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Journal articles on the topic 'Friction reduction technologies'

Author: Grafiati

Published: 7 June 2025

Last updated: 16 July 2025

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1

Bakhshaliev, Seymur. "Advanced Friction Reduction Technologies suitable for Drilling Performance in Harsh Environments." International Journal of Novel Research and Development 9, no. 12 (2024): b143—b152. https://doi.org/10.5281/zenodo.14625788.

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Friction-related challenges incurred in harsh drilling environments, including extreme temperatures, high pressures, as well as challenging rock formations, are significant enough to reduce drilling performance, add to operating costs, and increase operating risks. Therefore, drilling efficiency and reliability under such conditions has been the focal point for friction reduction technologies. In particular, this study assesses the effectiveness of these friction reduction technologies (including advanced lubricants, optimized drill bit coatings, and innovative drilling fluid additives) in ena

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2

Teng, Yunnan, Jingyang Ma, and Liyang Xie. "A Survey of Research on Vibration Friction Reduction Technologies in Aero-Engines." Materials 18, no. 3 (2025): 535. https://doi.org/10.3390/ma18030535.

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The performance and reliability of an aviation engine, as a core component of an aircraft, is of paramount importance to flight safety. Scholars worldwide have contributed to the design and research of aviation engines, and these advancements and contributions embody the relentless efforts and innovative spirit of scholars and engineers in the field of aviation engine design research. In recent studies, researchers have proposed various vibration control methods to address friction issues in aviation engines, offering corresponding control strategies for the aspects of materials, lubrication,

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Guo, Yanbao, Min Zhang, Hui Yang, et al. "Friction Challenge in Hydraulic Fracturing." Lubricants 10, no. 2 (2022): 14. http://dx.doi.org/10.3390/lubricants10020014.

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Hydraulic fracturing has become one of the most popular techniques for exploring sustainable energy sources. However, friction is associated with the entire fracturing process, presenting significant challenges for development. Facing the huge friction challenges, this review is elaborated in the following three aspects: (1) the fundamentals of hydraulic fracturing, including three aspects of rock fracture mechanism, fracturing fluid, and proppant; (2) the friction challenges in hydraulic fracturing, which mainly exist in friction along the path and friction near wellbore; (3) hydraulic fractu

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4

Ilyinykh, V. A. "The effect of lubricants with mineral additives on friction in supports of spindle assemblies." Omsk Scientific Bulletin, no. 180 (2021): 11–15. http://dx.doi.org/10.25206/1813-8225-2021-180-11-15.

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Currently, the task of increasing the reliability and wear resistance of mechanisms and machines is being solved on the basis of the use of new composite materials. The most effective method of obtaining composite materials is the use of geological activators, which are introduced into the friction zone of the components of mechanisms and machines through a lubrication system, which allows increasing the micro-moisture of the friction surfaces up to 2,3 times, as well as reducing friction in sliding and rolling bearings. According to the research results, it is found that the use of repair and

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Ciulli, E. "A Review of Internal Combustion Engine Losses Part 1: Specific Studies on the Motion of Pistons, Valves and Bearings." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 206, no. 4 (1992): 223–36. http://dx.doi.org/10.1243/pime_proc_1992_206_183_02.

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Energy saving is an important task today. Friction reduction in reciprocating engines is a way to reduce fuel consumption and to improve engine endurance. To find the value of frictional losses of every component is necessary in order to reduce engine losses. The piston-liner system, valve train and bearings are the most important components for mechanical friction losses in reciprocating engines. In this paper both theoretical and experimental works published within the last ten years about the losses related to the motion of pistons, valves and bearings have been reviewed. Some known design

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Ancona, Antonio, Caterina Gaudiuso, Annalisa Volpe, Francesco Paolo Mezzapesa, Carmine Putignano, and Giuseppe Carbone. "Laser surface texturing for superhydrophobic, icephobic and friction reduction functionalization." IOP Conference Series: Materials Science and Engineering 1296, no. 1 (2023): 012042. http://dx.doi.org/10.1088/1757-899x/1296/1/012042.

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Abstract Nanometre and/or micrometer scale periodic features naturally present decorating the skin of many insects, fishes or plants have been found to give them extraordinary aesthetic, adhesion, antifouling, wear resistance, superhydrophobic or drag reduction properties. With the aim of artificially conveying the same properties to products and tools, researchers have tried to reproduce such bionic topography on the surface of a huge variety of materials using different manufacturing methods. Among the different manufacturing technologies, surface texturing based on direct laser writing usin

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Wang, Xing-Ming, and Xing-Miao Yao. "Vibration Technologies for Friction Reduction to Overcome Weight Transfer Challenge in Horizontal Wells Using a Multiscale Friction Model." Lubricants 6, no. 2 (2018): 53. http://dx.doi.org/10.3390/lubricants6020053.

