Article
Materials Science, Coatings & Films
Deniz Gultekin, Erhan Duru, Hatem Akbulut
Summary: Ni-B and Ni-B/CeO2 coatings were deposited using electroless deposition method, with CeO2 particle concentration of 10 g/l found to provide noticeable enhancement in hardness and wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Bhaskaranand Bhatt, Navnath Kalel, Ashish Darpe, Jayashree Bijwe
Summary: Copper is important in non-asbestos organic brake friction materials, but efforts to find a substitute have been made due to its potential threat to aquatic life. Promaxon-D shows potential to enhance the performance of copper-free brake pads, but its impact on the tribo-performance needs further investigation.
Article
Engineering, Mechanical
Leonardo I. Farfan-Cabrera, Julio A. Cao-Romero-Gallegos, Seungjoo Lee, Merve Uysal Komurlu, Ali Erdemir
Summary: Most moving components and lubricants in the automotive industry are being reengineered to meet the harsher conditions of electric vehicles (EVs). Diamond-like carbon (DLC) coatings have been widely used in this field due to their lower friction and wear coefficients, chemical inertness, corrosion resistance, and hardness. However, their performance under electrified sliding conditions of EVs has not been evaluated.
Review
Materials Science, Multidisciplinary
Hua-Fang Li, Jin-Yan Huang, Gui-Cai Lin, Peng-Yu Wang
Summary: Biomedical metallic materials are commonly used in repairing and replacing human tissues, but the wear and tear of implants in the human body could lead to osteolysis and inflammation, affecting both the longevity of the implants and human health. Therefore, studying the frictional and wear properties of these materials is essential for further research and improvement in this field.
Article
Multidisciplinary Sciences
Risheng Long, Chao Zhao, Yimin Zhang, Yibing Wang, Yueyong Wang
Summary: The study reveals the significant influence of the symmetry of vein-bionic textures and the number of secondary veins on the friction and wear properties of vein-bionic textured CRTBs under starved lubrication. Compared to the smooth group, the COFs and mass losses of vein-bionic textured bearings are all reduced. Among all groups, the tribological performance of bearings inspired by Ash is the best, with a wear loss reduced by 16.23% and a COF reduced by 15.79%.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Ceramics
Can Wu, Zheng Liu, Huijun Zhao, Haining Yang, Xinglin Li, Jing Ni
Summary: Si3N4 hybrid bearings, due to their electrical insulation, high speed, low friction coefficient, and wear resistance characteristics, are considered the most promising motor bearings for electric vehicles. However, the tribological mechanism between the ceramic-grease-steel complex interface is not clear. Three kinds of greases, namely lithium, polyurea, and calcium sulfonate complex grease, were synthesized from poly alpha olefin 40 as base oil. The effects of grease thickener morphology on the tribological properties of Si3N4/GCr15 contact surfaces at different slip speeds were investigated, and the vibration and friction torque performances in 6204 hybrid ceramic balls were evaluated. The results showed that the thickener could form physical deposition film and friction film to protect the worn surface at low speed. The friction and wear conditions were significantly improved at high speed under lithium grease and polyurea grease lubrication, being a mixed lubrication state. In presence of lithium grease, the tribological performance of the Si3N4/GCr15 interface and the vibration performance, impacted condition, starting torque, and friction torque of the hybrid ceramic ball bearings were all the best. Because lithium grease is subjected to continuous shear of the ceramic ball, which releases the base oil stably, and forms a thick oil film with the broken thickener in the center of the raceway, the bearing is in a mild lubrication state. Therefore, for Si3N4 hybrid ceramic ball bearings, lithium grease is a lubricant with good application prospects.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Manish Kumar, Rajnesh Tyagi
Summary: This study investigates the effect of density, shape of dimples, and sliding speed on the tribological performance of laser textured bearing steel under single drop lubrication. The results suggest that a lower density of bi-triangular dimples performed better in terms of reduced coefficient of friction and wear rate as compared to circular dimples or bi-triangular dimples with 20% density.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Materials Science, Multidisciplinary
Micha l Jakubczak, Anita Wojciechowska, Dario F. Zambrano, Daniel Moncada, Magdalena Birowska, Dorota Moszczynska, Karamullah Eisawi, Michael Naguib, Andreas Rosenkranz, Agnieszka M. Jastrz Ebska
Summary: Efficient solid lubrication is crucial for aerospace, automotive, and electrical systems. This study investigates the promising solid lubrication performance of a novel material called MBene, which exhibits low friction and excellent wear-resistance under harsh conditions. The study also demonstrates the formation of a beneficial tribo-layer, contributing to the reduction in observed friction and wear.
