Influence on friction behavior of micro-texturing under lubricated non-conformal contact

Segu, Dawit Zenebe; Kim, Seock Sam

doi:10.1007/s11012-013-9806-8

Cited by 36 publications

(31 citation statements)

References 16 publications

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“…Their concept, combining dimples and ellipses, was found to induce faster transitions between lubrication regimes and to reduce the coefficient of friction for conformal conditions as well [20]. Concerning non-conformal conditions, similar effects have been reported for a multiscale texture combining squares and triangles [21].…”

Section: Introductionsupporting

confidence: 59%

“…In addition, authors could prove that laser texturing helped to shift the transition from mixed to full film lubrication to lower sliding velocities. Segu et al [20,21] proposed an innovative approach based on multi-scale textures in an attempt to accelerate transition in the lubrication regimes. Their concept, combining dimples and ellipses, was found to induce faster transitions between lubrication regimes and to reduce the coefficient of friction for conformal conditions as well [20].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Low Depth Surface Texturing on Friction Reduction in Lubricated Sliding Contact

et al. 2018

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Laser surface texturing is an interesting possibility to tailor materials’ surfaces and thus to improve the friction and wear properties if proper texture feature sizes are selected. In this research work, stainless steel surfaces were laser textured by two different laser techniques, i.e., the direct laser interference patterning by using a nanosecond pulsed Nd:YAG laser and additionally by an ultrashort pulsed femtosecond Ti:Sa. The as-textured surfaces were then studied regarding their frictional response in a specially designed linear reciprocating test rig under lubricated conditions with a fully formulated 15W40 oil. Results show that dimples with smaller diameter lead to a significant reduction in the coefficient of friction compared to the dimples with a larger diameter and surfaces with a grid-like surface pattern produced by direct laser interference patterning.

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Section: Introductionsupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Effect of Low Depth Surface Texturing on Friction Reduction in Lubricated Sliding Contact

et al. 2018

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“…In the case of non-conformal contact Segu et al [111] has used multiple shapes on the same substrate. They used square, circle and triangular shapes in combination.…”

Section: Shape Orientation and Position Of Dimplesmentioning

confidence: 99%

An overview of geometrical parameters of surface texturing for piston/cylinder assembly and mechanical seals

et al. 2015

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Surface texturing has been effectively used to improve tribological performance of sliding surfaces. Reduction in friction, increase in hydrodynamic load carrying capacity, reduction in wear and increase in fluid film stiffness are few examples of the benefits that can be obtained by surface texturing. In order to obtain these benefits, several researchers have investigated the effects of surface texturing geometrical parameters on the performance of different applications. If these geometrical parameters are not optimized for each application, they may have detrimental effects on their performance. These geometrical parameters in case of micro dimples include depth, diameter, depth to diameter ratio, shape and density of dimples. In this paper, the author reviews the effects of these geometrical parameters on the performance of two applications piston ring/cylinder assembly and mechanical seals.

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“…Surface morphology plays an important role in solid surface wettability, which has wide applications in engineering practices, such as mechanical seals [1][2][3][4]. Protuberant morphology and concave morphology are two typical textures, which are represented by circle-dimpled and micro-squareconvex morphology, respectively.…”

Section: Introductionmentioning

confidence: 99%

Influence of laser geometric morphology type on SiC surface wettability

Wang

Bai

2015

Sci. China Technol. Sci.

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To obtain effective surface morphology to control surface wettability, this work investigated the influence of protuberant and concave morphology, which are respectively represented by circle-dimpled and micro-square-convex morphology, on surface wettability. The geometric morphologies were processed on silicon carbide (SiC) surfaces by a laser-marking machine, and surface wettability was monitored by the measurement of contact angles using the sessile drop method. Correlation analysis between contact angles and morphology parameters was conducted to determine the extent of influence. The results showed that the circle-dimpled diameter had a significant influence on surface wettability, whereas grooved width did not. Additionally, the depth of dimples and grooves exerted less influence on controlling wetting behaviors. In addition, surface wettability transformed from a superhydrophilic state to a hydrophobic state on micro-square-convex surfaces; contact angles on circle-dimpled surfaces showed a relatively slow transformation, though the surface wettability also underwent the state change.circle-dimpled morphology, micro-square-convex morphology, wettability, SiC Citation:Wang R, Bai S X. Influence of laser geometric morphology type on SiC surface wettability.

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Influence on friction behavior of micro-texturing under lubricated non-conformal contact

Cited by 36 publications

References 16 publications

Effect of Low Depth Surface Texturing on Friction Reduction in Lubricated Sliding Contact

Effect of Low Depth Surface Texturing on Friction Reduction in Lubricated Sliding Contact

An overview of geometrical parameters of surface texturing for piston/cylinder assembly and mechanical seals

Influence of laser geometric morphology type on SiC surface wettability

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