Action of a femtosecond laser generated micro-cavity passing through a circular EHL contact

Mourier, Louis; Mazuyer, Denis; Lubrecht, Antonius; Donnet, Christophe; Audouard, Éric

doi:10.1016/j.wear.2006.08.037

Cited by 38 publications

(13 citation statements)

References 30 publications

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“…The method is used especially for excimer lasers where the beam is guided, focused, and concentrated through a system of lens, while the process is controlled through the plane movement of geometry support as shown in Figure 4(a). [98][99][100][101] The mask allows the creation of various shaped micro features (circles, squares, triangles, etc.). The technique is flexible and fast, with a very good accuracy and resolution.…”

Section: Removing Materials Technologiesmentioning

confidence: 99%

Manufacturing textured surfaces: State of art and recent developments

Coblas

Fatu

Maoui

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part J:

129

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Surface texturing and its influence on tribological systems performances represent one of the main research topics nowadays. Textures functionality is initially ensured by correct optimization of its geometrical parameters, but the influence of textures quality is not to be neglected. Therefore, a proper selection of fabrication methods appropriate for each individual application is imperative. The process of selection is somehow exhaustive due to abundance of parameters and selection criterions. Hence, this paper proposes a general classification of texture manufacturing techniques, used nowadays within industrial manufacturing and research platforms, with pertinent description of each process including key advantages and drawbacks concerning their application within mechanical systems.

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Section: Removing Materials Technologiesmentioning

confidence: 99%

Manufacturing textured surfaces: State of art and recent developments

Coblas

Fatu

Maoui

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part J:

129

View full text Add to dashboard Cite

show abstract

“…Surface texturing has gained increasing attention over the last three decades. Boosted by the work of Etsion and co-workers in the 90's [16,22,23], surface textures have been shown capable of beneficially affecting friction and wear under dry friction conditions [24,25] as well as boundary [26][27][28][29], mixed [30][31][32][33], elastohydrodyamic (EHL) [34][35][36] and full-film hydrodynamic lubrication [37][38][39]. Under dry conditions, surface textures help to reduce the real area of contact and trap wear debris, thus lowering friction and extending wear life [18].…”

Section: Introductionmentioning

confidence: 99%

Synergetic effects of surface texturing and solid lubricants to tailor friction and wear – A review

Rosenkranz

Costa

Baykara

et al. 2021

Tribology International

334

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Surface texturing and solid lubricants have demonstrated the ability to substantially reduce friction and wear under dry conditions. In recent decades, these two technologies have been combined to leverage the advantages of both for superior tribological performance. This review article first summarizes the state-of-the-art regarding surface texturing and solid lubricants, including soft metals, polytetrafluoroethylene, diamond-like carbon and 2D layered materials. Then, the synergy between surface textures and solid lubricants is discussed, with particular emphasis on the underlying mechanisms. Finally, gaps in the existing understanding of these synergies are identified and opportunities for future research are suggested.

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“…These were analysed by optical microscopy, scanning electron microscopy, and white-light interferometry. The influence of both the number of laser pulses sent to the steel surface and the energy density received by the irradiated zone has been discussed in a previous paper [37]. Varying these two parameters allows one to optimize the dimensions and the quality of the shapes produced ( Fig.…”

Section: Laser Surface Texturingmentioning

confidence: 98%

Lubrication mechanisms with laser-surface-textured surfaces in elastohydrodynamic regime

Mourier

Mazuyer

Ninove

et al. 2010

Proceedings of the Institution of Mechanical Engineers, Part J:

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Micro-texturing is very efficient to make surfaces super-hydrophobic according to a physical process known as 'lotus effect'. In the recent past, tribologists have also investigated surface texturing because it could be a promising way to increase the lifetime of contacts or to make its working conditions more severe. Moreover, significant friction coefficient reductions have been obtained with textured surfaces in different lubrication regimes. In this presentation, transient lubrication phenomena induced by laser-made circular dimples passing through an elastohydrodynamic lubrication point contact are analysed both experimentally and numerically. Under rolling-sliding conditions, the passage of an isolated dimple modifies the film thickness distribution. Deep dimples induce an oil film failure. On the contrary, a shallow dimple locally generates a large increase in the film thickness. Dimples geometry and the slide/roll ratio modify the pressure distribution and then control the level and extension of the local film reinforcement. Experiments are simulated numerically with a two-dimensional multi-grid solver. This allows one to have a better understanding of the lubrication mechanism with a textured surface as a function of dimple geometry, entrainment speed, and contact pressure. The key point is the control of tribological conditions to maintain the viscosity of the lubricant high enough inside the dimple in order that the shearing can expel it to locally enhance the film thickness.

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Action of a femtosecond laser generated micro-cavity passing through a circular EHL contact

Cited by 38 publications

References 30 publications

Manufacturing textured surfaces: State of art and recent developments

Manufacturing textured surfaces: State of art and recent developments

Synergetic effects of surface texturing and solid lubricants to tailor friction and wear – A review

Lubrication mechanisms with laser-surface-textured surfaces in elastohydrodynamic regime

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