APPLIED MATERIALS TODAY
(2023)
Article
Chemistry, Physical
Yanfei Liu, Shengtao Yu, Wenzhong Wang
Summary: The study proposes a novel strategy for macroscale lubrication using non-layered 2D nanodiamond plates, which significantly reduce the coefficient of friction compared to conventional layered materials. This development has implications for engineering applications seeking to enhance lubrication systems at the macroscale.
Article
Engineering, Mechanical
Osama Brinji, Khosro Fallahnezhad, Paul A. Meehan
Summary: The experiments investigated the effects of normal pressure, sliding amplitude, and oscillating sliding frequency on friction, wear coefficient, and threshold energy for wear activation in 52100 high carbon bearing quality steel during a false brinelling test. The results showed that changes in normal pressure and sliding amplitude affected the friction and wear coefficients, while oscillating sliding frequency had little influence. Different conditions did not significantly impact the threshold energy for wear activation.
Article
Materials Science, Multidisciplinary
Ruyi Gou, Jiawang Zhao, Xun Luo, Jingjing Chen, Tao Liang, Jie Gong
Summary: In the water-based drilling fluid environment, the wear mechanisms of carbide bearings mainly include abrasive wear, adhesive wear, and oxidative wear. As the load increases, the coefficient of friction initially increases and then decreases, while the wear rate continues to increase. Furthermore, the water-based drilling fluid provides good lubrication at low loads but leads to more severe wear at high loads.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Edouard A. T. Davin, Anne-Lise Cristol, Arnaud Beaurain, Philippe Dufrenoy, Neomy Zaquen
Summary: Through braking tests, the wear and integrity of organic matrix brake pads against gray cast iron discs were studied. It was found that the LS pad is covered by a layer of solid oxidized steel, while the NAO pad suffers from deep cracks. Long steel fibers in the LS material help mitigate the brittleness of the matrix.
Article
Engineering, Mechanical
Can Wu, Kai Yang, Ying Chen, Jing Ni, Lidan Yao, Xinglin Li
Summary: This paper presents a comparative study of the tribological and vibration performance of synthesized lithium complex grease containing Carbon black, Fe3O4 and Al2O3 nanoparticles on rolling bearing. The results show that the presence of nanoparticles improves friction and wear behavior, with Al2O3 nanoparticles demonstrating the best tribological performance due to their high hardness, cylindrical shape, and deposition on the worn surface. Additionally, the wettability test indicates that Al2O3 nanoparticles can effectively promote base oil flow on the grease soap fibers, resulting in the most effective bearing vibration suppression.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Materials Science, Paper & Wood
Zhiqiang Shan, Xiaohua Jia, Rui Tian, Jin Yang, Sizhe Wang, Yong Li, Dan Shao, Lei Feng, Haojie Song
Summary: The shift from unsustainable to green, environmentally friendly, and recyclable preparation strategy of paper-based friction materials is important for low-carbon manufacturing. A wood-based slurry was created through a solvent encapsulation strategy involving wood dissolution in a deep eutectic solvent and lignin-cellulose structural reorganization. The resulting material, lignin-cellulose film (LCF), showed exceptional tensile strength and flexibility, as well as long-lasting frictional stability. The wood-based slurry could also be easily recycled or degraded in the natural environment, providing a promising alternative to traditional paper-based friction materials.
Article
Engineering, Mechanical
K. Masuda, S. Ishihara, N. Oguma, Y. Sakamoto, M. Iwasaki
Summary: In this study, sliding wear experiments were conducted on lead-free white metal under different types of lubricating fluids. The coefficient of friction and sliding wear characteristics were investigated, and it was found that the coefficient of friction is influenced by the lubricating oil viscosity and compressive stress. A method for quantitatively predicting the sliding wear life of white metals was proposed, which is valuable for the safety management and extension of bearing operating life.
Article
Engineering, Mechanical
Justine Decrozant-Triquenaux, Leonardo Pelcastre, Braham Prakash, Jens Hardell
Summary: This study focuses on the friction and wear behavior of aluminum alloys at high temperatures, showing that the formation of tribolayers can affect friction behavior, while adhesion-induced material transfer can impact tool life and product quality.
