Applied Tribology in Mechanical Engineering

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

Deadline for manuscript submissions: closed (15 July 2020) | Viewed by 12808

Special Issue Editors


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Guest Editor
Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Wroclaw, Poland
Interests: tribology; plastics; mechanical engineering

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Guest Editor
Department of Fundamentals of Machine Design and Mechatronic Systems, Wrocław University of Science and Technology, Ignacego Łukasiewicza 7/9, 50-371 Wrocław, Poland
Interests: rheology; tribology; surface engineering; biomedical engineering
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Special Issue Information

Dear Colleagues,

Since the earliest times, people have used friction, wear and lubrication to solve technical problems in everyday life. Despite the lack of detailed technical knowledge, many technical solutions related to tribology were created in the distant past, and tribology is still a fascinating and evolving field of research although centuries have passed since people first struggled with friction, wear and lubrication problems. To date, there have been many advances in the production of new materials, especially composite materials, whose task is to reduce losses associated with friction and wear of machine parts. This is also the goal of the new technologies related to improving the tribological properties of materials.

Currently, most machine components work in various friction conditions. Therefore, it is very important to consider the issue of materials used for sliding or rolling elements in machines, as well as lubricants. A number of research articles have already been published regarding the tribological properties of friction pairs under various operating conditions. It is particularly important to know the wear processes of machine parts. This is necessary to determine the criteria for diagnosing the technical condition of machines and the prediction of their lifetime. Increasing progress in modeling and computation using computer techniques allows a better simulation of tribological processes occurring during the friction of machine elements.

This Special Issue exclusively aims at the latest developments in the field of sliding materials and lubricants used in machines and devices. Equally interesting is the modeling of processes and phenomena related to friction, wear, and lubrication of machine elements with the use of computer techniques. Research articles dedicated to improvements in the lifetime of machines related to the tribological wear of their parts, as well as reducing the friction resistance, if necessary, will be of great interest to this Special Issue. Advances in modeling and the cross-correlation to experimental results in mechanical engineering applications are also highly welcome.

Prof. Dr. Wojciech Wieleba
Prof. Dr. Maciej Paszkowski
Guest Editors

Manuscript Submission Information

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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 monthly journal published by MDPI.

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Keywords

  • Friction in machines
  • Wear reduction
  • Diagnosing of wear
  • Modeling of wear
  • Modeling of friction
  • Lubrication systems

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Published Papers (3 papers)

