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Varying the geometry of laser surface microtexturing to enhance the frictional behavior of lubricated steel surfaces (Contributo in atti di convegno)

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Varying the geometry of laser surface microtexturing to enhance the frictional behavior of lubricated steel surfaces (Contributo in atti di convegno) (literal)

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Mezzapesa, Francesco Paolo; Scaraggi, Michele; Carbone, Giuseppe; Sorgente, Donato; Ancona, Antonio; Lugarà, Pietro Mario (2013)
Varying the geometry of laser surface microtexturing to enhance the frictional behavior of lubricated steel surfaces
in 7th International WLT Conference on Lasers in Manufacturing, LiM 2013, Munich; Germany, 13-16 May 2013
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Mezzapesa, Francesco Paolo; Scaraggi, Michele; Carbone, Giuseppe; Sorgente, Donato; Ancona, Antonio; Lugarà, Pietro Mario (literal)

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Institute for Photonics and Nanotechnologies, Rome; Universita degli Studi di Bari; Universita del Salento; Politecnico di Bari (literal)

Titolo

Varying the geometry of laser surface microtexturing to enhance the frictional behavior of lubricated steel surfaces (literal)

Abstract

We experimentally investigate and theoretically interpret the effect of varying the microstructure geometry introduced by laser surface texturing (LST), on the frictional properties of interacting components. The ability to control the coefficient of friction under lubricated conditions is demonstrated. Particularly, the LST optimization of a regular pattern of microholes on steel allows to reduce friction over the entire range of sliding velocities with respect to the untextured case. Moreover, we measure the Stribeck curves on a range of sliding velocity covering the entire lubrication range, i.e. from the boundary to the hydrodynamic regime under the so called iso-viscous rigid condition. Our measurements show a friction reduction up to 50% in the hydrodynamic regime. © 2013 The Authors. (literal)

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