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8

Gangopadhyay, Arup. "A Review of Automotive Engine Friction Reduction Opportunities Through Technologies Related to Tribology." Transactions of the Indian Institute of Metals 70, no. 2 (2016): 527–35. http://dx.doi.org/10.1007/s12666-016-1001-x.

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9

Ricco, Pierre, and Stanislav Hahn. "Turbulent drag reduction through rotating discs." Journal of Fluid Mechanics 722 (March 28, 2013): 267–90. http://dx.doi.org/10.1017/jfm.2013.92.

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AbstractAn active technique for friction drag reduction in a turbulent channel flow is studied by direct numerical simulations. The flow modification is induced by the steady rotation of rigid flush-mounted discs, located next to one another on the walls. The effect of the disc motion on the turbulent drag is investigated at a Reynolds number of ${R}_{\tau } = 180$, based on the friction velocity of the stationary-wall case and the half channel height. For a fixed maximum disc tip velocity, drag reduction can be achieved when the disc diameter is larger than a threshold, while below this thres

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10

Hassan, Masjuki, Syahir Amzar Zulkifli, Harith Hasnul, and Ashraf Yusoff. "Tribological advancement – strategies and effects towards emissions and global energy consumption." MATEC Web of Conferences 204 (2018): 00003. http://dx.doi.org/10.1051/matecconf/201820400003.

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This paper investigates the importance of tribology towards the global economy. The current world energy crisis, the depletion of fossil fuel reserves and the increasing of environmental hazards over the years have urged academicians and scientists to continuously seek for methods to overcome these problems while improving the quality of life in the same time. Energy saving can be achieved through the implementation of tribological improvements in various sectors such as transportation, manufacturing, power generation and residential sectors. The friction reductions eventually lead to wear red

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Marian, Max, Tim Weikert, and Stephan Tremmel. "On Friction Reduction by Surface Modifications in the TEHL Cam/Tappet-Contact-Experimental and Numerical Studies." Coatings 9, no. 12 (2019): 843. http://dx.doi.org/10.3390/coatings9120843.

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The overall energy efficiency of machine elements and engine components could be improved by using new technologies such as surface modifications. In the literature, surface engineering approaches like micro-texturing and the application of diamond-like carbon (DLC) coatings were frequently studied separately, with focus on a specific model contact and lubrication conditions. The contribution of the current study is to elucidate and compare the underlying friction reduction mechanisms of the aforementioned surface modifications in an application-orientated manner. The study applied the operati

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Orjuela Abril, Sofia, Marlen Del Socorro Fonseca-Vigoya, and Carlos Pardo García. "Study of the Cylinder Deactivation on Tribological Parameters and Emissions in an Internal Combustion Engine." Lubricants 10, no. 4 (2022): 60. http://dx.doi.org/10.3390/lubricants10040060.

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In the present investigation, a study is carried out using numerical simulation on the effects of cylinder deactivation on tribological parameters and emissions in an internal combustion engine. For the development of the research, a tribological model was used to predict the characteristics of the lubrication film, friction conditions, blow-by gas, and deformation of the piston rings. Additionally, the construction of a CFD model was carried out to describe the kinematic movement of the engine piston. The analysis of results allowed for the demonstration of the active cylinders presenting an

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13

Prasad, N. S., N. Ganesh, and A. Kumarasamy. "Technologies for High Power Density Diesel Engines." Defence Science Journal 67, no. 4 (2017): 370. http://dx.doi.org/10.14429/dsj.67.11537.

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<p class="p1">The engines used in armoured fighting vehicles have to be compact, light in weight, efficient and reliable. In order to achieve a compact engine design, a complete understanding of all the factors affecting the engine performance is needed. However, it is important to note that the performance of the engine cannot be compromised in the pursuit of compactness. The aim of this paper is to classify systematically various broad areas affecting the engine’s power to weight and power to volume ratio and discuss respective current technologies available. This paper explores the po

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Schrader, Tobias, Martin Weschta, Marion Merklein, Stephan Tremmel, Ulf Engel, and Sandro Wartzack. "Tribological Aspects in Manufacturing Processes of Microstructured Components and their Tribological Behavior in Operation." Advanced Materials Research 966-967 (June 2014): 323–35. http://dx.doi.org/10.4028/www.scientific.net/amr.966-967.323.