Article
Engineering, Mechanical
Pouria Valizadeh Moghaddam, Braham Prakash, Esa Vuorinen, Mikael Fallqvist, Jon M. Andersson, Jens Hardell
Summary: The reciprocating sliding wear tests were conducted on TiAlN coating against 316L stainless steel and carbide-free bainitic steel at temperatures of 40, 400 and 800 degrees C. The results showed that material transfer was more significant for the softer stainless steel at lower temperatures, while carbide-free bainite exhibited more material transfer at 800 degrees C. Friction coefficient increased for stainless steel with increasing temperature, but decreased for carbide-free bainite at elevated temperatures due to the formation of an easily sheared iron oxide layer. Additionally, the generation of a thin tribofilm containing aluminium oxide and oxidised transferred material could protect the TiAlN coating against wear at 800 degrees C in the case of stainless steel.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Justine Decrozant-Triquenaux, Leonardo Pelcastre, Cedric Courbon, Braham Prakash, Jens Hardell
Summary: This study aims to characterize the high temperature tribological behavior of selected PVD coatings and lubricants in sliding against aluminum alloy. The results showed that DLC and CrN coatings combined with the polymer lubricant were the most effective in reducing aluminum transfer.
Article
Engineering, Mechanical
A. Vikhareva, G. Macedo, L. Pelcastre, J. Hardell
Summary: The study compared the high temperature friction and wear behavior of AM produced maraging steel and conventional hot-work tool steel, revealing that the maraging steel exhibited higher friction instability and increased severity of wear at 700 degrees Celsius. The milled and ground surfaces displayed similar wear mechanisms, while the shot blasted surface showed less material build-up but more deformation and entrapment of particles in the near surface region.
Article
Engineering, Manufacturing
J. Domitner, Z. Silvayeh, A. Shafiee Sabet, K. I. Oksuz, L. Pelcastre, J. Hardell
Summary: This study investigated the coefficient of friction between tool steel and aluminum alloys using a strip drawing tribometer, finding that the COF increases with sliding distance. It was also observed that using moist pin surfaces can increase the COF, as the initially dry lubricant becomes sticky, promoting the entrapment of abraded aluminum particles.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Engineering, Mechanical
Maria Rodiouchkina, Jonna Lind, Leonardo Pelcastre, Kim Berglund, Asa Kassman Rudolphi, Jens Hardell
Summary: This study investigates the dry sliding behavior of fiber-reinforced thermosets and thermoplastics against stainless steel under typical hydropower conditions. Results show that the wear rates of both materials decrease significantly with time, with the thermoplastics exhibiting a decrease in coefficient of friction due to accelerated material transfer observed after 80 hours, while the fiber-reinforced thermoset shows its highest transfer amount after 20 hours. Surface analysis reveals severe abrasive wear of the counter surface caused by wear debris from steel and reinforcements in the material, accompanied by simultaneous increase in coefficient of friction for the thermoset. Crosssectional analysis indicates thinner transfer layers and higher wear of the steel in the middle of the wear tracks where sliding speed and load cycles are highest. These findings contribute to a more accurate interpretation of tribological performance of these materials, emphasizing the importance of counter surface material selection.
Article
Engineering, Mechanical
Juan Guillermo Zapata Tamayo, Marcus Bjorling, Yijun Shi, Braham Prakash, Roland Larsson
Summary: The study demonstrated that lubricating steel-steel contacts with Glycerol-water-glycol lubricant reduced mild wear and promoted micro-pitting as the main failure mode at low sliding levels compared to a commercial fully formulated gear oil. It was also observed that friction was significantly lower for the Glycerol-water and Glycerol-water-glycol lubricants, mainly due to a low pressure-viscosity coefficient.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Engineering, Mechanical
Hector Torres, Tugce Caykara, Jens Hardell, Janne Nurminen, Braham Prakash, Manel Rodriguez Ripoll
Summary: Iron-based coatings with solid lubricants prepared by laser cladding can control friction and reduce tool wear during high-temperature metal forming. The addition of lubricious compounds helps to lower friction and wear, while microstructural and phase composition studies have been conducted on the coatings at high temperatures.
