...Md Hafizur Rahman; Pradeep L. Menezes Conventional lubricants face significant challenges in electric vehicle (EV) systems due to their low electrical conductivity and inability to mitigate tribo-electrification effects which can result in increased friction, wear, and electrical discharge damage...

... nitrogen exhibited unexpected improvements in friction and wear characteristics. Hardness, X-ray diffraction (XRD), and transmission electron microscopy (TEM) tests at low temperatures were conducted to explore the underlying mechanisms. The Leeb hardness of the graphite at low temperature (665.3 HL...

.... Wear and frictional behaviors are important when the TBCs are subject to foreign object contact. To characterize the wear performance of TBCs, this study presents an improved discrete element method (DEM)-based model to investigate the wear mechanisms induced by friction at the microscopic level...

...Ying Xu; Kang Fu; Shengfang Yu; Lulu Yao; Yufu Xu To address friction and wear issues in machining AISI 1045 steel, a novel oil-in-water microemulsion cutting fluid was developed using white oil, water, and eco-friendly additives (tricarboxylic acid and tall oil fatty acid amide). Tribological...

...Xin Liu; Jing Zhang; Peng Sui Under lean lubrication conditions, as well as during cold and hot starts of the engine, the cylinder liner and piston rings experience significant wear, which affects the engine's efficiency and lifespan. The dry friction and wear behaviors of HT200 encountered...

... friction in the cutting zone. Repurposing UCO for machining applications contributes towards sustainable development. A low-cost venturi spray lubrication system that requires only compressed air for operation is designed, developed, and tested. The oil properties that affect machining are studied...

...Jiang Wei; Kun Liu; Xiaojun Liu; Yi Feng; Jiaxin Ye Previous studies have established the critical role of tribochemistry in the formation of protective transfer films in dry friction applications of polytetrafluoroethylene (PTFE) composites. However, the specific mechanisms driving these reactions...

...Rajesh Kannan Kasi; Vaira Vignesh Ramalingam; Dhinakaran Veemanf; M. Govindaraju Sintered friction materials contribute to efficiency and effectiveness in various domains, encompassing high-performance racing cars, motorcycle clutches, industrial brakes designed for machinery and equipment...

... under dry sliding conditions at room temperature using a pin-on-disk tribometer. A combined optimization of specific wear-rate (SWR) and coefficient of friction (COF) was carried out using the response surface methodology with a desirability approach, alongside regression models for individual responses...

... and matrix softening increased the coefficient of friction (CoF) until 100m of sliding distance, where stabilization occurred. Hybrid ceramic reinforcement improved abrasive wear resistance and limited oxidation wear by reducing tribo-oxide formation up to 300°C. This enhancement in abrasive wear resistance...

... relative sliding occurs, the rough peaks and the abrasives produced in the friction process cause furrows and cutting on the friction surface. The SEM image in Fig. 10( a ) reveals numerous furrows, grooves, and layered peeling on the worn surface of the Ni–P coating, indicating severe abrasive wear...

... behavior at the surfaces of the rib and roller end. In this study, a model of cylindrical roller bearings was developed under combined load. In the model, the quasi-dynamic calculation was coupled with the elastohydrodynamic lubrication program to evaluate axial load-carrying capacity and frictional loss...

... retention. These dual effects result in PPIs with larger pores displaying a low friction coefficient at low speeds but a high friction coefficient at high speeds. The effect of pore sizes on elastohydrodynamic (EHD) film and Stribeck curves were discussed from seepage effect and viscoelasticity of PPI...

...Kai Feng; Ziqi Song; Jing Ni; Xiaozhen Wang; Mingyang Du The broaching process is a heavy-duty and highly efficient metal-cutting technique. The heavy load encounters significant thermal and mechanical stresses on the tool during broaching, resulting in considerable friction within the tool–chip...

.... A ring-block friction experiment was conducted under simulated drilling conditions, examining groove textures with various geometric parameters. The effects of groove texture parameters—depth, area ratio, skew angle, and width—on the tribological performance were analyzed using friction coefficient, wear...

... for publication in the J ournal of T ribology . 30 08 2024 11 02 2025 11 02 2025 03 03 2025 fluid friction friction gears lubricant additives lubricants tribological systems viscosity It is now widely recognized that climate change is caused by CO2 emissions...

...Sikta Panda; Gaurab Kumar Ghosh; Ritesh Kumar Patel; Subrata Kumar Ghosh; Sandeep Bhoi Effective lubrication is one of the most vital aspects for desirable productivity in mechanical systems. This can be achieved through reduced friction and wear between mating components by proper lubrication...

...Michele Ciavarella; Emanuel Willert We study the effect of elastic material grading close to the surface in line contacts with friction on internal stresses, particularly to quantify the reduction of tensile principal stresses due to grading. We observe that for the classical indentation...

... friction hydrodynamic lubrication During heavy machine tool processing, the center of mass of the processed components tends to deviate from the center of the worktable. This deviation is caused by irregularities in the geometry of the machined component or offsets in the component clamping...

..., an analysis of the tribological performance of potential coating material candidates was conducted. This study focuses on evaluating the friction and wear characteristics of various coatings widely used by industry for surface protection, including carbides, nitrides, diamond-like carbon (DLC), and solid...