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An ever increasing mobility and a shortage of resources lead to restrictive politically driven limits for fuel consumption as well as an increasing demand of customers for efficient vehicles. Though electrification of cars proceeds, combustion engines will play an important role for conventional and hybrid concepts within next decades. Thus, for a contribution to increasing energy efficiency of vehicles it is vital to trace sources of friction losses and to identify possibilities for friction reduction in combustion engines. Therefore, the follower as a main contributor to friction losses in v

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15

Ackerson, Thomas N. "Game-Changing Technological Advancements for Next-Gen Space Exploration." AM&P Technical Articles 182, no. 2 (2024): 12–16. http://dx.doi.org/10.31399/asm.amp.2024-02.p012.

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Abstract Several key materials processes and techniques positively impact weight reduction and reusability of parts designed for travel to the moon, Mars, and beyond. This article addresses how advances in technologies such as additive manufacturing, friction stir welding, and surface analysis, can help further enhance design and fabrication of space systems.

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16

Khuyen, Nguyen Quang, Rudolf Kiefer, Fred Elhi, Gholamreza Anbarjafari, Jose G. Martinez, and Tarmo Tamm. "A Biomimetic Approach to Increasing Soft Actuator Performance by Friction Reduction." Polymers 12, no. 5 (2020): 1120. http://dx.doi.org/10.3390/polym12051120.

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While increasing power output is the most straight-forward solution for faster and stronger motion in technology, sports, or elsewhere, efficiency is what separates the best from the rest. In nature, where the possibilities of power increase are limited, efficiency of motion is particularly important; the same principle can be applied to the emerging biomimetic and bio-interacting technologies. In this work, by applying hints from nature, we consider possible approaches of increasing the efficiency of motion through liquid medium of bilayer ionic electroactive polymer actuations, focusing on t

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17

Wong, Victor W., and Simon C. Tung. "Overview of automotive engine friction and reduction trends–Effects of surface, material, and lubricant-additive technologies." Friction 4, no. 1 (2016): 1–28. http://dx.doi.org/10.1007/s40544-016-0107-9.

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18

LUO, YUEHAO, DEYUAN ZHANG, and YUEFEI LIU. "RECENT DRAG REDUCTION DEVELOPMENTS DERIVED FROM DIFFERENT BIOLOGICAL FUNCTIONAL SURFACES: A REVIEW." Journal of Mechanics in Medicine and Biology 16, no. 02 (2016): 1630001. http://dx.doi.org/10.1142/s0219519416300015.

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Reducing energy consumption and protecting the environment has always been becoming the pursing goal and object for mankind, especially in the past several decades. Our living environment is all surrounded by the fluids, and the friction in turbulence has progressively developed into the important proportion of energy consumption. Therefore, how to realize the drag reduction in turbulence has turned into the imperative issue to be resolved, and many scholars have made great contributions in the field with achieving so many profits. In this paper, three different typical biological functional s

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19

Petrushin, A. D., O. L. Ignat’Ev, and D. V. Glazunov. "Device for lubrication of open friction units." Vestnik of the Railway Research Institute 76, no. 6 (2017): 348–53. http://dx.doi.org/10.21780/2223-9731-2017-76-6-348-353.

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The article considers the problem of increased wear of the wheel-rail pair. An effective solution to this problem is the use of technical means of lubrication, which ensure a reduction in the wear rate of the crests of rolling stock wheels. Based on the survey of modern foreign and domestic lubrication devices and technologies, the main types of flange lubrication systems are identified: onboard (on rolling stock), track stationary, mobile rail-lubricators. The main shortcomings of the existing lubrication systems have been identified: the complexity of the construction of flange lubrication s

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20

Thibodeaux, Garrett M., Nicholas A. Baudoin, and William M. Chirdon. "Proteinaceous Spirulina Biomass as a Sustainable Drilling Fluid Additive for Lubricity." Lubricants 13, no. 4 (2025): 149. https://doi.org/10.3390/lubricants13040149.

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This study investigates the potential of Spirulina biomass as a lubricating additive for drilling fluid formulations. In this work, this waste protein is evaluated as a lubricant alternative that may decrease the coefficient of friction while improving the rheological profiles and/or reducing fluid loss via permeation in drilling fluids. A processed and dried Arthrospira platensis (Spirulina) biomass is incorporated into drilling fluid formulations and compared to standard lubricant additives for the drilling fluid properties of lubricity, rheology, and fluid loss. Rheological characterization

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21

Chen, Xiaolan, Feilong Zheng, Wenbing Gan, and Shixiong Xing. "Exploration and Research on Key Technologies for Improving the Response Speed of Servo-Hydraulic Cylinders." Applied Sciences 12, no. 9 (2022): 4162. http://dx.doi.org/10.3390/app12094162.