Article
Engineering, Mechanical
Maria Rodiouchkina, Henrik Lindsjo, Kim Berglund, Jens Hardell
Summary: The effect of stroke length on the tribological performance of polymer composites used for bearings in hydropower turbines was investigated. Results showed that increased stroke length led to higher wear rates, and different friction behaviors were observed for thermoset and thermoplastic materials. Surface analysis revealed more severe wear of the stainless-steel counter surface at longer stroke lengths.
Article
Engineering, Mechanical
Gabriel Macedo, Leonardo Pelcastre, Jens Hardell
Summary: In recent years, the use of additive manufacturing (AM) to produce forming tools for hot stamping has gained increased interest due to the ability to tailor the die material and produce complex geometries. However, there is a lack of knowledge regarding the tribological behavior of AM materials, particularly at high temperature, as well as the influence of surface finishing processes. This study investigated the high temperature friction and wear behavior of a tool steel produced by selective laser melting, compared to conventionally produced steel, and found that the different surface finishes of the AM samples had varying effects on wear mechanisms and material transfer. The results showed similar friction and wear behavior between the AM and reference ground tool steel.
Article
Engineering, Mechanical
Maria Rodiouchkina, Kim Berglund, Fredrik Forsberg, Ilia Rodushkin, Jens Hardell
Summary: This study investigates the influence of stainless-steel counter surface roughness and lay on the tribological behavior of self-lubricating polymer composite bearings used in Kaplan turbines. The results show that overly smooth surfaces result in higher friction and wear of the counter surface, while rougher surfaces have a negative effect on the wear of the polymers.
Article
Engineering, Mechanical
Kim Berglund, Maria Rodiouchkina, Jens Hardell, Kalle Kalliorinne, Jens Johansson
Summary: The study aims to develop a novel reciprocating tribometer and test method that enables friction and wear tests under low-speed reciprocatory sliding with high contact pressures, and to evaluate the friction and wear performance of self-lubricating bearings for specific operating conditions found in Kaplan turbines.
Article
Engineering, Mechanical
Yankui Song, Ke Xiao, Guo Xiang
Summary: The novelty of this study lies in constructing an Entropy-based wear and fluid-solid-thermal (FST) coupled model for journal bearings, and revealing the transient interaction behavior between wear evolution and FST evolution during repeated starting and stopping. The wear rate is measured experimentally, and the contact temperature, friction coefficient and normal contact force are obtained from the validated FST model. Wear tests and numerical calculations are conducted to validate the predicted wear rate and investigate the time-varying wear and FST evolution of journal bearings.
Article
Engineering, Mechanical
Xin-long Liu, Xin Guan, Yuan Zhong, Qian Xiao, Yong Cao, Wu-lue Zhang, Song Zhang, Yi-ting Zheng, Ming-sheng Gao, Dao-yun Chen, Wen-bin Yang
Summary: Gaps in the conductor rail joints of intercity trains have an impact on current transmission and the wear of carbon skateboards. These gaps decrease the coefficient of friction, increase electrical contact resistance, and affect the wear rate of carbon skateboards.
Article
Engineering, Mechanical
Yuhang Wu, Conglin Dong, Xiuqin Bai, Chengqing Yuan
Summary: The study developed a new composite material by incorporating hexagonal boron nitride (h-BN) particles into a thermoplastic polyurethane (TPU) matrix, which exhibited excellent self-lubricating properties and reduced frictional excitation forces. The addition of h-BN particles effectively reduced the coefficient of friction, decreased fluctuation amplitude, enhanced wear resistance, and attenuated vibration behaviors.
Article
Engineering, Mechanical
Tiancheng Ouyang, Xiuyang Sun, Wentao Tang, Yinxuan Li, Zhi Qun Tian, Yanzhou Li
Summary: By adding nitrogen-doped graphene and C60 nanoparticles to the lubricant, a highly efficient nano-lubricant with vibration and noise reduction properties is synthesized.
Article
Engineering, Mechanical
Xin Zhuo, Jun Cao, Haibo Huang, Li Liu, Xinkun Suo, Peiqing Ye, Zeshan Abbas
Summary: A polymer coating prepared by liquid spraying technology on the surface of 20CrMo steel demonstrates good tribological and anti-cavitation erosive properties. It can effectively replace CuPb24Sn copper alloy in valve plates for pumps under different lubrication conditions. The coating exhibits adhesive wear and reduces frictional loss, and mainly shows abrasive wear under complex working conditions. Its lipophilicity, high hardness to elastic modulus ratio, and corrosion resistance are the main influencing factors for its performance.
