Tribological behaviours of textured surfaces under conformal and non-conformal starved lubricated contact conditions

The aim of the present research was to investigate surface topography in terms of different surface roughness parameters and to correlate surface topography change to friction of contact surfaces. For this purpose, different 100Cr6 plate samples with different surface topography were prepared. Using different grades and combinations of grinding and polishing samples with similar Ra values, but different Rku and Rsk values were obtained. To evaluate influence of roughness parameters on friction and wear, dry and lubricated pin-on-disc tests were carried out under different contact conditions. Test results indicate that high Rku and negative Rsk values lead to decrease in friction. To investigate the effect of surface texturing on surface roughness parameters, real roughness profiles were virtually altered to achieve virtually textured surfaces. Using NIST SMATS softgauge for calculation of surface roughness parameters, virtually altered roughness profiles were investigated in terms of texture size, shape and spacing, and their influence on surface roughness parameters, especially on skewness and kurtosis. Lower diameter, higher spacing and wedge-shaped dimples reflect in higher Rku and more negative Rsk parameters.

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Lubrication of Rough Surfaces by a Boundary Film-Forming Viscosity Modifier Additive

Journal of Tribology ◽

10.1115/1.1828069 ◽

2005 ◽

Vol 127 (1) ◽

pp. 223-229 ◽

Cited By ~ 20

Author(s):

R. P. Glovnea ◽

A. V. Olver ◽

H. A. Spikes

Keyword(s):

Rough Surface ◽

Rough Surfaces ◽

Viscosity Index ◽

Functionalized Polymers ◽

Contact Conditions ◽

Film Forming ◽

Boundary Film ◽

Surface Contact ◽

Lubricated Contact ◽

Rough Surface Contact

In previous work it was shown that some functionalized polymers used as viscosity index improvers are able to form thick boundary lubricating films. This behavior results from adsorption of the polymer on metal surfaces to form a layer of enhanced viscosity adjacent to the surface. In the current work the behavior of one such polymer in rough surface contact conditions is studied, using both model and real rough surfaces. It is found that the polymer is able to form a thick boundary film in rough surface contact, just as it does with smooth surfaces. It is also shown that the effect of this boundary film is to significantly reduce friction in rolling-sliding, rough surface, lubricated contact.

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Tribology of ethylene–air diffusion flame soot under dry and lubricated contact conditions

Journal of Physics D Applied Physics ◽

10.1088/0022-3727/44/48/485401 ◽

2011 ◽

Vol 44 (48) ◽

pp. 485401 ◽

Cited By ~ 7

Author(s):

Hiralal Bhowmick ◽

S K Biswas

Keyword(s):

Diffusion Flame ◽

Contact Conditions ◽

Lubricated Contact ◽

Air Diffusion

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Friction and wear behavior of shot peened surfaces of 36CrNiMo4 and 36NiCrMo16 alloyed steels under dry and lubricated contact conditions

Applied Surface Science ◽

10.1016/j.apsusc.2013.11.050 ◽

2014 ◽

Vol 290 ◽

pp. 223-232 ◽

Cited By ~ 33

Author(s):

Slobodan Mitrovic ◽

Dragan Adamovic ◽

Fatima Zivic ◽

Dragan Dzunic ◽

Marko Pantic

Keyword(s):

Friction And Wear ◽

Wear Behavior ◽

Contact Conditions ◽

Friction And Wear Behavior ◽

Lubricated Contact

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Unexpected Frictional Behavior of Laser-Textured Hydrophobic Surfaces

Lubricants ◽

10.3390/lubricants9030031 ◽

2021 ◽

Vol 9 (3) ◽

pp. 31

Author(s):

Hiba Jendoubi ◽

Olga Smerdova ◽

Noël Brunetière

Keyword(s):

High Pressure ◽

Regime Theory ◽

Textured Surfaces ◽

Hydrophobic Surfaces ◽

Frictional Behavior ◽

Low Surface Energy ◽

Energy Material ◽

Circular Holes ◽

Lubricated Contact ◽

Generation Of Vortices

Hydrophobic surfaces can allow a liquid to slip over the surface and can thus reduce friction in lubricated contact working in a full film regime. Theory supports that the amount of slip can be increased if super-hydrophobic surfaces that are composed of a textured low surface energy material are used. In this work, polytetrafluoroethylene (PTFE) polymer samples were textured with a femto second laser to create super-hydrophobic surfaces by machining a hexagonal network of small circular holes with 10 and 20 μm lattice sides. The frictional behavior of these surfaces was compared to the smooth PTFE samples. Surprisingly, the textured surfaces revealed higher friction coefficients than the smooth surfaces. This higher friction can be explained by a change of wetting regime due to high pressure in fluid and a possible generation of vortices in the cavities.

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Effect of Surface Roughness Parameters and Surface Texture for Reduced Friction

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.695.572 ◽

2014 ◽

Vol 695 ◽

pp. 572-575

Author(s):

Samion Syahrullail ◽

Noorawzi Nuraliza

Keyword(s):

Surface Roughness ◽

Friction And Wear ◽

Test Results ◽

Textured Surfaces ◽

Roughness Parameters ◽

Contact Conditions ◽

Surface Roughness Parameters ◽

Roughness Analysis ◽

Pin On Disk ◽

Effect Of Surface

The aim of the present research was to investigate the possibility of contact surfaces with reduced friction using surface roughness analysis. For this purpose, various aluminum pin samples with different lubricant using different sliding speed values were prepared. To evaluate influence of roughness parameters on friction and wear, lubricated pin-on-disk tests were carried out under different speed contact conditions. Test results show that surfaces with high values surface roughness results in reduced friction. To investigate the effect of surface topography on surface roughness parameters and consequently on friction, real roughness profiles were virtually altered to achieve virtually textured surfaces.

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