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Research

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7 pages, 1716 KiB  
Communication
Comparative Tribological Properties of Pd-, Pt-, and Zr-Based Bulk Metallic Glasses
by Marco A. Medina, Ogulcan Acikgoz, Anthony Rodriguez, Chandra S. Meduri, Golden Kumar and Mehmet Z. Baykara
Lubricants 2020, 8(9), 85; https://doi.org/10.3390/lubricants8090085 - 21 Aug 2020
Cited by 7 | Viewed by 3863
Abstract
We present a comparative study of the tribological properties of Pd-, Pt-, and Zr-based bulk metallic glasses (BMG-Pd, BMG-Pt, and BMG-Zr, respectively) under unlubricated conditions. In particular, micro-tribometry is utilized with a 52,100 steel ball, showing that BMG-Pt exhibits a significantly higher coefficient [...] Read more.
We present a comparative study of the tribological properties of Pd-, Pt-, and Zr-based bulk metallic glasses (BMG-Pd, BMG-Pt, and BMG-Zr, respectively) under unlubricated conditions. In particular, micro-tribometry is utilized with a 52,100 steel ball, showing that BMG-Pt exhibits a significantly higher coefficient of friction (COF) (0.58 ± 0.08) when compared with BMG-Pd (0.30 ± 0.02) and BMG-Zr (0.20 ± 0.03). Topographical roughness on and off wear scars is characterized via atomic force microscopy (AFM), with results that do not correlate with the observed frictional behavior. On the other hand, scanning electron microscopy (SEM) is utilized to reveal contrasting wear mechanisms for the three samples: while BMG-Pd and BMG-Zr exhibit predominantly abrasive wear, there is evidence of adhesive wear on BMG-Pt. Consequently, the occurrence of adhesive wear emerges as a potential mechanism behind the observation of relatively high coefficients of friction on BMG-Pt, suggesting stronger interactions with steel when compared with the other BMG samples. Full article
(This article belongs to the Special Issue Applied Tribology in Mechanical Engineering)
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21 pages, 38511 KiB  
Article
Numerical Modeling of Wear in a Thrust Roller Bearing under Mixed Elastohydrodynamic Lubrication
by Andreas Winkler, Max Marian, Stephan Tremmel and Sandro Wartzack
Lubricants 2020, 8(5), 58; https://doi.org/10.3390/lubricants8050058 - 22 May 2020
Cited by 30 | Viewed by 5002
Abstract
Increasing efforts to reduce frictional losses and the associated use of low-viscosity lubricants lead to machine elements being operated under mixed lubrication. Consequently, wear effects are also gaining relevance. Appropriate numerical modeling and predicting wear in a reliable manner offers new possibilities for [...] Read more.
Increasing efforts to reduce frictional losses and the associated use of low-viscosity lubricants lead to machine elements being operated under mixed lubrication. Consequently, wear effects are also gaining relevance. Appropriate numerical modeling and predicting wear in a reliable manner offers new possibilities for identifying harmful operating conditions or for designing running-in procedures. However, most previous investigations focused on simplified model contacts and the wear behavior of application-oriented contacts is relatively underexplored. Therefore, the contribution of this paper was to provide a numerical procedure for studying the wear evolution in the mixed elastohydrodynamically lubricated (EHL) roller/raceway contact by coupling a finite element method (FEM)-based 3D EHL model with surface topography changes following a local Archard-type wear model, a Greenwood–Williamson-based load-sharing approach and the Sugimura surface adaption model. This study applied the operating conditions of an 81212 thrust roller bearing, considering realistic geometry and locally varying velocities. The calculated wear profiles in the raceway featured asymmetries, which were in good agreement with the experimental results reported in the literature and could be correlated with the velocity and slip distribution. In addition, the effects of speed, load and oil viscosity were investigated by means of four load cases and two lubricants, demonstrating the broad range of applying the numerical approach. Full article
(This article belongs to the Special Issue Applied Tribology in Mechanical Engineering)
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Review

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23 pages, 11983 KiB  
Review
Tribological Performance and Application of Antigorite as Lubrication Materials
by Zhimin Bai, Guijin Li, Fuyan Zhao and Helong Yu
Lubricants 2020, 8(10), 93; https://doi.org/10.3390/lubricants8100093 - 11 Oct 2020
Cited by 11 | Viewed by 3346
Abstract
Antigorite is a Mg-rich 1:1 trioctahedral-structured layered silicate mineral. In recent decades, many studies have been devoted to investigating the tribological performance and application of antigorite as lubrication materials. This article provides an overview of the mineralogy, thermal decomposition and surface modifications of [...] Read more.
Antigorite is a Mg-rich 1:1 trioctahedral-structured layered silicate mineral. In recent decades, many studies have been devoted to investigating the tribological performance and application of antigorite as lubrication materials. This article provides an overview of the mineralogy, thermal decomposition and surface modifications of antigorite powders, as well as the recent advancement that has been achieved in using antigorite to reduce friction and wear of friction pairs. The tribological performance of antigorite powders and its calcined product in different lubricating media, such as oil, grease and solid composites have been comprehensively reviewed. The physico-chemical characteristics of surface layers of the friction pairs are discussed. Applications and mechanisms of lubricity and anti-wear of antigorite are highlighted. Full article
(This article belongs to the Special Issue Applied Tribology in Mechanical Engineering)
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