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The operating efficiency of the hydraulic system depends on the response speed and driving efficiency of the hydraulic components. Seeking various methods and technologies to improve performance and work efficiency is an important work for many scholars. In this paper, the development and performance improvement of four generations of hydraulic cylinders are analyzed to obtain the development of the drag reduction technology by examples such as sealing methods, microtextured hydrodynamic lubrication, manufacturing materials, drive methods, control methods, etc. The reviewed results show that t

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22

Суслов, Анатолий, Anatoliy Suslov, Михаил Шалыгин, and Mikhail Shalygin. "High technology of wear-resistance increase in friction surfaces of machinery operating in hydrogen environment." Science intensive technologies in mechanical engineering 2, no. 2 (2017): 19–24. http://dx.doi.org/10.12737/24547.

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In the paper there is considered a problem of wear-resistance increase in parts operating in hydrogen environment. The dependence of friction surface wear taking into account their sub-roughness and hydrogen existence is shown. A technology for a friction couple wear-resistance increase is offered including surface layer granularity decrease, the reduction of hydrogen content in an inter-grain space and the introduction in the structure of parts surface layers the elements allowing filling up an inter-grain space. The results of comparative wear tests for different technologies for wear-resist

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23

Loghmanova, S. B. "Up-to-date technologies of obtaining high-quality oils for automobile vehicles." Azerbaijan Oil Industry, no. 11 (November 15, 2022): 43–46. http://dx.doi.org/10.37474/0365-8554/2022-11-43-46.

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The production of high-quality engine oils using the base oils of II and III groups is carried out according to API classification and foreign pocket of additives. III+ group oils of Shell are produced on Shell Pure Plus technology. These are ecological, innovative, and completely synthetic Shell Helix Ultra (5W-40), Shell 0W-20 oils enabling the reduction of fuel consumption and friction factor as well. The paper presents the major stages of obtaining oils according to the Shell Pure Plus (GTL – gas to liquid) technology. It is shown that the base oils of III group with a viscosity index 170

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24

Strohonov, D., Y. Illyashenko, O. Voytenko, et al. "EQUIPMENT FOR PLASMA-ARC AND HYBRID WELDING, 3D PRINTING AND COATING TECHNOLOGIES." Sciences of Europe, no. 112 (March 8, 2023): 56–62. https://doi.org/10.5281/zenodo.7708524.

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At the stage of post-war reconstruction of Ukraine, the task of creating new technologies and equipment that meet the challenges of modern production arises. For this, research and industrial prototypes of new technological equipment are proposed, which allows for the industrial implementation of innovative high-tech processes of hybrid laser-plasma welding, 3D printing by additive microplasma deposition and coating by plasma-arc spraying of the anode wire. Technological studies of these processes have been carried out. It has been established that their use will contribute to the creation of

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25

Curran, Sarah A., and J. Martin Carlson. "The mechanism of soft tissue damage: It is all in the rub." Prosthetics and Orthotics International 39, no. 1 (2015): 82–84. http://dx.doi.org/10.1177/0309364614565574.

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Understanding mechanisms of injury to the skin and soft tissue are an important feature in optimizing management strategies. As technology advances and innovative wound products evolve, the need for the awareness of such developments is key to enhancing knowledge and their clinical application. This article provides an overview of the role of repetitive loading of the skin and tissues and the influence of thickness and mobility of these structures. The role of friction and pressure strategies is also discussed along with a brief overview of new products. Clinical relevance Pressure and frictio

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26

Saito, Yoshinori. "Mechanism of Tire / Road Noise Emission and Reduction Technology." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 268, no. 8 (2023): 502–10. http://dx.doi.org/10.3397/in_2023_0087.

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The significant noise reduction has been brought by recent electrification of power train of vehicles. More concern about impact on the health due to the environmental noise, especially road traffic noise, requires further reduction of tire / road noise emission caused by the contact between the tire and road surface. The tire / road noise emission mechanism can be described by three different systems such as the excitation, the response, and the propagation. The excitation is composed of the road excitation, the tread excitation, the air-pumping and the friction. The tire structural response

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27

KAŁUŻNY, Jarosław, Jerzy MERKISZ, Aleksander STEPANENKO, et al. "Piston assembly in the most powerful 2.0l diesel engine – case study of the current tribological system and innovative concepts for the future." Combustion Engines 171, no. 4 (2017): 127–33. http://dx.doi.org/10.19206/ce2017-421.

