Enhancement of adhesive joint strength by laser surface modification

Baburaj, E.G.; Starikov, D.; Evans, Jrg; Shafeev, G. A.; Bensaoula, A.

doi:10.1016/j.ijadhadh.2006.05.004

Cited by 140 publications

(52 citation statements)

References 16 publications

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“…It has been observed in previous related work that all these effects combined may also lead to the formation of a composite interfacial region (i.e. adhesive interlocked within substrates asperities) able to enhance joint strength [10].…”

Section: Mechanical Testsmentioning

confidence: 93%

“…On top of this, PLA improves bond repeatability, as well as waste and cost reduction, and is also prone to automation. Previous literature works have indicated that PLA promotes significant modifications of surface morphology [8,9] and chemistry [10,11], leading to improvement in surface wetting [12,13] and mechanical interlocking [12,14], with consequent increases in bond toughness [15,16] and long term joint stability [18]. It may also outperform traditional joining techniques, such as riveting and fusion welding when dealing with dissimilar materials [19].…”

Section: Introductionmentioning

confidence: 99%

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Improving adhesion of copper/epoxy joints by pulsed laser ablation

Hernandez

Alfano

Lubineau

et al. 2016

International Journal of Adhesion and Adhesives

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The purpose of the present work is to survey the effect of pulsed laser ablation on copper substrates (CuZn40) deployed for adhesive bonding. Surface pre-treatment was carried using an Yb-fiber laser beam. Treated surfaces were probed using Scanning Electron Microscopy (SEM) and X-Ray Photoelectron Spectroscopy (XPS). The mechanical performance of CuZn40/epoxy bonded joints was assessed using the T-peel test coupon.In order to resolve the mechanisms of failure and adhesive penetration within surface asperities induced by the laser treatment, fracture surfaces were surveyed using SEM.Finite element simulations, based on the use of the cohesive zone model of fracture, were carried out to evaluate the variation of bond toughness. Results indicated that the laser ablation process effectively modifies surface morphology and chemistry and enables enhanced mechanical interlocking and cohesive failure within the adhesive layer.Remarkable improvements of apparent peel energy and bond toughness were observed with respect to control samples with sanded substrates.

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Section: Mechanical Testsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Improving adhesion of copper/epoxy joints by pulsed laser ablation

Hernandez

Alfano

Lubineau

et al. 2016

International Journal of Adhesion and Adhesives

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“…Different surface pattern and roughness are easily obtained by the mechanical abrasion process. Many researchers (Baburaj et al, 2007;Azari e al.,2010;Hunter et al, 2012;De Barros et al, 2015) focused on the effect of surface roughness on the bonded joint strength under different loading condition. Tezcan et al (2003) studied the effect of surface roughness on the adhesive bond strength under static and dynamic loading condition using a cylindrical specimen of steel adherend and Loctite 638 adhesive.…”

Section: Introductionmentioning

confidence: 99%

Influence of Adherend Surface Roughness on the Adhesive Bond Strength

Ghumatkar

Budhe

Sekhar

et al. 2016

Lat. Am. j. solids struct.

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Surface treatment of the adherends prior to adhesive bonding plays an important role in the enhancing of strength and durability of bonded joints. In this work, an investigation on effect of adherend surface roughness on adhesive bond strength was performed. Single strap joints with different adherends (mild steel and aluminium) bonded with an epoxy resin (Araldite® 2015) were tested. The adherend surface was treated by mechanical abrasion process using an emery paper. Contact angle measurement and SEM analysis to understand the wettability and the failure mechanism of the joints were performed. It was found that an optimum surface roughness exists for a maximum bonding strength and the roughness range depends on the adherend material. The joint strength changes are associated not only simply by the increased bonding area, surface texture or mechanical interlocking, but also by the chemical characteristics of the surface and the chemical bond between them.

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“…Alternative physical techniques like laser or plasma pretreatment are developed, incentivated by major drawbacks such as environmental issues and unique bath setups for different metals and alloys [14,17]. Laser irradiation was proven to modify a titanium surface on a nano-range, resulting in an improved joint strength due to an increased surface area [17][18][19][20][21][22][23]. Chemical activation and contamination removal by the energy input into the substrate material were studied in [24].…”

Section: Interfacial Phenomena In Metallic Z-reinforced Cfrp Joints Amentioning

confidence: 99%