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Advances in Sustainable Cooling/Lubrication Techniques for Improving the Tribological Characteristics...
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Advances in Sustainable Cooling/Lubrication Techniques for Improving the Tribological Characteristics and Machining Performance

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

Deadline for manuscript submissions: 1 July 2024 | Viewed by 4696

Special Issue Editors

Dr. Le Gong

E-Mail Website
Guest Editor
College of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China
Interests: advanced manufacturing; manufacturing processes; sustainable manufacturing; high performance machining; modeling and optimization; machinability of difficult-to-cut materials; cryogenic machining; surface integrity; machining simulation
Dr. Muhammad Jamil

E-Mail Website
Guest Editor
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Interests: high-performance machining; sustainability; lubricooling; cryogenic machining; energy efficiency
Special Issues, Collections and Topics in MDPI journals
Dr. Aqib Mashood Khan

E-Mail Website
Guest Editor
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Interests: energy modeling; life-cycle assessment; resource-based energy consumption; nanofluids; hybrid CryoMQL

Special Issue Information

Dear Colleagues,

We are pleased to announce the release of a new Special Issue, “Advances in Sustainable Cooling/Lubrication Techniques for Improving the Tribological Characterisitcs and Machining Performance”, in the journal Lubricants. In this Special Issue, both original research articles and reviews are welcome.

Recent environmental challenges are placing significant pressure on industries to save energy and apply sustainable cooling/lubrication. Therefore, sustainable cooling/lubrication is gaining increasing attention in modern manufacturing industries.

A coolant/lubricant with excellent lubrication could help to reduce energy consumption, friction and wear and improve machining performance, as well as providing a more sustainable environment. Although emulsion-based cooling/lubrication reduces wear and friction, it will inevitably cause environmental issues due to nonbiodegradable mineral oils and the toxicity of harmful additives. These nonbiodegradable mineral oils are the main cause of water pollution, soil pollution, and skin irritation issues. Although water is useful for cleaning, its corrosive nature and poor lubricity prevents it from being utilized in numerous applications. However, oil-on-water (OoW), cryogenic cooling (CO2, LN2), and minimum quantity lubrication (MQL) are eco-friendly alternatives to mineral-based emulsions. Cooling/lubrication systems are being modified from minimum quantity lubrication (MQL) to nanofluid MQL (NFMQL), hybrid CryoMQL, and hybrid nanofluids-assisted CryoMQL, etc. Moreover, the flow rate of the lubricant, the nozzle position, and lubricant properties also affect the performance of the cooling/lubrication system.   

The current Special Issue is dedicated to the latest developments in experimental and simulation research to advance cooling/lubrication technology in the areas of tribology, machining, and other emerging fields.

Dr. Le Gong
Dr. Muhammad Jamil
Dr. Aqib Mashood Khan
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 2600 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

  • cryogenic; MQL; NFMQL; hybrid cryoMQL
  • manufacturing processes (turning; milling; drilling; grinding; etc.)
  • machining of difficult-to-cut materials (titanium alloy; superalloy; stainless steel; high-strength steel; etc.)
  • machinability (cutting force; cutting temperature; tool wear, chip formation; chip morphology; etc.) and surface integrity (surface roughness; surface topography; surface defects; microstructural features; microhardness; work hardening; residual stresses; etc.)
  • friction and wear, friction-reducing properties, wear-reduction capability
  • tribological characterisitcs (friction coefficient; wear volume; wear morphology; wear scar; etc.), wettability, tribological model, lubrication mechanism
  • water-based nanolubricant, oil-based nanolubricants
  • finite element analysis, modelling and simulation, machining simulation
  • energy efficiency
  • material characterization

Published Papers (3 papers)

