Aluminum pretreatment by a laser ablation process: influence of processing parameters on the joint strength of laser welded aluminum – polyamide assemblies

Al-Sayyad, Adham; Bardon, Julien; Hirchenhahn, Pierre; Santos, Kevin; Houssiau, Laurent; Plapper, Peter

doi:10.1016/j.procir.2018.08.136

Cited by 23 publications

(20 citation statements)

References 7 publications

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“…Moreover, the correlation between topography and shear load explains why, a posteriori, no correlation was found between the Ra topography value (which is strongly correlated to Rq value) and shear load in our former article [5]. In such a case, the critical characteristic of the surface topography is its morphology of peaks, evaluated by Rq/Rdq ratio, and not its amplitude, which is evaluated by Ra or Rq.…”

mentioning

confidence: 63%

“…Al surfaces were ablated, using a short-pulsed (ns) Nd:YVO4 laser (TruMark 6130 from TRUMPF, Ditzingen, Germany), with a wavelength of 1064 nm and spot size of 45 µm. Al-Sayyad et al [5] already demonstrated that, from seven different ablation parameters, namely pulse frequency (f p ), beam guidance speed (V), lines, focal position, Al rolling direction, ablation hatching orientation, and laser beam power percentage, only f p and V had a significant influence on laser welded Al-PA joints' resistance to shear failure. This research focuses on further evaluating the effects of those significant laser-ablation conditions, as shown in Table 1, on Al surface properties, thermal transfer across the joining partners, and corresponding joint quality.…”

Section: Laser Ablationmentioning

confidence: 99%

“…This research focuses on further evaluating the effects of those significant laser-ablation conditions, as shown in Table 1, on Al surface properties, thermal transfer across the joining partners, and corresponding joint quality. Based on previous investigations [5], six ablation conditions (see Table 1) were chosen for this research, as they resulted in a wide range of joint quality. Since ablation was performed with a q-switched laser, increasing pulse frequency results in decreasing the peak pulse power and fluence of the laser beam.…”

Section: Laser Ablationmentioning

confidence: 99%

“…Preliminary surface treatments before welding have shown a significant impact on the joint strength and quality. Researchers [3][4][5][6][7][8][9][10][11][12] reported the effects of several surface pretreatments on LAMP, including mechanical, chemical, electrochemical, and laser pretreatments for metals, as well as plasma and UV ozone pretreatment for polymers. Similar to adhesive bonding, two main factors were reported in the literature as affecting the LAMP joint properties: mechanical interlocking and physicochemical bonding.…”

Section: Introductionmentioning

confidence: 99%

“…Laser ablation was proven to be an effective and rapid surface pretreatment technique for aluminum (Al 1050) to enhance the bonding strength when welded with polyamide (PA 6.6) [1,5,25]. It was already demonstrated that laser-ablation parameters have a strong impact on the joint quality, demonstrated by the joint area and its resistance to failure, but no effect on the joint strength, i.e., its stress to failure [5]. Results have shown the prominence of cohesive failure mode indicating that interfacial adhesion is not the only factor influencing the joint quality.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Aluminum Laser Ablation on Interfacial Thermal Transfer and Joint Quality of Laser Welded Aluminum–Polyamide Assemblies

et al. 2019

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Laser assisted metal–polymer joining (LAMP) is a novel assembly process for the development of hybrid lightweight products with customized properties. It was already demonstrated that laser ablation of aluminum alloy Al1050 (Al) prior to joining with polyamide 6.6 (PA) has significant influence on the joint quality, manifested in the joint area. However, profound understanding of the factors affecting the joint quality was missing. This work investigates the effects of laser ablation on the surface properties of Al, discusses their corresponding impact on the interfacial thermal transfer between the joining partners, and evaluates their effects on the joint quality. Samples ablated with different parameters, resulting in a range from low- to high-quality joints, were selected, and their surface properties were analyzed by using 2D profilometry, X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), and energy-dispersive X-ray spectroscopy (EDX). In order to analyze the effects of laser ablation parameters on the interfacial thermal transfer between metal and polymer, a model two-layered system was analyzed, using laser flash analysis (LFA), and the thermal contact resistance (TCR) was quantified. Results indicate a strong influence of laser-ablation parameters on the surface structural and morphological properties, influencing the thermal transfer during the laser welding process, thus affecting the joint quality and its resistance to shear load.

