniques of texturing the metal surface, applying a suitable layer of resin, and applying chemical treatment, other novel joint improvement measures have also been used, including the use of blue laser and CFRTP embedded in the metal. The temperature field and residual stresses can be successfully simulated by finite elements, which can be useful when studying new processes and choosing parameters for metal laser welding and CFRTP.Highlights We review the progress from parameters, simulations, and enhancements. The main parameters have essential effects on the dimensions and strength of joints. FEM (Finite Element Method) is applied to simulate the temperature and stress of the laser welding. Joints can be reinforced by surface pre‐texturing, adding resin, and grafting.

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Section: Enhancement For Laser‐welded Joints Between Cfrpt and Metalmentioning

confidence: 99%

Laser joining of CFRTP to metal: A review on welding parameters, joint enhancement, and numerical simulation

Hu,

2023

Polymer Composites

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“…Jiao et al [180] prepared a network micro-texture with various spacings on the surface of A7075 aluminum alloy, and demonstrated that when the spacing between the microstructures was within a reasonable range, the combination of interface morphology and quality was at its best. In addition, when different laser scanning strategies were used on the metal surface, different microstructure morphologies were obtained, such as conical [181], grid slot [179], rhombus [182], or porous [183]. However, in the laserstructured metal surface, metal melt inevitably experienced rapid cooling or multiple heating and melting processes, causing metal surface heat defects such as cracks, holes, and edging, and the area's microstructure and mechanical properties were reduced, affecting the hybrid joint connection strength and the forming quality [182,184].…”

Section: Microstructure Treatment Of Metal Surfacementioning

confidence: 99%

“…In addition, when different laser scanning strategies were used on the metal surface, different microstructure morphologies were obtained, such as conical [181], grid slot [179], rhombus [182], or porous [183]. However, in the laserstructured metal surface, metal melt inevitably experienced rapid cooling or multiple heating and melting processes, causing metal surface heat defects such as cracks, holes, and edging, and the area's microstructure and mechanical properties were reduced, affecting the hybrid joint connection strength and the forming quality [182,184]. Therefore, in the process of micro-structuring the metal surface, in addition to considering the basic characteristics of the surface microstructure parameters, the structural process parameters need to be correctly regulated to improve the overall forming quality.…”

Section: Microstructure Treatment Of Metal Surfacementioning

confidence: 99%

Research Progress on Characterization and Regulation of Forming Quality in Laser Joining of Metal and Polymer, and Development Trends of Lightweight Automotive Applications

Zhou

Gao

Zhang

2022

Metals

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Metal–polymer hybrid structures have been widely used in research into their lightweight automotive applications, because of their excellent comprehensive properties. As an efficient technology for automatic connection of dissimilar materials, laser joining has great application potential and development value in the field of lightweight automotive design. However, due to the physical and chemical differences between metals and polymers, the formation quality of the hybrid joint is seriously affected by defects, low bonding strength, and poor morphology. Meanwhile, it is difficult to meet the demands for lightweight automobiles by considering only bonding strength as the target for forming quality. Therefore, the technological characteristics of metal–polymer hybrid structures for use in lightweight automotive applications are analyzed, the advantages and problems of laser-joining technology are discussed, and the characterization indexes and regulation measures of forming quality in laser joining are summarized. This paper which provides reference and guidance for reliable forming, intelligent development, and lightweight application of laser joining for polymer–metal hybrid structures.

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New methodology for ultra-short laser welding of transparent substrates without mechanical clamping tool: microfluidics applications

Cited by 2 publications

References 4 publications

Laser joining of CFRTP to metal: A review on welding parameters, joint enhancement, and numerical simulation

Laser joining of CFRTP to metal: A review on welding parameters, joint enhancement, and numerical simulation

Research Progress on Characterization and Regulation of Forming Quality in Laser Joining of Metal and Polymer, and Development Trends of Lightweight Automotive Applications

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