Time efficient laser modification of steel surfaces for advanced bonding in hybrid materials

AbstractLaser surface treatment of metals is one option to improve their properties for adhesive bonding. In this paper, a pulsed YVO4 Laser source with a wavelength of 1064 nm and a maximum power of 25 W was utilized to increase the surface area of the steel HCT490X in order to improve its bonding properties with a carbon fibre reinforced polymer (CFRP). Investigated was the influence of the scanning speed of the laser source on the bonding properties. For this purpose, the steel surfaces were ablated at a scanning speed between 1500 and 4500 mm/s. Afterwards the components were bonded with the adhesive HexBond™ 677. After lap shear tests were carried out on the specimen, the surfaces were inspected using scanning electron microscopy (SEM). The experiments revealed that the bonding quality can be improved with a high scanning speed, even when the surface is not completely ablated.

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Experimental Evaluation of Cutting Quality of Carbon Fibre Reinforced Polymer with Pulsed Laser

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.868.172 ◽

2017 ◽

Vol 868 ◽

pp. 172-177 ◽

Cited By ~ 1

Author(s):

Li Jun Yang ◽

Xiao Liang Cheng ◽

Gen Wang Wang ◽

Qing Ming Xue ◽

Ye Ding ◽

...

Keyword(s):

Carbon Fibre ◽

Pulsed Laser ◽

Scanning Speed ◽

Processing Parameters ◽

Parameters Optimization ◽

High Modulus ◽

Reinforced Polymer ◽

Carbon Fibre Reinforced Polymer ◽

Fibre Reinforced Polymer

To investigate the cutting quality of Carbon Fibre Reinforced Polymer (CFRP) with pulsed laser, experiments of high modulus CFRP were carried out using a Nd: YAG pulsed laser with wavelength of 1064nm. Experiments with five factors and five levels were designed to apply the response surface methodologies (RSM). The influence rule of processing parameters consisting scanning speed, pulse frequency, pulse energy, pulse duration and gas pressure on the morphology of machining region including the kerf width, kerf taper and the width of heat affected zone were studied, and the interactions of these input parameters on cutting qualities were also analyzed. Parameters optimization were conducted based on the mathematical model using the optimization software Design Expert. Verification experiments were carried out to prove the adequacy of the optimization results. The infrared laser with pulsed mode was found to be an effective method in processing high modulus CFRP.

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Bonding Properties of Carbon Fibre Reinforced Polymer (Cfrp) Reinforcing Bar in High-Strength Concrete with Mineral Admixtures

Polymers and Polymer Composites ◽

10.1177/096739110901700903 ◽

2009 ◽

Vol 17 (9) ◽

pp. 545-556 ◽

Cited By ~ 1

Author(s):

Chan-Gi Park ◽

Jong-Ok Kim ◽

Seung-Ki Park ◽

Nam-Su Jung ◽

Jong-Pil Won

Keyword(s):

Carbon Fibre ◽

High Strength Concrete ◽

High Strength ◽

Mineral Admixtures ◽

Strength Concrete ◽

Reinforcing Bar ◽

Reinforced Polymer ◽

Carbon Fibre Reinforced Polymer ◽

Bonding Properties ◽

Fibre Reinforced Polymer

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A Study on the Effects of Surface Energy and Topography on the Adhesive Bonding of Aluminum Alloy

Korean Journal of Metals and Materials ◽

10.3365/kjmm.2021.59.8.567 ◽

2021 ◽

Vol 59 (8) ◽

pp. 567-574

Author(s):

Gilho Kang ◽

Wonjong Choi

Keyword(s):

Surface Roughness ◽

Aluminum Alloy ◽

Surface Energy ◽

Adhesive Bonding ◽

Salt Spray ◽

Hot Water ◽

Aluminum Surface ◽

Surface Pretreatment ◽

Lap Shear ◽

Bonding Properties

The bonding properties of adhesives are mainly affected by surface roughness, topography and chemical adsorption. In this paper, we studied the effects of surface pretreatment of Al 2024-T3 (bare) in terms of surface roughness, topography and surface free energy. Surface pre-treatment included solvent cleaning, FPL etching, PAA and CAA treatment. The surface energy and roughness of the aluminum surface were significantly increased by the anodizing treatment. Single lap shear and fatigue tests were performed to investigate bonding properties and durability. The evaluation revealed that the surface energy and surface roughness resulting from the aluminum surface treatment had a significant impact on bonding properties and durability. PAA treated surfaces had the highest bonding strength, and CAA treated surfaces had superior bonding retention performance in hot water or salt spray environments. The results of the fatigue test most clearly demonstrated how the surface pretreatment of the aluminum alloy differently affected bonding performance.

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Development of an anchorage prototype for CFRP stress-ribbon systems using 3D printing technique

The proceedings of the 13th international conference "Modern Building Materials, Structures and Techniques" (MBMST 2019) ◽

10.3846/mbmst.2019.138 ◽

2019 ◽

Author(s):

Viktor Gribniak ◽

Aleksandr K. Arnautov ◽

Arvydas Rimkus

Keyword(s):

3D Printing ◽

Adhesive Bonding ◽

High Strength ◽

Shear Stresses ◽

Major Drawback ◽

Pedestrian Bridges ◽

Printing Technique ◽

Carbon Fibre Reinforced Polymer ◽

Fibre Reinforced Polymer ◽

3D Printing Technique

Compared with other structure types, stress-ribbon systems are extremely simple though requiring massive anchorage blocks because of very large tensile stresses induced in the ribbons. Such structural systems are efficient in pedestrian bridges. A major drawback of these systems is related to corrosion of the steel ribbons. Unidirectional carbon fibre reinforced polymer (CFRP) has a high potential for replacing steel in the ribbons because of lightweight, high strength, and excellent resistance to corrosion and fatigue. Application of CFRP materials, however, faced serious problems due to construction of the anchorage joints. Thus, the anchorage system is the object of this research. Adhesive bonding is a simplest technology for joining structural components made of CFRP composites with polymer matrix. In the adhesion joints, the loads are transferred due to the shear effect. However, a relatively low inter-laminar shear strength of CFRP decreases effectiveness of the gripping systems. Brittle failure of the bond is often consequence of stress concentration. An innovative anchorage joint is proposed to control shear stresses by varying a local curvature of the contact surface. A natural shape of Nautilus shell was chosen for the gripping system, whereas a 3D printing technique was applied for the prototyping purpose. Mechanical behaviour of the anchorage prototypes made of printed polymeric material was investigated experimentally.

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