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A finite-element-aided ultrasonic method for measuring central oil-film thickness in a roller-raceway tribo-pair
Springer Science and Business Media LLC - Tập 10 - Trang 944-962 - 2021
Roller bearings support heavy loads by riding on an ultra-thin oil film (between the roller and raceway), the thickness of which is critical as it reflects the lubrication performance. Ultrasonic interfacial reflection, which facilitates the non-destructive measurement of oil-film thickness, has been widely studied. However, insufficient spatial resolution around the rolling line contact zone rema......
Behaviors of a micro oil droplet in an EHL contact
Springer Science and Business Media LLC - Tập 4 - Trang 359-368 - 2016
Oil–air lubrication supplies lubricants in the form of droplets to elastohydrodynamic lubrication (EHL) contacts, such as those in high-speed spindle bearings. However, there is a paucity of information related to understanding the lubrication behaviors of oil droplets within EHL contacts. In this study, behaviors of lubricant droplets, in terms of spreading around a static contact as well as pass......
Tribological performance and scuffing behaviors of several automobile piston rings mating with chrome-plated cylinder liner
Springer Science and Business Media LLC - Tập 10 - Trang 1245-1257 - 2021
The friction and wear properties, as well as the scuffing resistance, of different piston-ring coatings mating with a chrome-plated cylinder liner were investigated. Interrupted wear tests under the lubricant starvation condition were conducted to examine the wear behavior of Cr-diamond coating (GDC) and diamond-like coating (DLC). The results indicated that the DLC coating had outstanding tribolo......
Does laser surface texturing really have a negative impact on the fatigue lifetime of mechanical components?
Springer Science and Business Media LLC - Tập 9 - Trang 1766-1775 - 2021
Laser surface texturing (LST) has been proven to improve the tribological performance of machine elements. The micro-scale patterns manufactured by LST may act as lubricant reservoirs, thus supplying oil when encountering insufficient lubrication. However, not many studies have investigated the use of LST in the boundary lubrication regime, likely due to concerns of higher contact stresses that ca......
Prediction of wear loss quantities of ferro-alloy coating using different machine learning algorithms
Springer Science and Business Media LLC - Tập 8 - Trang 107-114 - 2019
In this study, experimental wear losses under different loads and sliding distances of AISI 1020 steel surfaces coated with (wt.%) 50FeCrC-20FeW-30FeB and 70FeCrC-30FeB powder mixtures by plasma transfer arc welding were determined. The dataset comprised 99 different wear amount measurements obtained experimentally in the laboratory. The linear regression (LR), support vector machine (SVM), and Ga......
Optimization of several surface treatment processes for alleviating fretting damage of a locking pin
Springer Science and Business Media LLC - Tập 10 - Trang 1217-1233 - 2021
The operational safety and reliability of a variable gauge train are affected by the anti-fretting wear performance of the locking mechanism. The main purpose of this study is to optimize the surface treatment process for a locking pin material under actual service conditions to alleviate fretting damage. Based on the two basic principles of surface strengthening and friction reduction, a substrat......
Dynamics of lubricated spiral bevel gears under different contact pathsAbstract To assess the meshing quality of spiral bevel gears, the static meshing characteristics are usually checked under different contact paths to simulate the deviation in the footprint from the design point to the heel or toe of the gear flank caused by the assembly error of two gear axes. However, the effect of the contact path on gear dynamics under lubricate... ...
Springer Science and Business Media LLC - Tập 10 Số 2 - Trang 247-267 - 2022
Atomistic simulations of friction at an ice-ice interface
Springer Science and Business Media LLC - Tập 1 - Trang 242-251 - 2013
Even though the slipperiness of ice is important both technologically and environmentally and often experienced in everyday life, the nanoscale processes determining ice friction are still unclear. We study the friction of a smooth ice-ice interface using atomistic simulations, and especially consider the effects of temperature, load, and sliding velocity. At this scale, frictional behavior is see......
Novel model of material removal rate on ultrasonic-assisted chemical mechanical polishing for sapphire
Springer Science and Business Media LLC - Tập 11 - Trang 2073-2090 - 2023
Ultrasonic-assisted chemical mechanical polishing (UA-CMP) can greatly improve the sapphire material removal and surface quality, but its polishing mechanism is still unclear. This paper proposed a novel model of material removal rate (MRR) to explore the mechanism of sapphire UA-CMP. It contains two modes, namely two-body wear and abrasive-impact. Furthermore, the atomic force microscopy (AFM) in......
Metal matrix nanocomposites in tribology: Manufacturing, performance, and mechanisms
Springer Science and Business Media LLC - Tập 10 - Trang 1596-1634 - 2022
Metal matrix nanocomposites (MMNCs) become irreplaceable in tribology industries, due to their supreme mechanical properties and satisfactory tribological behavior. However, due to the dual complexity of MMNC systems and tribological process, the anti-friction and anti-wear mechanisms are unclear, and the subsequent tribological performance prediction and design of MMNCs are not easily possible: A......
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