Laser surface treatment is a very useful technology for the fabrication of functional surfaces. In this study, novel antifouling surfaces are fabricated by laser cladding TC4 and Ni60 mixed materials in various mass ratios on 316L stainless steel substrates. Parametric studies carried out to investigate effects powder parameters performance clad coatings (LCCs). The mechanism LCCs investigated using water contact angle/surface energy measurement, scanning electron microscope (SEM)...

Purpose This paper aims to investigate the gear performance during meshing. The effects of line load, velocity and rough surfaces (kurtosis skewness) on lubrication characteristics fatigue life gears were analyzed. Design/methodology/approach In mixed thermoelastohydrodynamic (TEHL) model, distributions pressure film thickness are predicted using Reynolds equation. elastic–plastic contact model is used calculate force area. To predict gears, Dang–Van obtain parameters under different loads,...

In this paper, the start-up process of ring/liner system with surface texturing is studied. By employing a thermal-mixed lubrication model considering oil supply, tribological behavior textured under cold and hot conditions investigated. It found that friction coefficient curve condition different from result. The easier to form hydrodynamic than smooth surface, which helpful separate mixed lubricated contact surfaces. With features on ring face, less heat generated at phase. These effects...

In this study, the performance of surface texturing on nonflat surfaces is numerically investigated. A one-dimensional mixed-lubrication model considering oil supply employed. The cases ring lubrication with full and partial are conducted in steady-state engine-like conditions. By transport for lubricant distribution along liner, simulation whole pack also conducted. As a main conclusion, textured can obtain special benefit tribological properties under not only mixed lubrication, but...

The starved lubrication is common in engine. However, there are only few studies on problem for textured surfaces. In particular, the surface, a two-dimensional solution required to study their performances clearly, by considering pattern and distribution of cells. This article presents new analysis method problems with model, inlet boundary condition oil film needs be updated over process calculation. order obtain condition, flow conservation equations at region built determine position...

In recent years, the efforts to better control friction and wear have focused on surface topography modification through texturing. To study mutual influence of roughness texture features, this paper developed one comprehensive mathematical model mixed lubrication tribological performance rough-textured conjunction. The typical ring-liner conjunction was chosen as research object. particular, effects skewness kurtosis were considered based non-Gaussian distribution asperity height. way,...

Aiming to improve the comprehensive performance of journal bearing system, this paper presents a multi-objective adaptive scale texture optimization design approach. A mixed lubrication model for textured system is established by considering effects cavitation and roughness. The geometrical parameters textures were co-optimized using grey wolf optimizer obtain optimal schemes that are suitable different operating conditions. Through approach, influences under transient conditions can be...

Abstract For the ring/liner conjunction, well-designed surface texturing has been regarded as a potential means to improve its tribological performance, well application of coating. However, so far most researchers focused on one these aspects. In this study, combined effect coating and performance conjunction is numerically investigated. A thermal mixed lubrication model presented. The effects coating’s mechanical properties are studied under cold warm engine operating conditions. Along...

Abstract Surface texturing is one effective means to improve bearing performance. Available studies are mainly focused on the perfectly aligned journal with textures. The involving effect of surface misaligned still limited. In present study, a transient mixed lubrication model that allows predicting evolution friction characteristics high efficiency was proposed. misalignment under time-varying applied load considered using two deflection angles. performance provision for misalignments and...

This article employs a mixed lubrication model to investigate the performance of textured surface. The Jakobsson–Floberg–Olsson is used obtain hydrodynamic support conjunction, while calculation asperity contact load based on load-sharing concept. Based simulated Stribeck curves smooth surface and surface, comparisons are conducted study effect texturing under different regimes. It appears that transition regimes influenced by parameters convergence degrees conjunction. presence textures...

Abstract In order to find the effects of surface topography on tribological properties rough textured surfaces, an improved mixed lubrication model allowing specifying standard deviation, skewness, and kurtosis was developed. this model, by considering non-Gaussian average flow combined with a modified statistical elastoplastic asperity contact model. The performances slider bearings two arrays anisotropic textures were studied in terms Stribeck curves. It appears that are sensitive sliding...

In the case of journal-bearing system under a mixed or boundary lubrication regime, deformation bearing, flow lubricating medium, and contact asperities should be taken into account. The problem at journal-shaft interface is complicated fluid–solid coupling problem. this study, new approach proposed to analyze dynamic journal bearings. solved by presented non-linear hybrid conjugate gradient method, which based on principle pressure balance in zone. One transient model was developed...

Purpose As the crucial support component of propeller power system, reliability operation submersible pumps is influenced by lubrication performance water-lubricated thrust bearings. When bearings are under start-stop or heavy load conditions, effect surface morphology as mixed regime encountered. This paper aims to develop one model for predict effects skewness, kurtosis and roughness orientation on loading carrying capacity tribological behavior. Design/methodology/approach developed...