Special Issue "Tribology for Lightweighting"

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

Deadline for manuscript submissions: 31 December 2022 | Viewed by 3915

Special Issue Editors

Dr. Montserrat Vilaseca
E-Mail Website
Guest Editor
Eurecat, Centre Tecnològic de Catalunya, Unit of Metallic and Ceramic Materials, Plaça de la Ciència 2, 08243 Manresa, Spain
Interests: lubricants; lightweight; metals; ceramics; coatings; tribology; wear; surface integrity
Dr. Leonardo Pelcastre
E-Mail Website
Guest Editor
Division of Machine Elements, Luleå University of Technology, Luleå, Sweden
Interests: high-temperature tribology; tribomaterials; solid lubricants; sheet metal forming; lightweight metals; additive manufacturing

Special Issue Information

Dear Colleagues,

Design in automotive applications constantly faces new challenges to meet the increasingly more stringent safety and environmental legislations. Lightweight solutions in vehicles have become one of the main goals in the automotive industry, not only for the reduction in fuel consumption in fuel-powered cars, but also for the enhancement of the battery range in electric vehicles. An adequate understanding of tribology contributes towards reducing the carbon footprint of energy-intensive automotive systems and related manufacturing processes mainly acting in the following:

- New lubricants and advanced materials for surface- and contact-demanding applications. Tribology advances enhance the performance and efficiency of moving parts in vehicles. Optimized lubricants, materials and surface conditions are of high interest for components involving gears, bearings, clutches and other mechanical contacts in transmissions or vehicle engines. Advances in lubrication are also relevant for e-mobility-related technologies, where lubricants play a major role in electrical compatibility, thermal management and material adaptability.

- Manufacturing processes of parts for vehicle lightweighting. Advanced materials such as advanced high-strength steels (AHSS) and novel high-strength aluminium grades are intensively used in vehicle lightweighting. New challenges in forming (cold and hot stamping, extrusion, casting, trimming, punching, etc.) to obtain lighter and stronger components have emerged, and as a result, new solutions in lubricants and surface technologies for tooling are needed in order to improve the efficiency of such manufacturing processes and to obtain high-quality components.

The emerging lightweighting solutions and tribological optimization are essential for decreasing emissions and the carbon footprint in automotive-related applications. Durability, friction control, wear protection and sustainability are interlinked. This Special Issue is aimed at the latest research on advanced lubricants for automotive parts subjected to harsh tribological requirements and for manufacturing processes of automotive components using advanced materials for lightweighting.

Dr. Montserrat Vilaseca
Dr. Leonardo Pelcastre
Guest Editors

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 submissions that pass pre-check are 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 monthly 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 1800 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

  • Lightweight
  • Automotive contacts
  • Vehicle efficiency
  • E-mobility
  • Advanced high strength steels
  • Aluminium
  • Tribology in manufacturing processes 
  • Novel lubricants
  • Surface integrity
  • Sustainability
  • Green tribology

Published Papers (5 papers)

