Laser surface treatments for adhesion improvement of aluminium alloys structural joints

Spadaro, Chiara; Sunseri, C.; Dispenza, Clelia

doi:10.1016/j.radphyschem.2007.02.047

Cited by 34 publications

(15 citation statements)

References 13 publications

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“…These authors attributed the outcome mainly to the geometrical changes such as the increase of the surface area, and generation of sub-micron sized locking sites, as well as improved wettability due to generation of titanium oxides. On the other hand Spadaro et al, used a Nd:YAG system to obtain surface textures based on remelting to increase surface area on 2024 aluminum specimens [19]. The results indicated an improvement of up to double the adhesive fracture energy compared to specimens that have been only degreased.…”

Section: Introductionmentioning

confidence: 99%

Effect of Surface Texture on the Adhesion Performance of Laser Treated Ti6Al4V Alloy

Maressa

Anodio

Bernasconi

et al. 2014

The Journal of Adhesion

108

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The growing demand in lighter and safer structures generates the requirement of lighter joining strategies, particularly for lightweight metal alloys, composites, and also joining dissimilar materials together. Titanium alloys stand out as the conventional choice for materials for light weight structures. Adhesive bonding of titanium is an appealing route for joint design, also for the possibility of joining it with dissimilar materials. The realization of a strong joint depends not only on the joint design and type of adhesive, but also on the preparation of the adhering surface. Laser texturing presents advantages compared to common surface preparation processes in terms of eco-compatibility, energetic efficiency, ease of manufacturing, and repeatability. This work presents a preliminary investigation on laser texturing of Ti6Al4 V alloy with a pulsed fiber laser source with the aim to increase surface adhesion for bonding. Particularly, different surface textures are proposed, and laser machining strategies are developed. The results showed that laser texturing provided up to eightfold and 30% higher shear strength compared to plain and sand blasted surfaces, respectively. Failure analysis showed that a margin of improvement is still possible by adapting the surface texture for better cavity filling and reducing surface damage caused by the laser treatment.

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Section: Introductionmentioning

confidence: 99%

Effect of Surface Texture on the Adhesion Performance of Laser Treated Ti6Al4V Alloy

Maressa

Anodio

Bernasconi

et al. 2014

The Journal of Adhesion

108

View full text Add to dashboard Cite

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“…2. Some of the shortcomings are annulated with new technologies, such as laser preparation of adhesion surfaces, which is more described in [26], but there is still research needed in order to make use of such technologies in practice.…”

Section: Comparison With Steelmentioning

confidence: 99%

Applications of aluminium alloys in civil engineering

2017

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Subject reviewAlthough aluminium is a long known structural material, its use is not in accordance with the benefits achieved by its implementation. There are several reasons for such an adverse state. Those that stand out are the late development of a regulative framework for the design of structures, and still the need for improvement, lack of knowledge on application examples and not stressed enough potential areas of use. However, positive trends are present and aluminium alloys are competitive, especially if their positive properties can be utilized and negative properties diminished through purpose oriented design approach. Given examples present good application utilization of aluminium alloys characteristics, and shown new application research can provide directions for further expansion of competitiveness. Structural uses are grouped in suitable areas of application and put into local and global context. Keywords: bridge; façade; refurbishment; roof system; seismic Primjene aluminijskih legura u građevinarstvuPregledni članak Iako je aluminij već dugo prisutan konstrukcijski materijal, uporaba mu nije u skladu s dobrobitima koji se ostvaruju njegovom primjenom. Nekoliko je uzročnika takvog stanja. Ističu se relativno kasni razvoj normativnog okvira za dimenzioniranje konstrukcija, i još uvijek potreba za poboljšanjem, nedovoljna raširenost saznanja o primjenama te nedostatno naglašena potencijalna područja primjene. Međutim, pozitivni trendovi su prisutni, a legure aluminija su konkurentne, posebno ako se njegova pozitivna svojstva mogu iskoristiti, a negativna umanjiti kroz proračunski pristup orijentiran prema namjeni. Prikazani primjeri predstavljaju dobro iskorištavanje karakteristika aluminijskih legura kroz namjenu, a nova istraživanja primjena mogu pružiti oslonac za daljnje proširenje konkurentnosti. Konstrukcijske primjene su prikazane kroz moguća područja i stavljene u lokalni i globalni kontekst.

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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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Laser surface treatments for adhesion improvement of aluminium alloys structural joints

Cited by 34 publications

References 13 publications

Effect of Surface Texture on the Adhesion Performance of Laser Treated Ti6Al4V Alloy

Effect of Surface Texture on the Adhesion Performance of Laser Treated Ti6Al4V Alloy

Applications of aluminium alloys in civil engineering

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

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