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mentioning

confidence: 63%

Section: Laser Ablationmentioning

confidence: 99%

Section: Laser Ablationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Aluminum Laser Ablation on Interfacial Thermal Transfer and Joint Quality of Laser Welded Aluminum–Polyamide Assemblies

et al. 2019

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Integrated Structures from Dissimilar Materials: The Future Belongs to Aluminum–Polymer Joints

Temesi

Czigány

2020

Adv Eng Mater

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The spread of integrated structural elements and parts made from low‐density materials (for example aluminum and polymers) created a need for joining technologies with which these can be joined. Herein, the most important surface preparation methods and joining processes, with which the surface structure of aluminum can be modified and aluminum and polymer structures can be joined, are reviewed. For both topics, a new classification method is introduced: surface preparation methods are grouped based on the method of creating surface structures, whereas joining technologies are grouped according to heat input and structural changes in the polymer material. Herein, “hot” joining technologies (in which so much heat is formed that the polymer material is melted) are reviewed. This grouping category includes techniques based on friction and induction, ultrasonic and laser welding, and some in situ joining technologies. With these, materials with highly different chemical structures and melting temperatures are joined in fast cycles, in a reliable manner. In the coming years, more integrated structures containing aluminum–polymer joints manufactured with fast, automatable joining techniques (such as ultrasonic and laser welding, in compliance with the requirements of Industry 4.0) will be used throughout the industry.

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Patterned Electroconductive Networks in Ag‐Polyamide 6 Composites by Laser Ablation

Oliveira

Dencheva

Denchev

et al. 2021

Macro Materials & Eng

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A simple, fast, and cost‐effective method to fabricate conductive paths on insulating Ag‐containing polyamide 6 (PA6) composites by laser beam treatment is presented in this study. First, Ag‐hybrid microparticles (Ag‐MP) with a total metal load of up to 19 wt% are synthesized based on a reactive encapsulation strategy utilizing activated anionic polymerization of ε‐caprolactam in solution, in the presence of Ag nanoparticles. Then, the Ag‐MP are compression molded into plates (Ag‐PL) on which a scanning laser treatment is applied to create conductive paths in their selected parts. A comparison between structural, morphological, and thermal properties of the Ag‐MP and the molded Ag‐PL composites is performed. The electric conductive properties of the Ag‐loaded hybrid materials are investigated before and after laser ablation, and it is concluded that the laser treatment results in selected paths with widths in the range of 500 µm with conductivity values in the range of 1.12 to 8.90 S m−1 while the untreated Ag‐PA6 surface remains isolating with conductivity values of 1.27 × 10−08 S m−1. These results prove that applying laser ablation with controlled parameters on initially insulating Ag‐PL composites can efficiently produce conductive line patterns in composite plates.

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Aluminum pretreatment by a laser ablation process: influence of processing parameters on the joint strength of laser welded aluminum – polyamide assemblies

Cited by 23 publications

References 7 publications

Influence of Aluminum Laser Ablation on Interfacial Thermal Transfer and Joint Quality of Laser Welded Aluminum–Polyamide Assemblies

Influence of Aluminum Laser Ablation on Interfacial Thermal Transfer and Joint Quality of Laser Welded Aluminum–Polyamide Assemblies

Integrated Structures from Dissimilar Materials: The Future Belongs to Aluminum–Polymer Joints

Patterned Electroconductive Networks in Ag‐Polyamide 6 Composites by Laser Ablation

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