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This article is a contribution to the ongoing debate on the scenario of the vehicle powertrains development. The directions of the internal combustion engines development in search of the possibility of effective economic and ecological indicators improvement have been indicated. It has been pointed out that this goal can be achieved through the use of nanotechnology in order to exceed the downsizing barriers resulting from the permissible mechanical loads for conventional materials. The article presents the study of the construction and materials used in the piston assembly of the most advanc

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28

Allakhverdiyev, Z. S., and L. A. Kazimova. "Technologies for producing environmentally safety oil additives." E3S Web of Conferences 411 (2023): 02011. http://dx.doi.org/10.1051/e3sconf/202341102011.

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In the article we predetermined compounds to improve the quality of oils used in machines and mechanisms, as well as these compounds are environmentally safety. Thioamides due to their reactivity and chemical properties find wide applicability in chemical industry, engineering and agriculture. But these compounds are very less studied as additives used to improve the quality of oils used in machines and mechanisms. For this purpose, research work has been carried out to study the enhancement of anti-corrosion and anti-wear properties of additives in lubricating oils involving n-chlorophenyl th

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29

Aydinyan, S. V., H. V. Kirakosyan, M. K. Zakaryan, et al. "Fabrication of Cu-W Nanocomposites by Integration of Self-Propagating High-Temperature Synthesis and Hot Explosive Consolidation Technologies." Eurasian Chemico-Technological Journal, no. 4 (December 28, 2018): 301. http://dx.doi.org/10.18321/ectj763.

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Manufacturing W-Cu composite nanopowders was performed via joint reduction of CuO and WO3 oxides with various ratios (W:Cu = 2:1, 1:1, 1:3, 1:13.5) using combined Mg–C reducer. Combustion synthesis was used to synthesize homogeneous composite powders of W-Cu and hot explosive consolidation (HEC) technique was utilized to fabricate dense compacts from ultrafine structured W-Cu powders. Compact samples obtained from nanometer sized SHS powders demonstrated weak relation between the susceptibility and the applied magnetic field in comparison with the W and Cu containing micrometer grain size of m

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30

Zhou, Xiao Min, and Xiao Xu Cheng. "The Analysis of Influence on the Edge Drop of Tandem Cold Rolling Mill." Applied Mechanics and Materials 548-549 (April 2014): 363–66. http://dx.doi.org/10.4028/www.scientific.net/amm.548-549.363.

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Edge-drop control enlarges the shape control theories and technologies. But compared to the profile and flatness control technology, the edge drop control is a developing topic. This paper analyze the influence of strip thickness, strip width, reduction ratio, friction coefficient and deformation resistance on the edge drop based on the elastic deformation of rolls and the three-dimensional plastic deformation of strip for UCMW cold rolling mill. The results will support the further research on the edge drop control for cold rolling mill.

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31

Chang, Yuh Ping, Richard Lin, Hsiang Yu Wang, Li Ming Chu, and Te Chuan Ho. "An Experimental Study on Friction and Wear of Polyethylene with Rice-Husk." Key Engineering Materials 739 (June 2017): 202–10. http://dx.doi.org/10.4028/www.scientific.net/kem.739.202.

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As global policy has devoted much effort to promoting energy conservation and carbon reduction over the past few decades, low energy consumption and less pollution have become the future trends. Moreover, with natural resources gradually turning deficient gradually, it is very important for Taiwan to further establish key technologies from reprocessed natural resources as soon as possible. The special geographical features of East Asia have always displayed a large amount of rice husk, and therefore this paper investigates the green technology of thermoplastic polymerization with rice husk. Th

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Lewandowski, Bogusz. "Influence of Friction Forces and Gravity on the Quality of Movement in the MWR Rehabilitation Supporting Device." Applied Sciences 15, no. 10 (2025): 5409. https://doi.org/10.3390/app15105409.

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Recovering from upper limb injuries is very important because having limited functionality affects everyday tasks. Rehabilitation supporting systems significantly impact the results; however, it is important to ensure that they are safe and accurate. This study addressed friction forces and gravity on the movement quality of a mechatronic rehabilitation device (MWR) for the upper limb. At first, an experimental analysis was conducted to quantify the active torque required to maintain specific angular positions. The results revealed the significant impact of the mass of mechanical components an

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Кулаков, В. В., Д. С. Шмелев, А. Н. Иванова та А. К. Голубков. "Особенности конструирования углерод-углеродных композитов фрикционного назначения, изготовленных аэродинамическим методом, на основе дискретных волокон". Механика композиционных материалов и конструкций 27, № 2 (2021): 261–71. http://dx.doi.org/10.33113/mkmk.ras.2021.27.02.261_271.07.