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Research

Article
Super-Hard DLC Coatings as an Alternative to Polycrystalline Diamond for Cutting Tools: Predictive Analysis of Aluminium Alloy Surface Quality
Lubricants 2022, 10(7), 135; https://doi.org/10.3390/lubricants10070135 - 23 Jun 2022
Viewed by 235
Abstract
The use of lightweight materials, such as ultra-high-strength aluminium alloys, is in high demand in the automotive and aerospace industries where weight savings are critical. The tool materials used for high-speed cutting of these aluminium alloys are subjected to severe conditions that promote [...] Read more.
The use of lightweight materials, such as ultra-high-strength aluminium alloys, is in high demand in the automotive and aerospace industries where weight savings are critical. The tool materials used for high-speed cutting of these aluminium alloys are subjected to severe conditions that promote premature failure of cutting tools. The application of polycrystalline diamond (PCD) coatings provides cutting tools with increased mechanical and thermal fatigue resistance and improved tribological performance. Despite these good properties, their high cost remains a major limitation in this sector. Super-hard Diamond-Like Carbon (DLC) coatings offer a technologically and economically feasible alternative to PCD-coated tools for cutting and machining non-ferrous materials. In this paper, the machining performance of coated and un-coated hard metal inserts in the turning of 7075 aluminium alloy has been explored. The surface quality of machined parts, the cutting tool wear resistance and the vibrations generated during turning of un-coated, PCD and super-hard thin DLC coatings on tungsten carbide inserts were compared. The results obtained demonstrate that DLC coatings are a potentially interesting alternative to PCD coatings for machining ultra-high-strength aluminium alloys, where surface component finish is a key factor. Full article
(This article belongs to the Special Issue Tribology for Lightweighting)
Article
Interaction of Co3O4 Nanocube with Graphene and Reduced Graphene Oxide: Adhesion and Quantum Capacitance
Lubricants 2022, 10(5), 79; https://doi.org/10.3390/lubricants10050079 - 02 May 2022
Viewed by 551
Abstract
The composites on the base of Co3O4 and graphene are in demand in the field of portable, flexible energy storage devices due to their small size, lightweight, big specific capacitance, good cycle stability and appropriate capacitance retention. The synthesis of [...] Read more.
The composites on the base of Co3O4 and graphene are in demand in the field of portable, flexible energy storage devices due to their small size, lightweight, big specific capacitance, good cycle stability and appropriate capacitance retention. The synthesis of this material always starts from the treatment of graphene oxide, so as a result, experimenters receive Co3O4 nanocubes incorporated into reduced graphene oxide indicates the presence of different oxygen-containing groups in the compound. This fact may limit the advantages of the considered material. Our theoretical quantum chemical calculations show that the process of Co3O4 incorporation between reduced graphene oxide layers is more energetically favorable in comparison to pure graphene. However, the win in the quantum capacitance in the case of pure graphene is in the range of 300–500 F/g in dependence on the applied voltage. The obtained result may indicate the need for modification of the current methods of graphene/Co3O4 synthesis to improve its application in supercapacitors and lithium-ion batteries. Full article
(This article belongs to the Special Issue Tribology for Lightweighting)
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Article
Carbon Nanotori Reinforced Lubricants in Plastic Deformation Processes
Lubricants 2022, 10(5), 74; https://doi.org/10.3390/lubricants10050074 - 19 Apr 2022
Viewed by 741
Abstract
This research presents the effects of carbon nanotori structures (CNst) dispersed as reinforcement for metal-working and metal-forming lubricants. Synthetic (SL) and deep drawing (DD) nanolubricants were prepared following a two-step method at 0.01 wt.%, 0.05 wt.%, and 0.10 wt.% filler fractions. Slight increases [...] Read more.
This research presents the effects of carbon nanotori structures (CNst) dispersed as reinforcement for metal-working and metal-forming lubricants. Synthetic (SL) and deep drawing (DD) nanolubricants were prepared following a two-step method at 0.01 wt.%, 0.05 wt.%, and 0.10 wt.% filler fractions. Slight increases in viscosity (<6%) for nanolubricants were observed as filler fraction was increased through various measured temperatures. Tribological behavior of nanolubricants displayed superb improvements under antiwear and extreme pressure conditions. The load carrying capacity (poz) increased by 16% and 22% at merely 0.01 wt.% CNst reinforcement and up to 73% and 107% at 0.10 wt.% filler fraction for SL and DD nanolubricants, respectively, compared to conventional materials. Additionally, at 0.10 wt.% wear scar evaluations showed a highest benefit of 16% and 24%, for SL and DD nanolubricants, respectively. This enhancement is attributed to diverse mechanisms such as rolling/sliding and load bearing effects, tribofilm formation, and CNst tribosintering behavior (at high pressures) onto metallic surfaces due to nanostructures size and morphology and their interlayer relationship among conventional lubricants. Full article
(This article belongs to the Special Issue Tribology for Lightweighting)
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Article
Mechanical and Tribological Properties of Polytetrafluoroethylene Composites Modified by Carbon Fibers and Zeolite
Lubricants 2022, 10(1), 4; https://doi.org/10.3390/lubricants10010004 - 28 Dec 2021
Cited by 1 | Viewed by 679
Abstract
Currently, lightweight and high-strength polymer composites can provide weight savings in the automotive and process equipment industries by replacing metal parts. Polytetrafluoroethylene and polymer composites based on it are used in various tribological applications due to their excellent antifriction properties and thermal stability. [...] Read more.
Currently, lightweight and high-strength polymer composites can provide weight savings in the automotive and process equipment industries by replacing metal parts. Polytetrafluoroethylene and polymer composites based on it are used in various tribological applications due to their excellent antifriction properties and thermal stability. This article examines the effect of combined fillers (carbon fibers and zeolite) on the mechanical, tribological properties, and structure of polytetrafluoroethylene. It is shown that the introduction of combined fillers into polytetrafluoroethylene retains the tensile strength and elongation at break at a content of 1–5 wt.% of carbon fibers, the compressive stress increased by 53%, and the yield stress increased by 45% relative to the initial polymer. The wear resistance of polymer composites increased 810-fold compared to the initial polytetrafluoroethylene while maintaining a low coefficient of friction. The structural features of polymer composites are characterized by X-ray diffraction analysis, infrared spectroscopy, and scanning electron microscopy. Full article
(This article belongs to the Special Issue Tribology for Lightweighting)
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Article
Investigation of the Structural, Mechanical and Tribological Properties of Plasma Electrolytic Hardened Chromium-Nickel Steel
Lubricants 2021, 9(11), 108; https://doi.org/10.3390/lubricants9110108 - 04 Nov 2021
Viewed by 892
Abstract
This paper investigates how electrolytic plasma hardening (PEH) bears upon the changes in the phase structural and tribological properties of steel 0.34C-1Cr-1Ni-1Mo-Fe, which is widely used in manufacturing highly stressed gears. The samples of steel 0.34C-1Cr-1Ni-1Mo-Fe went through the PEH in an electrolyte [...] Read more.
This paper investigates how electrolytic plasma hardening (PEH) bears upon the changes in the phase structural and tribological properties of steel 0.34C-1Cr-1Ni-1Mo-Fe, which is widely used in manufacturing highly stressed gears. The samples of steel 0.34C-1Cr-1Ni-1Mo-Fe went through the PEH in an electrolyte containing an aqua solution of 20% calcined soda (Na2CO3) and 10% carbamide ((NH2)2CO). The initial steel 0.34C-1Cr-1Ni-1Mo-Fe is stated to have the following structural components: a lamellar pearlite with volume share of 35%, a ferrite-carbide mixture of ~45% and a fragmented ferrite of ~20%; after the PEH it contains lath-lamellar martensite, fine particles of cementite and M23C6 carbide. The durability of steel 0.34C-1Cr-1Ni-1Mo-Fe was found to rise by 3.4 times after the PEH and its microhardness increased in 2.6 times. The curve-tension of the crystal lattice was established to be like plastic (χ = χpl) and does not cause the formation of microcracks in the material. Full article
(This article belongs to the Special Issue Tribology for Lightweighting)
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