Special Issue "Tribological Performance of Textured Surfaces"

A special issue of Lubricants (ISSN 2075-4442).

Deadline for manuscript submissions: closed (31 May 2018)

Special Issue Editor

Guest Editor
Prof. Dr. Pawel Pawlus

Rzeszow University of Technology, Powstancow Warszawy 8 Street, 35-959 Rzeszow, Poland
Website | E-Mail
Interests: surface effects in tribology; surface texturing; fretting; contact mechanics

Special Issue Information

Dear Colleagues,

Surface texturing is an option for reducing the friction of sliding elements in the presence of a lubricant. Dimples (oil pockets, cavities) act as additional reservoirs for lubricants under starved lubricating conditions and traps for wear debris in dry or lubricating sliding; they can also serve as micro-hydrodynamic bearings under full or mixed lubrication. Surface texturing has been known of for many years. It is possible that plateau honing of cylinder liners was the earliest and the most familiar application of surface texturing. Laser texturing is the most common method for the creation of dimples; this method is accessible, precise and easy. A laser is extremely fast and provides excellent control of  the shape and sizes of dimples. Different methods of texturing, such as burnishing (embossing), etching, electron and ion beam texturing,  electric discharge machining, electrochemical machining, abrasive jet machining, honing, drilling, turning, grinding, mechanical polishing, or a combination of these methods, are also possible. Each of these methods has its own advantages and disadvantages. Applications of surface texturing can be found in engine components, disk brakes, bearing and seals, manufacturing tools, biomechanical devices and computer disk drives. Most studies have shown a beneficial effect of surface texturing on the tribological performance of sliding elements. However, apart from successful cases, some  publications also demonstrated detrimental effects of textured surfaces. The design of testures should be carefully done, because surface texturing adds to fabrication costs.

This Special Issue aims at the latest advances in the field of tribological performance of surface texturing under dry and lubricated contacts. Boundary, mixed, hydrodynamic and elasto-hydrodynamic lubrication will be taken into consideration. Contributions dealing with theoretical and experimental studies on surface texturing tribological effects, including successful and unsuccessful cases, are welcome. We are looking forward to receiving your submissions.

Prof. Dr. Pawel Pawlus
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Lubricants is an international peer-reviewed open access quarterly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 350 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • surface texturing
  • dry contact
  • lubricated contact
  • friction
  • wear
  • modelling
  • experiment

Published Papers (5 papers)

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Research

Open AccessArticle The Effect of Surface Texturing on Dry Gross Fretting
Received: 31 July 2018 / Revised: 26 September 2018 / Accepted: 11 October 2018 / Published: 16 October 2018
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Abstract
The effect of steel disc surface texturing on dry gross fretting in a ball-on-disc configuration was studied. Dimples were created with abrasive jet machining. The tribological performance of sliding pairs, steel–steel and steel–ceramics, was experimentally studied. The character of surface texturing effect was
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The effect of steel disc surface texturing on dry gross fretting in a ball-on-disc configuration was studied. Dimples were created with abrasive jet machining. The tribological performance of sliding pairs, steel–steel and steel–ceramics, was experimentally studied. The character of surface texturing effect was related to the dominant wear type. During steel–steel contact, the presence of dimples on disc surfaces could lead to increases in wear and friction. However, the escape of wear debris into dimples could result in reductions of friction and wear in the steel–ceramics configuration. Full article
(This article belongs to the Special Issue Tribological Performance of Textured Surfaces)
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Graphical abstract