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The designing of carbon-carbon composites (СCС) for friction use is an important problem, since the existing approaches are applicable only to technologies for obtaining materials using continuous fiber in the form of tapes and fabrics and are not suitable for products with chaotic reinforcement by short fibers, the use of which improves the mechanical characteristics of ССС both under static and dynamic influences. Also, this technology has economic advantages due to the use of cheaper raw materials and a significant reduction in the time of the molding stage in the presence of comparable phy

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Zhang, Dr Maria, and Olivia P. Kurek. "COATING MATERIALS FOR AUTOMOTIVE PISTON RINGS: A REVIEW OF TRIBOLOGICAL PERFORMANCE AND ENGINE IMPACT." International Journal of Research in Engineering 2, no. 3 (2022): 1–6. https://doi.org/10.55640/ijre-02-03-01.

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The tribological performance of automotive piston rings is pivotal for ensuring the longevity and efficiency of internal combustion engines. This review delves into the advancements in coating technologies applied to automotive piston rings, focusing on their impact on wear resistance, friction reduction, and overall engine performance. Various coating materials, including chromium-based, diamond-like carbon (DLC), nitriding, and thermal barrier coatings, are analyzed based on their tribological properties. Additionally, the challenges and future directions for the development of coatings that

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Sandu, Constantin, Thomas Humbert, Yves Auregan, et al. "Innovative liner concept using friction powder for increasing of broadband noise absorption. Applications for broadband noise absorption in fan duct." IOP Conference Series: Materials Science and Engineering 1226, no. 1 (2022): 012049. http://dx.doi.org/10.1088/1757-899x/1226/1/012049.

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Abstract This paper presents research related influence of friction powders on enlarging the absorption band of acoustic liners used for reduction of tonal noise in fan duct of aero-engine. Kundt tube measurements done at COMOTI using fine powders (granules) made of various light-weight materials placed in the honeycomb cells of SDOF liners have shown a considerable broadening of the absorbed band of frequencies without a significant decreasing of absorption at the resonance frequency. Although the phenomenon is generally present for any type of powder, it was observed that for some powders th

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Bhowmick, Sukanta, Faiz Muhaffel, Shayan Shirzadian, Huseyin Cimenoglu, and Ahmet T. Alpas. "Tribological Performance of a Plasma Electrolytic Oxidation-Coated Mg Alloy in Graphene-Incorporated Ethanol." Lubricants 12, no. 1 (2023): 9. http://dx.doi.org/10.3390/lubricants12010009.

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This study investigated the friction and wear characteristics of a plasma electrolytic oxidation (PEO)-coated Mg–Al alloy (AZ31) in sliding contact against steel using graphene nanoplatelets (GNPs) containing ethanol as a lubricant. The results revealed that the typically high coefficient of friction (COF) of PEO-coated surfaces under dry sliding (0.74) was notably reduced to 0.18 during the sliding tests conducted in GNP-free ethanol. When the ethanol contained 5 × 10−4 wt.% GNPs, the COF of the uncoated AZ31 alloy further dropped to 0.17. The PEO-coated surfaces achieved a significantly lowe

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Żywica, Grzegorz, Paweł Bagiński, Jakub Roemer, Paweł Zdziebko, Adam Martowicz, and Tomasz Zygmunt Kaczmarczyk. "Experimental Characterization of a Foil Journal Bearing Structure with an Anti-Friction Polymer Coating." Coatings 12, no. 9 (2022): 1252. http://dx.doi.org/10.3390/coatings12091252.

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The development of highly efficient and environmentally friendly machines requires the use of new technologies that are created using innovative design solutions and new materials. This also applies to various types of propulsion units, such as gas microturbines or combustion engines. Although these machines have been known for many years, by using new components, it is still possible to improve their performance. This article presents an experimental study conducted on a gas foil bearing using a polymer coating as an anti-friction material. These types of bearings allow for a reduction in fri

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MIZUNO, Hideaki. "Nissan gasoline engine strategy for higher thermal efficiency." Combustion Engines 169, no. 2 (2017): 141–45. http://dx.doi.org/10.19206/ce-2017-225.

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Rising highly concern about the environment has led to demands for the improvement of the efficiency of gasoline engines. Engine thermal efficiency will reach about 40% by technologies as boosted EGR, miller cycle and so on. This evolution trend will be continuously required to survive engines for the future. In this background, further improvement based on theoretical thermal efficiency of high compression ratio and specific heat capacity should be promoted. In addition, energy loss reduction such as represented by cooling loss and friction is also very important for the efficient and effecti

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Meng, Zhenpeng, Jianwei Liu, and Binhao Wang. "Forming Performance of Multi-way Tubes in Hydroforming." Journal of Physics: Conference Series 2587, no. 1 (2023): 012011. http://dx.doi.org/10.1088/1742-6596/2587/1/012011.

