Laser Microtextured Surfaces for Friction Reduction: Does the Pattern Matter?

Putignano, Carmine; Parente, Giuliano; Profito, Francisco Josè; Gaudiuso, Caterina; Ancona, Antonio; Carbone, Giuseppe

doi:10.3390/ma13214915

Open AccessArticle

Laser Microtextured Surfaces for Friction Reduction: Does the Pattern Matter?

by

Carmine Putignano

^1,2,*

,

Giuliano Parente

¹,

Francisco Josè Profito

³,

Caterina Gaudiuso

²,

Antonio Ancona

²

and

Giuseppe Carbone

^1,2

¹

Department of Mechanics, Mathematics and Management, Politecnico di Bari, 70126 Bari, Italy

²

Institute for Photonics and Nanotechnologies-IFN-CNR, U.O.S, Physics Department “M. Merlin”, 70126 Bari, Italy

³

Department of Mechanical Engineering, Polytechnic School of the University of São Paulo, 01000 São Paulo, Brazil

^*

Author to whom correspondence should be addressed.

Materials 2020, 13(21), 4915; https://doi.org/10.3390/ma13214915

Submission received: 14 September 2020 / Revised: 12 October 2020 / Accepted: 19 October 2020 / Published: 31 October 2020

(This article belongs to the Special Issue Tribology: Friction and Wear of Engineering Materials)

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Abstract

Frictional performances of different textures, including axisymmetric and directional patterns, have been tested in the mixed and the hydrodynamic lubrication regimes. Experimental results, corroborated by numerical simulations, show that the leading parameter is the geometrical pattern void ratio since a large number of dimples offers, at low speed, a trap for debris whereas, at high speed, due to the flow expansion in each micro-hole, fosters a fluid pressure drop, the consequent insurgence of micro-cavitation and, ultimately, the reductions of the shear stresses. Furthermore, in this paper, it is shown that, by means of directional textures, equivalent hydrodynamic wedges can be built up, thus establishing different friction performances depending on the flow direction.

Keywords: lubrication; laser micro-texturing; friction reduction

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MDPI and ACS Style

Putignano, C.; Parente, G.; Profito, F.J.; Gaudiuso, C.; Ancona, A.; Carbone, G. Laser Microtextured Surfaces for Friction Reduction: Does the Pattern Matter? Materials 2020, 13, 4915. https://doi.org/10.3390/ma13214915

AMA Style

Putignano C, Parente G, Profito FJ, Gaudiuso C, Ancona A, Carbone G. Laser Microtextured Surfaces for Friction Reduction: Does the Pattern Matter? Materials. 2020; 13(21):4915. https://doi.org/10.3390/ma13214915

Chicago/Turabian Style

Putignano, Carmine, Giuliano Parente, Francisco Josè Profito, Caterina Gaudiuso, Antonio Ancona, and Giuseppe Carbone. 2020. "Laser Microtextured Surfaces for Friction Reduction: Does the Pattern Matter?" Materials 13, no. 21: 4915. https://doi.org/10.3390/ma13214915

APA Style

Putignano, C., Parente, G., Profito, F. J., Gaudiuso, C., Ancona, A., & Carbone, G. (2020). Laser Microtextured Surfaces for Friction Reduction: Does the Pattern Matter? Materials, 13(21), 4915. https://doi.org/10.3390/ma13214915

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

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Laser Microtextured Surfaces for Friction Reduction: Does the Pattern Matter?

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