..., this article revolves around the effect of different current densities on the friction and wear of 7075-T6 aluminum alloy sheets. The change rule of friction coefficient under different current densities is derived through a friction test, and the variable friction simulation model is established. Scanning...

... asperity contact in the two nuts. Additionally, variations in load ratio, friction coefficient, and film thickness ratio (λ) are investigated. Considering the load ratio and λ of the slave nut, it can be inferred that boundary lubrication persists in the two nuts throughout the operation. Table 1...

... ournal of T ribology . 30 05 2022 15 08 2022 20 08 2022 26 09 2022 electroless coatings microstructure micro-scratching friction coefficient wear mechanism Performance and cost are two important criterion material candidates are expected to excel in to be able...

... micro-texture is combined with elliptical bearing, and the influence of micro-texture shape, micro-texture depth, and micro-texture radius on oil film pressure, bearing capacity, and friction coefficient of elliptical bearing is studied by theoretical calculation and experimental research. The results...

... metallic glass friction coefficient nitrogen doping dry friction hardness wear National Natural Science Foundation of China 10.13039/501100001809 51735003 Bulk metallic glass refers to metallic glass whose three-dimensional scale is above the millimeter level, which was born...

... to enhance running-in quality. In order to reveal the evolution of phase trajectory and compare the running-in quality, the running-in tests were performed with the material of a bearing bush (Sn-11Sb-6Cu) and shaft (AISI 1045). The running-in quality was comprehensively evaluated via friction coefficient...

...Yuankai Zhou; Minglong Peng; Xue Zuo; Jing Xu The friction coefficient is difficult to measure in a real application, whether friction coefficient and vibration signals have the same dynamic characteristics is an urgent issue to be solved. The running-in friction tests were carried out under dry...

... is in a fully flooded state due to improvement in lubricant replenishment. In addition, the corresponding friction coefficient tends to increase or be constant in terms of contact states. The mechanisms of the grease behavior related to shear actions and grease properties are analyzed. Email: 1411804019...

...Bangzhi Wu; Datong Qin; Jianjun Hu; Yonggang Liu In this study, an experiment is conducted for assessing the friction characteristics of a wet clutch on actual working conditions, to determine how various factors influence the friction coefficient in the actual working process of a wet clutch...

... is in contact with the longitudinal roughness with finite length and when it is in contact with the longitudinal roughness with infinite length. In the contact between surfaces with infinitely long longitudinal and transverse roughness, the friction coefficient is lower when the surface with longitudinal...

...Shuren Qu; King Him Lo; Su Su Wang This paper investigates the effect of transfer films on friction coefficient of polytetrafluoroethylene (PTFE)/polyetheretherketone (PEEK) composite. Friction experiments were carried out first to investigate transfer-film development during sliding contact...

.... It is found that in the velocity range of 10–100 m/s, the sliding velocity–friction coefficient relationship well complies with the fitted exponent or hyperbolic tangent function, and the friction coefficient approaches a stable value of 0.3 at around the velocity of 50 m/s after a rapidly increasing...

... are three scratch process parameters: tip normal force, tip radius, and shear friction coefficient. The outputs are four variables related to material deformation measured during scratch: scratch depth, elastic recovery height, plowing height, and plowing friction coefficient. The network is trained...

... performance at lower braking speed and pressure. However, NGF shows more stable friction coefficient, lower linear wear loss, and lower maximum temperature during the braking process at worse braking conditions, e.g., 350 km/h, 1.5 MPa. The Ni-coating on the surface of Ni-coated graphite can transfer...

...) In the transition state after the gas supply stopped, the NLGF provided a longer response lag time than the pure gas film. (3) In the contact state, the NLGF can protect the bearing surfaces from severe damage in terms of reductions in the friction coefficient and the surface roughness. Moreover, the NLGF kept...

... on lubrication performance along the line of action are discussed. helical gear Eyring power law friction coefficient Lubrication failure is one of the most popular types of failure for gear drives. An accurate evaluation of the lubrication performance of gear drives would help engineers detect...

... from 30μm to zero with fixed coverage ratio and size, the friction coefficient firstly decreased, and then increased. The friction coefficient finally approached that of the nontextured surface, during which the lowest value appeared at the dimple depth of approximately 10∼15μm. The coverage ratio...

... gradient method (CGM) and the discrete convolution and fast Fourier transform (DC-FFT) technique, was employed to analyze the contact problem. By using this method, the von Mises stress distributions for various combinations of coating thicknesses, friction coefficients, and elastic moduli of the coating...

... ). The force center, x N , is obtained by 23 x N ( h 0 , β s , m , a ) = I M ( h 0 , β s , m , a ) 2 a I N ( h 0 , β s ) Friction coefficient due to elastic deformation is equal to 24 μ ( h 0 , β s , m...

...Yu-Song Pan; Dang-Sheng Xiong; Xiao-Lin Chen The effects of different variables on the friction coefficient of poly(vinyl alcohol) (PVA) hydrogel and stainless steel ball counterpart were investigated by a ball-on-plate friction and wear tester. Factors included lubrication condition, sliding speed...