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Abstract The tube hydroforming technology is a rapid-forming technique in multi-way tube integrated and lightweight manufacturing. The forming performance of the multi-way tube under this technology was comprehensively analyzed and summarized in this paper. Firstly, the influencing factors, such as axial feed loading path and internal pressure, forming friction, and die transition fillet, in the process of multi-way tube forming were analyzed and summarized. Secondly, the optimization method of the multi-way tube forming performance in hydroforming was analyzed. Finally, the reduction of hydra

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Liu, Weipeng, Wenchao Wu, Muhammad Chhattal, et al. "Superlubricity of Titanium Alloy Enabled by MoS2 Flakes and a-C:H Film." Coatings 13, no. 5 (2023): 820. http://dx.doi.org/10.3390/coatings13050820.

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Titanium alloys are often used in engineering fields including aerospace, cryogenic technologies, and weaponry due to their remarkable qualities. However, several issues including a high coefficient of friction, weak wear resistance, and low hardness hinder their widespread usage. Despite several efforts to enhance their tribology, achieving ultra-low friction on titanium alloy surfaces remains a challenging problem in materials science. Here, we report on the superlubricity of a MoS2 + a-C:H (Mo-a films) composite film, prepared by magnetron sputtering and spraying to lubricate titanium alloy

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Kolesnikov, I., P. Koropets, and V. Avilov. "Introduction of innovative technologies in friction units of heavy-duty tribosystems and monitoring of their condition." Journal of Physics: Conference Series 2131, no. 5 (2021): 052034. http://dx.doi.org/10.1088/1742-6596/2131/5/052034.

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Abstract The article describes studies of heavy-duty metal-polymer tribosystems: wheel-brake pad and pyatnik-podpyatnik of rolling stock, as well as spline couplings of the MI-26 helicopter tail rotor transmission. Tests of the wheel - brake pad system were carried out on an inertial stand with two-way braking at loads and speeds close to real operating conditions. Methods for modifying polymers, fillers, and nanoscale additives have been developed for the Pyatnik - podpyatnik tribosystem of rolling stock. To increase the wear resistance of work surfaces two-layer carbon fibers were applied to

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Rastegaev, Igor, Dmitry Merson, Inna Rastegaeva, and Alexei Vinogradov. "A Time-Frequency Based Approach for Acoustic Emission Assessment of Sliding Wear." Lubricants 8, no. 5 (2020): 52. http://dx.doi.org/10.3390/lubricants8050052.

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The acoustic emission method is one of few contemporary non-destructive testing techniques enabling continuous on-line health monitoring and control of tribological systems. However, the existence of multiple “pseudo”-acoustic emission (AE) and noise sources during friction, and their random occurrence poses serious challenges for researchers and practitioners when extracting “useful” information from the upcoming AE signal. These challenges and numerous uncertainties in signal classification prevent the unequivocal interpretation of results and hinder wider uptake of the AE technique despite

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Urbas, Raša, Marina Vukoje, and Tomislav Cigula. "Engineering Tomorrow: Optimised Materials and Surfaces for Additive Manufacturing." Applied Sciences 15, no. 1 (2024): 213. https://doi.org/10.3390/app15010213.

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Focusing on advancements in additive manufacturing, this Special Issue explores the role of novel materials and surface technologies in improving functionality, performance, and sustainability. The research papers highlight innovative approaches to understanding and overcoming material limitations, particularly in the areas of surface engineering, process optimisation, and multi-material applications. Key topics include the tribological behaviour, wear resistance, and surface quality of coated components, the effects of process parameters on mechanical strength and surface roughness, and advan

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Nоvikоv, Fеdir Vаsilivyth, and Vladimir Ivanovich Polyansky. "THEORETICAL AND EXPERIMENTAL JUSTIFICATION OF EFFECTIVE TECHNOLOGIES OF HIGH-SPEED MECHANICAL PROCESSING." Bulletin of the National technical university "Kharkiv Polytechnic Institute" Series: Techniques in a machine industry, no. 1(7) (September 20, 2023): 65–73. http://dx.doi.org/10.20998/2079-004x.2023.1(7).08.

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A refined mathematical model for determining the conditional cutting stress during blade processing has been developed based on the establishment of an analytical dependence for determining the conditional shear angle of the processed material. It is shown that its formation is dominated by the radial component of the cutting force, which leads to its significant decrease (by 1.5 times) compared to the calculated values obtained according to known similar relationships. This made it possible to clarify the calculation of the parameters of mechanical processing power and thermal stresses and su

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Mertin, Chris, Andreas Naumov, Linda Mosecker, Markus Bambach, and Gerhard Hirt. "Influence of the Process Temperature on the Properties of Friction Stir Welded Blanks Made of Mild Steel and Aluminum." Key Engineering Materials 611-612 (May 2014): 1429–36. http://dx.doi.org/10.4028/www.scientific.net/kem.611-612.1429.