Article
Engineering, Mechanical
Md. Aminul Islam, Jiaren (Jimmy) Jiang, Yongsong Xie
Summary: Erosion-corrosion is a major factor in material loss and reduced useful life of hydro-transport equipment. This study evaluates the erosion-corrosion characteristics of different materials and finds that matrix wear affects the degradation of carbides. Sufficient wear and corrosion resistance in the surrounding matrix are important for good erosion-corrosion resistance.
Article
Engineering, Mechanical
Andre Dubois, Oussama Filali, Laurent Dubar
Summary: This study investigates the effect of surface roughness, contact pressure, and lubrication on the onset of galling in aluminum 6082-T6 using a pin-on-plate tribometer. The experimental results show that the roughness and lubricants play a significant role in preventing galling.
Article
Engineering, Mechanical
Jizhan Wu, Peitang Wei, Guoqiang Liu, Difa Chen, Xiuhua Zhang, Taimin Chen, Huaiju Liu
Summary: This study conducted a comprehensive evaluation of the DLC coating treatment on the loading capacity of gears and characterized the surface features and fatigue performance. The results demonstrate that DLC coating significantly improves the hardness and surface residual compressive stress of the gears, as well as enhances their contact fatigue performance.
Article
Engineering, Mechanical
Yangping Liu, Hwaran Lee, Annsley Mace, Jeremy L. Gilbert
Summary: An AFM-based single asperity tribology method was used to investigate the wear performance of carbides and base metal matrix in high carbon CoCrMo alloy. The wear behavior of the two types of carbides was stress-dependent and influenced by chemical composition. Cr-rich carbides exhibited higher wear resistance compared to Mo-rich carbides.
Article
Engineering, Mechanical
Zdenek Riha, Michal Zelenak, Akash Nag, Jakub Poloprudsky, Tomas Kruml, Sergej Hloch
Summary: This study investigates the erosion performances of a high-speed modulated jet (MWJ) and continuous water jet (CWJ). By comparing different nozzles and water jet powers, the effects of modulated and continuous jets on aluminum alloy were studied. The results show that under certain conditions, modulated jet can create deeper and sharper grooves while reducing the impact of lateral flow.
Article
Engineering, Mechanical
Chunyu Yu, Weipu Li, Yang Guo, Xianbin Sun, Fanli Hong, Ning Sun, Qinghai Zhang
Summary: This study explores the relationship between the wear rate of train brake pads and its features, and proposes a method for predicting the wear rate suitable for small sample data. Grey relational analysis and Pearson correlation analysis are used to determine the preferred features that affect the wear rate, and a BOA-BP model is established for prediction. The results show that BOA-BP exhibits better advantages in prediction with small samples.
Article
Engineering, Mechanical
Shan Yin, Xin Zhao, Shuangchao Huang, Zefeng Wen, Xuesong Jin
Summary: This study simulated the rolling contact of a driving wheelset over tangent and curved tracks at a speed up to 500 km/h using an explicit finite element approach to derive creep curves. The comparison between quasi-steady curves and transient curves in the presence of rail corrugation helped to identify cases where traditional theories are inapplicable and where transient effects must be considered. Additionally, the study further analyzed the influence of middle/high-frequency vibrations in the presence of rail corrugation.
Article
Engineering, Mechanical
Jiyao Zhang, Yuanlie Yu, Junlei Tang, Yingying Wang, Honggang Sun, Kaikai Song, Jianhong Gong, Pingping Liu, Xiaoming Liu, Lina Hu, Parthiban Ramasamy, Juergen Eckert
Summary: The influence of high-carbon addition on the microstructure, hardness, and wear behavior of CoCrNi alloy was investigated. It was found that the addition of carbon resulted in the formation of carbide particles, enhancing the hardness and improving the wear resistance. Fracture and detachment of hard carbides during friction introduced additional abrasive particles, transitioning the wear mechanism from adhesive-dominated to abrasive-dominated.
Article
Engineering, Mechanical
Yanfei Liu, Shengtao Yu, Ruize Zhang, Xiangyu Ge, Wenzhong Wang
Summary: This study reports the tribological behavior of nanodiamond plate (NDPL) as a nanoadditive for the first time and compares it with nanodiamond particles (NDPA). The results show that NDPL provides better lubrication performance at higher concentrations, and the sliding between NDPLs and the structural transformation from sp3 to sp2 carbon play a crucial role in lubrication and wear resistance.
