...-D), and their tribological properties were evaluated with a four-ball friction and wear tester. DNS-2 with a larger particle size can form a high-strength tribofilm on rubbed surface through shear sintering, thereby reducing wear scar diameter of the steel ball. DNS-3, RNS-D, and RNS-E with smaller...

...Bo Han; Wang Zhaoqiang; Hong Ji; Lingtao Sun; Yangjun Lu The lubrication properties and friction characteristics of the port plate pair play a vital role in determining the overall lifespan of the axial piston pump, which makes the analysis of these parameters of significant importance...

...Ajith Kurian Baby; Rajendrakumar P. K.; Deepak Lawrence K. Uncertainty analyses can improve the reliability and validity of the assessment of friction and wear-rate of tribosystems. This work analyses the various sources of uncertainty in the estimation of friction and wear-rate of liner-ring pairs...

.... Compared to the LM13 base alloy, NDP composite containing 15 wt.% reinforcement showed significant improvement in hardness (57%), coefficient of friction (57%), mild-to-severe wear transition temperature, average steady-state wear rate (49%), and coefficient of thermal expansion (55%). CDP-15 composite...

... roller skew strain response loading zone nondestructive testing long-term monitoring actual service environment bearings contact contact mechanics friction rolling element bearings National Natural Science Foundation of China 10.13039/501100001809 U1834202...

... shear. The tribological mechanism of MSHH as a lubricant additive is proposed based on the decreased shear strength and weakened agglomeration. It is well known that the research and application of friction reduction and antiwear technology can improve the reliability of mechanical systems...

...Nanrong Hu; Hekun Jia; Bifeng Yin; Zeyuan Zhou; Bo Xu The elastohydrodynamic model of hydrodynamic air foil bearing has been built to study the influence of rotor speed, the friction coefficient between bearing components, load and other parameters on the foil displacement of hydrodynamic air...

... that the prediction results of the model considering the spin moment are closer to the theoretical values than those of the model ignoring this moment. However, the moment increases the friction at the ball/raceway interface, causing this model to underestimate the extent of bearing sliding. Analytical models...

.... The parameters, i.e., sliding distance, applied load, sliding velocity, and reinforcement content, are treated as inputs, whereas the wear-rate and coefficient of friction are considered output variables for the tribological experimentation. The influence of various input process parameters on the tribological...

... densification and hardening secondary phase. The coefficient of friction increases with laser power for the CW samples but decreases for the PW samples. The samples exhibited low wear rates ranging between 25 and 70 × 10 −5 mm 3 /Nm. Pulse wave samples demonstrated better tribological performance compared...

...Hiromitsu Kakudo; Satoshi Takada; Tomoko Hirayama The friction characteristics of SUS440C-Si 3 N 4 lubricated by polytetrafluoroethylene (PTFE) under cryogenic environment have not been researched well. The lubrication mechanisms in such friction condition need to be clarified to improve...

... intermittent motion should not be ignored, and the pressure, temperature rise distribution, and friction coefficient during the stop and start-up are fluctuated obviously. Under the condition of rough surface contact, the contact area will enter the mixed-EHL state during the stop and start-up. Shortening...

... plastic deformation and rapid surface heating, the surface porosities were effectively healed, thus reducing the surface roughness. Combined with the surface-strengthening effects of LSP, the frictional resistance and transfer layer formation on the CSAM LSP surfaces were reduced. The underlying...

... grit emery paper, and the mean surface roughness on the surface was measured as 0.65 μ m. The coefficient of friction (COF) values varying with the sliding distance were measured and recorded. After measuring the cross-sectional area of the wear tracks with a surface profilometer (Veeco Dektak 6M...

... performed. A maximum hardness of 133.3 HV was obtained at the top layer of the FGM. Pin-on-disc wear apparatus was used to evaluate the wear-rate and the coefficient of friction (COF) of the sintered specimen at varied loads. Specimens exhibited a low wear-rate of 2.36 × 10 −7 g/N m with 0.48 as the COF...

...Wyatt Peterson; Farshid Sadeghi; Andreas Meinel; Hannes Grillenberger A test rig was designed and developed to assess the lubrication and friction of a single cylindrical roller and a conformal cage pocket. The roller was lubricated via oil bath in a sealed housing. Inner and outer bearing raceway...

... Influence of different final speeds: ( a ) the shaft center, ( b ) eccentricity ratio, ( c ) the film thickness ratio λ , ( d ) coefficient of friction, and ( e ) the ratio of asperity contact load to external load Influence of different final speeds: (a) the shaft center, (b) eccentricity ratio, (c...

... to the adhesion and abrasion mechanism generated between the contact surfaces. In this work, the ball-on-flat experiments were performed on stainless steel-420 versus 100cr6 friction pairs under dry, minimum quantity lubrication (MQL) and pool conditions. Then, the wear studies in terms of volume loss, profile...

...Siyu Wang; Rupeng Zhu The mesh stiffness calculation of the planetary gear system with gear crack is investigated, and gear crack is modeled into end-face and addendum extended crack. Furthermore, the mesh stiffnesses are calculated under the effect of friction force obtained under the mixed...

... design faces considerable challenge to reduce friction losses, oil consumption, blow-by, and wear. Surface coatings have received great attention in applications of automotive engine components due to their unique friction properties. In this study, an elastic–plastic contact model of rough surfaces...