Microlubrication effect by laser-textured steel surfaces

Andersson, Peter; Koskinen, Jari; Varjus, Simo; Gerbig, Y.; Haefke, H.; Georgiou, S.; Zhmud, Boris; Buss, W.

doi:10.1016/j.wear.2006.06.003

Cited by 224 publications

(137 citation statements)

References 14 publications

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“…Wakuda et al [33] studied the influences of the dimple size, density, and shape on the friction behavior of a contact formed by the textured ceramic disk and the non-textured steel pin under the contact pressure of 0.78GPa and the sliding speed ranging from 0.012 to 1.2 m/s. The results showed the effects of the dimple size and density on the friction reduction were similar to those under the low loading condition [23][24][25]29]. The shape of the dimple, however, was found to have negligible impact on the friction, contradicting the findings of Galda et al [25] and Yu et al [30] where the loads were much lower.…”

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confidence: 63%

“…At the high end of the speed range, however, the advantage of the dimple texture diminished. Andersson et al [24] measured the friction coefficient and the wear scar of the contact between a stationary ball and an oscillating disk, with the sliding speed being limited between 0.04 m/s and 0.16 m/s. Under the starved lubrication condition, the laser-textured disk was shown to be able to improve the friction and wear performance significantly in comparison to the nontextured surface.…”

Section: Literature Reviewmentioning

confidence: 99%

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The Effects of Microdimple Texture on the Friction and Thermal Behavior of a Point Contact

Parmar

2018

Journal of Tribology

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This study investigates the effects of the micro-dimple texture on the friction and surface temperature performances of a ball-on-disk contact, operating under the speed and load ranges that cover typical gearing applications. Circular shaped micro-dimple arrays with different dimple center distances and dimple depths are implemented on the ball surface to quantify the impacts of these two parameters on the friction coefficient and the maximum ball surface temperature. In addition, the contacts of three surface texture combinations, namely micro-dimpled and polished ball surface versus polished disk surface, polished ball surface versus polished disk surface and ground ball surface versus ground disk surface, are compared to demonstrate any beneficial or detrimental effect of micro-dimples in heavily loaded high speed applications. This study adopts a thermal mixed EHL point contact model, whose capability and accuracy have been well demonstrated by comparing to the experimental measurements, to quantify the deterministic tribological behavior within the contact, allowing the exploration of the underlying mechanism that governs the role of micro-dimples in the elastohydrodynamic lubrication.iv

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mentioning

confidence: 63%

Section: Literature Reviewmentioning

confidence: 99%

The Effects of Microdimple Texture on the Friction and Thermal Behavior of a Point Contact

Parmar

2018

Journal of Tribology

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“…To manufacture such surfaces efficiently, fast, repeatable, low cost micro manufacturing techniques are required. Laser surface texturing (LST) is one such technique and is popular for the production of low friction, structured surfaces [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Study of manufacturing and measurement reproducibility on a laser textured structured surface

et al. 2016

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The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. AbstractIn recent years there has been increasing interest in the use of structured surfaces to provide specific functional performance. Such surfaces often consist of localised micro scale surface features with predetermined geometries. The performance of the feature manufacturing process affects the functional performance of the surface, and can be assessed by measurement of the resulting surface features. Measurement of the resulting micro manufactured surface features necessitates use of areal optical surface topography instruments. However, conventional characterisation methods, based on areal surface texture parameters, often prove inadequate, and may fail to capture the relevant geometric properties needed for an effective dimensional verification. This paper investigates an alternative route to verification, based on the determination of geometric attributes of the micro fabricated features. This approach allows for direct assessment of manufacturing process performance, by comparison of the geometric attributes with their nominal values. An example application is shown in which a micromachining process (laser texturing) is used to fabricate a periodic pattern of dimples, which provide a low friction bearing surface. In this paper, manufacturing process performance is assessed by characterisation of the diameter and out of roundness. Sources of uncertainty associated with these geometric parameters are also considered.

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“…These advantages include improved hydrodynamic lubrication, capture of negative abrasives, action as a lubricant reservoir, and promotion of a cooling effect on the sealing surface. Previous research experimentally demonstrated the usefulness of artificially-fabricated surface texture in extending load-carrying capacity in water [10,11] and oil [12,13] environments. However, the effect of surface texture on frictional properties in a blood or plasma environment [14], mainly consists of water, electrolyte and abundant proteins [14], has not yet been investigated.…”

Section: Introductionmentioning

confidence: 99%

Influence of Surface Texture on Friction Properties of Mechanical Seals for Blood -Design Concept of Sealing Surface of Mechanical Seal for Ventricular Assist Device-

Kanda

Sato

Kinoshita³

et al. 2016

Tribology Online

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Low, stable friction, a higher load-carrying capacity, and lower leakage of sealed blood are required for mechanical seals in implantable ventricular assist devices. One solution is to apply surface texture to the mechanical seal surface, consisting of self-mated silicon carbide. However, the effect of surface texture on the frictional properties of mechanical seals under blood sealing conditions has not yet been studied. Therefore, this study aimed to clarify the effect of surface texture on fundamental frictional properties of mechanical seals and to propose design concepts for mechanical seals in ventricular assist devices. The results show that surface texture increases the critical load of mechanical seals, although it also causes periodic peaks in friction. Further, it was found that surface texture induces the formation of denatured protein aggregates on the sealing surface, also inducing periodic surface friction peaks. The frictional properties of the mechanical seals were stabilized by creating small, dispersed concave features with wet blast fabrication, followed by coating with diamond-like carbon. Lower and more stable frictional properties were thus achieved, while simultaneously ensuring a higher critical load.

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Microlubrication effect by laser-textured steel surfaces

Cited by 224 publications

References 14 publications

The Effects of Microdimple Texture on the Friction and Thermal Behavior of a Point Contact

The Effects of Microdimple Texture on the Friction and Thermal Behavior of a Point Contact

Study of manufacturing and measurement reproducibility on a laser textured structured surface

Influence of Surface Texture on Friction Properties of Mechanical Seals for Blood -Design Concept of Sealing Surface of Mechanical Seal for Ventricular Assist Device-

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