Influence of laser texturing strategy on thermomechanical joining of AA7075 aluminum alloy and PEEK

Lambiase, F.; Yanala, Phanidra Babu; Leone, Claudio; Paoletti, A.

doi:10.1016/j.compstruct.2023.116974

Cited by 19 publications

(2 citation statements)

References 26 publications

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“…The SLS strengths of specimens with reduced dimensions as tested in this work and specimens with dimensions according to DIN EN 1465 [32] present a similar trend: Pretreated specimens with a high surface roughness, i.e., also a high micro-surface enlargement, present the highest resulting SLS strengths before and after aging [18,22,23,45,46]. Lambiase et al also stated that a higher number of laser scans resulted in an increased mechanical interlocking and therefore mechanical strength of AA7075 -PEEK adhesive joints [47]. Since scan repetitions also results in deeper surface structures, the increased crater depths observed in this work are in line with these findings.…”

Section: Results In Context With Previous Studies Of Laser-pretreated...supporting

confidence: 67%

Relationship between laser-generated micro- and nanostructures and the long-term stability of bonded epoxy-aluminum joints

Freund

Löbbecke

Delp

et al. 2023

The Journal of Adhesion

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To improve the mechanical performance and to address current shortcomings of adhesive bonds such as bond degradation due to aging, a pulsed laser surface pretreatment of the metal surfaces of aluminum AW 6082-T6 joints with epoxy adhesive E320 is investigated. The surface treatment of the specimens resulted in increased single-lap shear (SLS) strengths before and after hydrothermal aging in 80 °C hot water compared to non-pretreated reference specimens. In order to reveal the correlations of laser parameters, resulting surface morphologies and the SLS strength, differently laser pretreated surfaces were characterized at the micro-and nanoscale using optical and scanning electron microscopies. The surface enlargement was quantified with a digital image analysis of cross-sections prepared from the joint interfaces. An analysis of variances (ANOVA) of the SLS results indicated that the laser parameters power and pulse frequency were most critical for obtaining high SLS strengths. Pretreated joint surfaces with a high micro-and nano-surface enlargement and deep solidification structures provide high SLS strengths of up to 50 MPa and almost negligible aging losses of merely 4%. Undercut structures on the pretreated surfaces were found to be beneficial for the mechanical and aging properties when only limited micro-and nanostructuring was applied.

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Section: Results In Context With Previous Studies Of Laser-pretreated...supporting

confidence: 67%

Relationship between laser-generated micro- and nanostructures and the long-term stability of bonded epoxy-aluminum joints

Freund

Löbbecke

Delp

et al. 2023

The Journal of Adhesion

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“…Laser texturing has attracted much attention by creating diverse micro-and nanostructures with many advantages [7]. F. Lambiase et al treated aluminum surfaces before joining to enhance the mechanical interlock between substrates by laser texturing [8]. Wan et al demonstrated that laser treatment induces physicochemical changes, increasing joint strength by 374% and transitioning the failure mode from interfacial to mixed [9].…”

Section: Introductionmentioning

confidence: 99%

Adhesion Strength and Anti-Corrosion Performance of Ceramic Coating on Laser-Textured Aluminum Alloy

Fan,

Wang,

Yin

et al. 2023

Coatings

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Laser surface texturing and micro-arc oxidation provide excellent approaches to enhance the adhesion strength and anti-corrosion performance of adhesive bonding interfaces in aluminum alloys, which can be applied in the field of automotive light weighting. Herein, micro-arc oxidation coatings were fabricated on the laser-textured aluminum surface under the voltage of 500 V for various treatment times (5 min, 15 min, 30 min, 60 min). The anti-corrosion performance of ceramic coatings on the laser-textured surface was analyzed using electrochemical measurements. The results of electrochemical measurement indicate that the coating on the sample surface presents two time constants corresponding to a dual-layer structure. The sample grown under 500 V for 60 min exhibits excellent protective performance with a value of 1.3 × 107 ohm·cm2. The adhesion strength of laser-textured ceramic coating is improved compared with the as-received substrate. The sample treated with 500 V for 30 min exhibits the highest bonding strength with a value of 52 MPa. The wider pores and bulges for the sample grown in 60 min would introduce microcracks and consequently reduce the adhesion strength.

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Investigation of Laser Surface Texturing and Injection Molding Parameters in Advanced High‐Strength Steel‐Polyamide Direct Joining

Kim,

Jeong

et al. 2024

steel research int.

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This study investigates the joining of dissimilar materials, specifically galvannealed advanced high‐strength steel (AHSS) and glass fiber‐reinforced polyamide 6 (PA 6) to achieve lightweight automotive. AHSS and PA 6 are widely used in the automobile industry; however, a direct joining of those two materials is difficult owing to their great difference in physical properties. Therefore, laser surface texturing (LST) and plastic injection molding are adopted to join AHSS and PA 6, which can create a strong mechanical interlock between AHSS and PA 6, resulting in an excellent joint strength compared to other joining techniques. The effects of LST parameters (groove depth and hatch distance) and injection molding temperatures on the joint strength are examined. The maximum AHSS‐PA 6 joint strength is measured at 72.3 MPa. Additionally, the microstructure and mechanical properties of recast, which develops over the original metal surface by melting and resolidifying, are analyzed. Compared to the base metal, the recasts exhibit higher hardness due to smaller grain sizes. PA 6 fills the laser‐textured grooves and spaces between the recasts, acting as a mechanical interlock that enhances joint strength under tensile shear testing.

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Influence of laser texturing strategy on thermomechanical joining of AA7075 aluminum alloy and PEEK

Cited by 19 publications

References 26 publications

Relationship between laser-generated micro- and nanostructures and the long-term stability of bonded epoxy-aluminum joints

Relationship between laser-generated micro- and nanostructures and the long-term stability of bonded epoxy-aluminum joints

Adhesion Strength and Anti-Corrosion Performance of Ceramic Coating on Laser-Textured Aluminum Alloy

Investigation of Laser Surface Texturing and Injection Molding Parameters in Advanced High‐Strength Steel‐Polyamide Direct Joining

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