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Hybrid components made of steel and aluminum sheet metal are a promising approach for weight reduction for automotive applications. However, lightweight components made of steel and aluminum require suitable joining technologies, particularly if forming operations follow after the welding process. Friction Stir Welding (FSW) is a promising solid-state welding technology for producing dissimilar joints of steel and aluminum. Within this work dissimilar butt joints were produced using sheet metals of mild steel DC04 and the aluminum alloy AA6016 with a thickness of about 1 mm. The FSW joints sho

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Tian, Haoliang, Changliang Wang, Mengqiu Guo, Yongjing Cui, Junguo Gao, and Zhihui Tang. "Microstructures and high-temperature self-lubricating wear-resistance mechanisms of graphene-modified WC-12Co coatings." Friction 9, no. 2 (2020): 315–31. http://dx.doi.org/10.1007/s40544-019-0346-7.

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AbstractTo reduce the friction coefficient of cobalt-cemented tungsten carbide (WC-12Co) wear-resistant coatings, graphene was compounded into WC-12Co powder via wet ball milling and spray granulation. Self-lubricating and wear-resistant graphene coatings were prepared via detonation gun spraying. The presence, morphologies, and phase compositions of graphene in the powders and coatings that are obtained through different powder preparation processes were analyzed. The analysis was performed using the following technologies: energy-dispersive X-ray-spectroscopy (EDXS), scanning electron micros

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Wang, Xingming, Ping Chen, Wanzhi Huang, and Jiayan Zou. "Development of torque clutch drilling tool and evaluation of drag reduction performance." Advances in Mechanical Engineering 10, no. 10 (2018): 168781401880665. http://dx.doi.org/10.1177/1687814018806655.

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Horizontal well is one of the important methods of unconventional oil and gas resource development. As increasing length of horizontal section, there is a serious problem that axial force cannot transfer to bit. The drilling field needs a low-friction and low-cost drag reduction tool. This article summarized existing technologies of drag reduction in the horizontal and inclined well and proposes an integrated design of torque clutch. Detailed design of tool sub-systems is introduced. The tool includes three sub-systems: clutch, hydraulic system, and monitoring system. The clutch is consisted o

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Adetunla, Adedotun, Sunday Afolalu, Tien-Chien Jen, and Ayodele Ogundana. "The Advances of Tribology in Materials and Energy Conservation and Engineering Innovation." E3S Web of Conferences 391 (2023): 01014. http://dx.doi.org/10.1051/e3sconf/202339101014.

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Tribology has been significantly contributing to materials, energy conservation and engineering innovation. This paper elaborates the development of tribology considering in detail in energy factor, tribological role of efficiency in the society by introducing lubricants which reduces the effective friction while moving the mass which significantly improves overall efficiency of the process all though it was primitive. The objectives of the study of The American Society of Mechanical Engineers (ASME) are working to expand energy conservation, particularly through tribology, by doing things lik

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Aslan, Fadik, Laurent Langlois, Philippe Mangin, and Tudor Balan. "Identification of Drilling Parameters during the Flow Drill Screw Driving Process." Key Engineering Materials 767 (April 2018): 465–71. http://dx.doi.org/10.4028/www.scientific.net/kem.767.465.

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The automobile manufacturing industry, until recent years, has been using steel for car body components and the main method for joining these components has always been Resistance Spot Welding. However, since the global trends toward CO2 reduction and resource efficiency have significantly increased, the importance and usage of lightweight materials has enhanced as well. New lightweight materials such as aluminum and magnesium alloys, carbon-fiber-reinforced plastics, etc., have become a reality, thanks to the new fastening technologies. Flow drill screw driving (FDS) is a one–sided thermomech

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Cui, Youzheng, Dongyang Wang, Minli Zheng, et al. "Study on Cutting Performance and Wear Resistance of Biomimetic Micro-Textured Composite Cutting Tools." Metals 15, no. 7 (2025): 697. https://doi.org/10.3390/met15070697.

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During the dry machining of 6061 aluminum alloy, cemented carbide tools often suffer from severe wear and built-up edge (BUE) formation, which significantly shortens tool life. Inspired by the non-smooth surface structure of dung beetles, this study proposes an elliptical dimple–groove composite bionic micro-texture, applied to the rake face of cemented carbide tools to enhance their cutting performance. Four types of tools with different surface textures were designed: non-textured (NT), single-groove texture (PT), circular dimple–groove composite texture (AKGC), and elliptical dimple–groove

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