Surface analytical characterisation of Nd:YAG-laser pre-treated Al Mg3 as a preparation for bonding

Langer, Manuel; Rechner, Rico; Thieme, Michael; Jansen, Irene; Beyer, Eckhard

doi:10.1016/j.solidstatesciences.2012.04.029

Cited by 22 publications

(11 citation statements)

References 22 publications

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“…Earlier works have also shown that laser pre-treatments can exert a beneficial action on the strength of adhesive joints [12,13,14,15,16]. Indeed, pulsed laser irradiation can melt the target material, removing contaminants and producing favorable changes in surface chemistry and morphology [17,18].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of static strength and long term durability of steel/epoxy joints through a fiber laser surface pre-treatment

Rotella

Alfano

Schiefer

et al. 2015

International Journal of Adhesion and Adhesives

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Section: Introductionmentioning

confidence: 99%

Enhancement of static strength and long term durability of steel/epoxy joints through a fiber laser surface pre-treatment

Rotella

Alfano

Schiefer

et al. 2015

International Journal of Adhesion and Adhesives

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“…While the effectiveness of plasma treatments on the adhesive bonding of aluminium were proved in [12,[18][19][20][21]. On the other hand, despite laser cleaning treatments are an emerging technology, there are many study that demonstrate the effectiveness of this treatment in the cleaning of surfaces and/or in joint preparation [22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Effect of Laser and Plasma Surface Cleaning on Mechanical Properties of Adhesive Bonded Joints

et al. 2015

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The use of adhesives in place of traditional joining techniques as welding and riveting is becoming increasingly common in structural design. Compared to other conventional joining processes, adhesive bonding offers several advantages: including acoustic insulation, vibration attenuation, structure lightening, corrosion reduction and uniform stress distribution. These benefits can be offset if the surfaces to be bonded are not carefully cleaned, degreased and prepared. Many approaches to surface treatments based on physical or chemical modifications have been developed in the years in order to improve the surface activity. Although widely used and very efficient, these techniques present several disadvantages. Physical methods based on mechanical abrasion are supposed to extend bonding area as they increase the roughness, but cause an extensive degradation to the specimens and they are often not easy to reproduce. On the other hand, chemical treatments are typically used with the aim of modifying both morphology and chemical structure of the substrates layers, but they present serious environmental problems of waste disposal, which has moved investigations to an industrial alternative to these processes. According, the use of energetic methods of surface cleaning, such as laser and plasma cleaning processes have been recently consolidated since they are useful to modify the topmost layers of the substrates, increasing their reactivity, without affecting the bulk material properties. These treatments offer an effective and environment-friendly processing of different materials, providing strong and durable bonds with adhesives through modification of the surface morphology and functionalities. In this study, the effects of laser and low pressure plasma treatments on mechanical properties of adhesive bonded joints has been investigated and compared performing lap-shear tests

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“…ytterbium (Yb) fiber laser. [6][7][8][9][10][11][12] Experimental data have shown that pulsed laser ablation (PLA) can induce a beneficial action on the strength of adhesive joints because of simultaneous modifications of surface morphology and chemistry. [13][14][15] Previous work carried out by the authors indicated that PLA of steel and aluminum substrates enhance the mechanical behavior of single lap joints (SLJ) because of the increased contact area between the adhesive and the substrates, the improved mechanical interlocking and chemical (interfacial) interactions.…”

Section: Introductionmentioning

confidence: 99%

On the effect of pulsed laser ablation on shear strength and mode I fracture toughness of Al/epoxy adhesive joints

Chiodo

Alfano

Pini

et al. 2015

Journal of Adhesion Science and Technology

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The present work describes an experimental study about the shear strength and the mode I fracture toughness of adhesive joints with substrates pre-treated by pulsed laser ablation. An ytterbium-doped pulsed fiber laser was employed to perform laser irradiation on AA6082-T4 alloy. Morphological and chemical modifications were evaluated by means of surface profilometry, scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Thick adherend shear tests were carried out in order to assess the shear strength while the mode I fracture toughness was determined using the double cantilever beam. For comparison, control samples were prepared using classical surface degreasing. The results indicated that laser ablation has a favorable effect on the mechanical behavior of epoxy bonded joints; however, while a + 20% increase was recorded for shear strength, a remarkable threefold enhancement of fracture toughness was observed with respect to control samples. XPS analyses of treated substrates and SEM observations of the fracture surfaces indicated that laser pre-treatment promoted chemical and morphological modifications able to sustain energy dissipation through mechanical interlocking. As a result cohesive failure within the adhesive bond-line was enabled under predominant peel loading.

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Surface analytical characterisation of Nd:YAG-laser pre-treated Al Mg3 as a preparation for bonding

Cited by 22 publications

References 22 publications

Enhancement of static strength and long term durability of steel/epoxy joints through a fiber laser surface pre-treatment

Enhancement of static strength and long term durability of steel/epoxy joints through a fiber laser surface pre-treatment

Effect of Laser and Plasma Surface Cleaning on Mechanical Properties of Adhesive Bonded Joints

On the effect of pulsed laser ablation on shear strength and mode I fracture toughness of Al/epoxy adhesive joints

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