Nanosecond laser texturing for high friction applications

Dunn, Andrew K.; Carstensen, Jesper Vejlø; Wlodarczyk, Krystian Lukasz; Hansen, Erica B.; Gabzdyl, Jack; Harrison, Paul M.; Shephard, Jonathan D.; Hand, Duncan Paul

doi:10.1016/j.optlaseng.2014.05.003

Cited by 77 publications

(22 citation statements)

References 18 publications

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“…Several techniques, from organic/inorganic coating to surface texturing, have been reported to improve the functionalities of these substrates, including mechanical properties such as wettability, friction and wear behaviour, to extend the lifetime of mechanical systems 1 – 3 . Recently, laser surface texturing has been addressed as one of the most promising approaches for decreasing/increasing the friction coefficient under dry and lubricated conditions 4 – 8 . The most important advantages of laser surface engineering are its flexibility, accuracy, chemical-free production, lack of tool wear and negligible effect on the properties of bulk material 8 .…”

Section: Introductionmentioning

confidence: 99%

Wettability and friction control of a stainless steel surface by combining nanosecond laser texturing and adsorption of superhydrophobic nanosilica particles

Conradi

Drnovšek

Gregorčič

2018

Sci Rep

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In this work, we present functionalization of AISI 316 L surfaces by nanosecond Nd:YAG laser texturing and adsorption of superhydrophobic fluoroalkylsilane functionalized 30-nm silica nanoparticles. Surface modification by varying the distance between laser-produced micro(μ)-channels leads to different surface roughnesses. After nanosilica coating, the superhydrophilic laser-textured surfaces change into superhydrophobic surfaces with the same μ-roughness. A higher μ-channel density leads to more hydrophobic surfaces after coating. This enables a study of the combined effect of surface wettability and morphology on the friction coefficient and wear resistance. Experiments were performed in dry and water environments. In the case of dry friction, increased μ-roughness leads to a higher friction coefficient, and the water-repellency modification by nanosilica particles has no influence on the tribological behaviour. In contrast, in the water environment, the wettability presents an important contribution to the properties of contact surfaces: hydrophobic surfaces exhibit a lower friction coefficient, especially at higher densities of μ-channels. Energy-dispersive X-ray spectroscopy analysis of surfaces before and after the tribological experiments is performed, revealing the difference in weight % of Si in the worn surface compared to the unworn surface, which varies according to the nature of the surface morphology due to laser texturing in both dry and water environments.

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Section: Introductionmentioning

confidence: 99%

Wettability and friction control of a stainless steel surface by combining nanosecond laser texturing and adsorption of superhydrophobic nanosilica particles

Conradi

Drnovšek

Gregorčič

2018

Sci Rep

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“…While "Laser structuring" describes the general usage of pulsed laser ablation for forming structures, "Laser texturing" means the defined application of a desired surface topography on a work piece. The introduction of dimples on a surface can be classified and is better defined as a structuring process, since we are producing a 3D geometrically defined form with defined pattern on the surface [9,[20][21][22][23].…”

Section: Surface Dimple Structures Designmentioning

confidence: 99%

Friction Analyses of Dimple-Structured Surface

Stoeterau¹,

Janßen²,

Mallmann³

2016

JMEA

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This paper proposes an investigation of the effects of laser engineering surface with dimple operating under lubrication. Dimples with semi-spherical geometry, with 100 μm in diameter and 25 μm in depth, were Laser-machined on the surfaces of high speed steel AISI H13 discs, with three different distribution densities applied over the surface. Pin-on-disc experiments were performed by using counter bodies made with AISI 440C and Tungsten carbide ISO K20 pins. The experiments provided data information on the influence of dimple distribution on the coefficient of friction. Numerical simulations were performed to understand the influence of the pin and disc surface roughness on the contact problem. The results suggest that the design of dimple-structured surfaces rely on nine main parameters: material contact pair and its respective hardness, Young Modulus, the roughness of the surfaces, the dimple design, the dimple distribution, the load applied, the velocity and the type of lubricant. A better performance can be obtained from a compromise solution over these parameters, and the dimple concentration has a dominance over the other parameters. The best results were obtained with a lower concentration of dimples, under higher speed and load. Numerical simulations can also be used as a design tool, supporting decisions regarding shape and distribution of the dimples and material selections for the contact pair.

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“…Therein, it was demonstrated that the static COF of frictional engaged connections (cam, press fittings) can be increased by laser fabricated molten and re-solidified bulged microscopic structures [11,12]. In another recent approach, laser made dimples were identified being valuable for COF enhancement in dry friction contacts [13][14][15]. As a specialty, the microscopic dimples produced on the surface were surrounded by prominent molten and re-solidified walls potentially enhancing the In another recent approach, laser made dimples were identified being valuable for COF enhancement in dry friction contacts [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…In another recent approach, laser made dimples were identified being valuable for COF enhancement in dry friction contacts [13][14][15]. As a specialty, the microscopic dimples produced on the surface were surrounded by prominent molten and re-solidified walls potentially enhancing the In another recent approach, laser made dimples were identified being valuable for COF enhancement in dry friction contacts [13][14][15]. As a specialty, the microscopic dimples produced on the surface were surrounded by prominent molten and re-solidified walls potentially enhancing the mechanical interconnection along with higher adhesive friction forces for the joint frictional contact.…”

Section: Introductionmentioning

confidence: 99%

High-Rate Laser Surface Texturing for Advanced Tribological Functionality

et al. 2020

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This article features with the enhancement of the static coefficient of friction by laser texturing the contact surfaces of tribological systems tested under dry friction conditions. The high-rate laser technology was applied for surface texturing at unprecedented processing rates, namely using powerful ultrashort pulses lasers in combination with ultrafast polygon-mirror based scan systems. The laser textured surfaces were analyzed by ion beam slope cutting and Raman measurements, showing a crystallographic disordering of the produced microscopic surface features. The laser induced self-organizing periodic surface structures as well as deterministic surface textures were tested regarding their tribological behavior. The highest static coefficient of friction was found of µ20 = 0.68 for a laser textured cross pattern that is 126% higher than for a fine grinded reference contact system. The line pattern was textured on a shaft-hub connection where the static coefficient of friction increased up to 75% that demonstrates the high potential of the technology for real-world applications.

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Nanosecond laser texturing for high friction applications

Cited by 77 publications

References 18 publications

Wettability and friction control of a stainless steel surface by combining nanosecond laser texturing and adsorption of superhydrophobic nanosilica particles

Wettability and friction control of a stainless steel surface by combining nanosecond laser texturing and adsorption of superhydrophobic nanosilica particles

Friction Analyses of Dimple-Structured Surface

High-Rate Laser Surface Texturing for Advanced Tribological Functionality

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