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Research

16 pages, 9424 KiB  
Article
Friction Performance of Self-Emulsifying Esters and Organic Phosphate Esters Mixed Aqueous Solution on the Surface of TB6 Titanium Alloy
by Lishun Luo, Liu He, Yahui Shi, Xiaolei Li and Guibin Tan
Lubricants 2023, 11(7), 276; https://doi.org/10.3390/lubricants11070276 - 26 Jun 2023
Viewed by 1111
Abstract
Water-based lubrication, due to the poor film-forming ability of water, faces challenges in achieving effective lubrication for titanium alloys. This study systematically investigates the frictional performance of phosphorus-based extreme pressure (EP) additives and self-emulsifying esters (SEE) on the surface of titanium alloy (TB6) [...] Read more.
Water-based lubrication, due to the poor film-forming ability of water, faces challenges in achieving effective lubrication for titanium alloys. This study systematically investigates the frictional performance of phosphorus-based extreme pressure (EP) additives and self-emulsifying esters (SEE) on the surface of titanium alloy (TB6) under different pressures and temperatures. The core lubricant consists of SEE with nonylphenol polyoxyethylene ether phosphate ester (NPEP), polyoxyethylene oleyl ether phosphate ester (POEP), and alcohol ether phosphate ester (AEP). Results show that SEE significantly improves the film-forming ability of the aqueous solution, while phosphate ester forms a strong chemical adsorption film on the alloy surface via P-O-Ti covalent bonds, enhancing the strength of the lubricating film. The combination of SEE and phosphate esters in the water-based solution enables effective lubrication for titanium alloys. Particularly, the mixture of POEP and SEE demonstrates excellent synergistic effects, making it an ideal blend for water-based cutting fluids for titanium alloys. This study elucidates the lubrication mechanisms and action ranges between different additives, providing important guidance for the development and promotion of water-based cutting fluids. Full article
(This article belongs to the Special Issue Advances in Sustainable Cooling/Lubrication Techniques for Improving the Tribological Characteristics and Machining Performance)
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17 pages, 7712 KiB  
Article
Experimental Investigation of Tribology-Related Topography Parameters of Hard-Turned and Ground 16MnCr5 Surfaces
by Viktor Molnar
Lubricants 2023, 11(6), 263; https://doi.org/10.3390/lubricants11060263 - 16 Jun 2023
Cited by 3 | Viewed by 939
Abstract
Several surface topography parameters are available for the quantification of tribological properties of machined surfaces. Although these parameters and their influences are widely studied, there are contradictory findings due to the nature of the topography parameters, i.e., the behavior of different materials and [...] Read more.
Several surface topography parameters are available for the quantification of tribological properties of machined surfaces. Although these parameters and their influences are widely studied, there are contradictory findings due to the nature of the topography parameters, i.e., the behavior of different materials and cutting tool interactions lead to relatively varying numerical results. A comprehensive study of these interactions can contribute to more exact industrial machining applications. In this study, tribology-related 3D topography parameters of hard-machined (hard-turned and ground) surfaces were analyzed. The machining experiments were carried out based on a detailed design of the experiment; the analyzed material was case-hardened low-carbon content steel, which is widely used for automotive, industrial components such as bearings or gears. From the topography data, response function, correlation, and relative deviation analyses were carried out for the analyzed topography parameters, and tribology maps were created to support the selection of optimal cutting parameter values. Full article
(This article belongs to the Special Issue Advances in Sustainable Cooling/Lubrication Techniques for Improving the Tribological Characteristics and Machining Performance)
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22 pages, 41774 KiB  
Article
Investigation on Machinability Characteristics of Inconel 718 Alloy in Cryogenic Machining Processes
by Le Gong, Yu Su, Yong Liu, Wei Zhao, Aqib Mashood Khan and Muhammad Jamil
Lubricants 2023, 11(2), 82; https://doi.org/10.3390/lubricants11020082 - 15 Feb 2023
Cited by 5 | Viewed by 1403
Abstract
In this innovative work, Inconel 718 alloy turning simulation models under dry and cryogenic machining (Cryo) conditions are developed. The machinability characteristics of the aforementioned alloy were assessed with relation to cutting temperature (Tct) and cutting force ( [...] Read more.
In this innovative work, Inconel 718 alloy turning simulation models under dry and cryogenic machining (Cryo) conditions are developed. The machinability characteristics of the aforementioned alloy were assessed with relation to cutting temperature (Tct) and cutting force (Fcf). The comparison of the Tct and Fcf results from simulation with those obtained under the identical experimental conditions served as additional evidence of the effectiveness of the suggested simulation model. By varying the cutting speed, the reduction in Tct under Cryo conditions was 9.36% to 11.98% compared to dry cutting. Regarding the force comparison under experiment and simulation, the average difference between the simulation and experimental values for the main cutting force (Fc) was 13.73%, whereas the average deviation for the feed force (Ff) was 14.63%. Response surface methodology (RSM) was employed to build the forecasting models for Tct and Fcf in cryogenic settings. These mathematical models showed excellent predictive performance and were able to estimate the Tct and Fcf under machining operations settings, according to the present research. When compared to dry cutting, Cryo reduced the cutting temperature, which had a positive impact on the alloy’s machinability. Full article
(This article belongs to the Special Issue Advances in Sustainable Cooling/Lubrication Techniques for Improving the Tribological Characteristics and Machining Performance)
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