Open AccessArticle Combined Analytical and Experimental Evaluation of Frictional Performance of Lubricated Untextured and Partially Textured Sliders
Received: 3 August 2018 / Revised: 30 August 2018 / Accepted: 7 September 2018 / Published: 1 October 2018
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Abstract
The study of textured surface performance is one of the highly researched topics in recent times. This is mainly due to the advantages that such surfaces can potentially provide in practice, in mitigating adverse tribological conditions, such as friction and wear. However, considering
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The study of textured surface performance is one of the highly researched topics in recent times. This is mainly due to the advantages that such surfaces can potentially provide in practice, in mitigating adverse tribological conditions, such as friction and wear. However, considering the complexities found in practice, a methodological analysis and evaluation procedure is essential in order to gain an understanding of the benefits from utilising such features in a given contact. The current study provides a combined analytical and experimental approach towards an enhanced understanding of the behaviour of textured surfaces relative to their untextured counterparts. The developed analytical models are invaluable in providing an insight into the relationship between the many parameters involved in defining even simple surface texture feature geometry and the expected outcomes in practice, when corroborated with experimental results. The current study reports on such an endeavour. With the studied texture configuration, the results have shown the possibility of reducing friction by as much as 25%. Full article
(This article belongs to the Special Issue Tribological Performance of Textured Surfaces)
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Open AccessArticle The Influence of Surface Texturing on the Film Thickness in Starved Lubricated Parallel Sliding Contacts
Received: 27 May 2018 / Revised: 3 July 2018 / Accepted: 4 July 2018 / Published: 11 July 2018
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Abstract
In industrial applications, a starved lubrication condition may occur, leading to a reduction in film thickness; by modifying the surface geometry, the tribological performance of the contact is enhanced. In this paper, the influence of surface texturing as a method for reducing the
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In industrial applications, a starved lubrication condition may occur, leading to a reduction in film thickness; by modifying the surface geometry, the tribological performance of the contact is enhanced. In this paper, the influence of surface texturing as a method for reducing the friction on the film thickness in parallel sliding surfaces for starved lubricated contacts is investigated. The results in this study have shown that surface texturing can improve film formation for starved lubricated contacts and, respectively, the load carrying capacity. The effect of starvation on several texturing patterns with several texturing properties was investigated and the film thickness for these conditions was studied. With the numerical algorithm developed and taking cavitation into consideration, the effect of shape, depth, size, and texture pitch on the film thickness was studied. Full article
(This article belongs to the Special Issue Tribological Performance of Textured Surfaces)
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Graphical abstract

Open AccessArticle Effect of Surface Texturing Parameters on the Lubrication Characteristics of an Axial Piston Pump Valve Plate
Received: 30 March 2018 / Revised: 10 May 2018 / Accepted: 14 May 2018 / Published: 16 May 2018
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Abstract
In this article, a geometrical model of different microtextures is established for an axial piston pump valve plate. A finite differential method was used to solve the Reynolds equation for the oil film thickness and pressure, which were simulated under different microtextures. The
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In this article, a geometrical model of different microtextures is established for an axial piston pump valve plate. A finite differential method was used to solve the Reynolds equation for the oil film thickness and pressure, which were simulated under different microtextures. The influence of microtexture shape and structure on performance was studied and optimal parameters sought. Different convergence gaps are formed by different microtexture radii, and they produce different hydrodynamic effects. The lubrication characteristics of the valve plate are better when a microtexture is used and are influenced by the type of microtexture. We reached the following conclusions: (1) The lubrication characteristics of the valve plate are influenced by different microtexture parameters and can be improved by optimizing the microtexture parameters; (2) There is an optimal parameter combination when adding microtexture with three shapes (spherical, cylindrical and square) and the optimal dimensionless oil film pressure lubrication characteristics can be obtained; (3) The degree of improvement in the dimensionless oil film pressure lubrication characteristics was (listed from highest to lowest): micro-hemispherical texture > micro-cylindrical texture > micro-square texture. Full article
(This article belongs to the Special Issue Tribological Performance of Textured Surfaces)
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Graphical abstract

Open AccessArticle CFD Modeling of the Effect of Different Surface Texturing Geometries on the Frictional Behavior
Received: 5 December 2017 / Revised: 29 December 2017 / Accepted: 22 January 2018 / Published: 26 January 2018
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Abstract
In order to understand the effect of surface texturing parameters on the frictional behavior of textured surfaces and to correlate results of different lubrication regimes, Computational Fluid Dynamics (CFD) numerical analysis of the fluid flow was performed for four different textured surface geometries.
[...] Read more.
In order to understand the effect of surface texturing parameters on the frictional behavior of textured surfaces and to correlate results of different lubrication regimes, Computational Fluid Dynamics (CFD) numerical analysis of the fluid flow was performed for four different textured surface geometries. The aim of the present research paper is to get theoretical background for the frictional behavior of textured surfaces under hydrodynamic lubrication. Since it is unrealistic to make a direct analysis of a real problem that can possess more than several thousand micro-dimples, the purpose is then to investigate the flow in single cells of periodical micro-dimple patterns and to extract useful conclusions for the lubrication’s framework. Among all geometries studied, optimum geometry shapes in terms of hydrodynamic performance were reported. It was found that the best hydrodynamic performance was achieved with the rectangular geometry (lowest shear force). Full article
(This article belongs to the Special Issue Tribological Performance of Textured Surfaces)
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