Understanding the role of surface textures in improving the performance of boundary additives, part II: Numerical simulations

Azam, Abdullah; Dorgham, Abdel; Khaemba, Doris N.; Salehi, Fatemeh; See, TianLong; Neville, Anne

doi:10.1016/j.triboint.2020.106252

Cited by 8 publications

(3 citation statements)

References 48 publications

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“…It can basically be considered that the state that the relaxation-process time is 0 min as shown in figure 20 Figure 20 demonstrates that the average friction coefficient with the relaxation-process time of 0 min is lower than that with the relaxation-process time of 20 min. While the fluctuation of the friction The investigations [23,47] on the lubricant infiltration effects have revealed that the influence of the interaction (e.g., contact pressure and relative velocity) between the upper and lower samples of the friction pairs on the lubricant infiltration is important. A direct exploration of the effect of the velocity and contact pressure on the lubricant infiltration capacity is challenging, since the flow behaviors (e.g., lubricant spatter, lubricant separation and lubricant convergence) of the lubricant during the friction processes demand a high measurement effort.…”

Section: Effect Of the Lubricant Infiltration Capacity On The Tribolo...mentioning

confidence: 99%

Effect of lubricant infiltration into the groove-like surface texture on the friction response of the textured stainless-steel contact surface

Yang,

Cheng,

Zhao

et al. 2023

Surf. Topogr.: Metrol. Prop.

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Surface texturing is recognized as an effective solution for reducing friction on stainless-steel contact interfaces. Previous studies mainly focused on the influence of the texture parameters and lubricant-film depths on their tribology performances. Notably, whether the lubricant can penetrate texture and the lubricant infiltration capacity may significantly affect the tribology performances of the contact interfaces. They have been rarely considered, which may cause some well-designed textures to fail to perform their roles and be abandoned. Herein, a novel lubricant model is developed to explore the tribology performances of the contact interfaces with different lubricant infiltration capacities in textures and the influence factors of the lubricant infiltration capacities. Textured surfaces with different dimensions are fabricated by the femtosecond laser to explore the effects of the texture dimensions on the lubricant infiltration capacities. The results indicate that texture width, depth and lubricant viscosity could significantly affect the lubricant infiltration capacities. Moreover, the results indicate that the lubricant infiltration capacity would significantly affect the tribology performances of the contact interfaces. This work indicates that the impact of the lubricant infiltration should be considered in texture design. This work can be widely used to guide the texture design applied in plenty of fields.

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Section: Effect Of the Lubricant Infiltration Capacity On The Tribolo...mentioning

confidence: 99%

Effect of lubricant infiltration into the groove-like surface texture on the friction response of the textured stainless-steel contact surface

Yang,

Cheng,

Zhao

et al. 2023

Surf. Topogr.: Metrol. Prop.

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“…Due to MoS2 sheet formation in the tribological contact area, the reduction of the coefficient of friction values occurs [10][11][12][13][14]. MoDTC decomposition and MoS2 tribofilm formation can be influenced by many factors like oil formulation chemistry [14,15], tribological contact conditions such as surface roughness [16], texturing [17,18], temperature [12] and interacting surface materials [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

MoS2 tribofilm distribution from low viscosity lubricants and its effect on friction

Vaitkūnaitė

Espejo

Wang

et al. 2020

Tribology International

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“…Some studies have indirectly given evidence about the effect of roughness on tribofilm growth or vice versa. Recently, a study 48,49 suggested that surface textures that result in greater pressures, thicker lubricant films and greater contact area hold promise for optimal performance under tribochemically active conditions. Azam et al 27 performed a simulation study and suggested that the growth of tribofilm leads to increased lubricant entrapment.…”

Section: Introductionmentioning

confidence: 99%

Towards optimum additive performance: A numerical study to understand the influence of roughness parameters on the zinc dialkyldithiophosphates tribofilm growth

Wang

Dorgham

Liu

et al. 2020

Lubrication Science

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In recent years, several theoretical models to predict the triboreactive film thickness of zinc dialkyldithiophosphates (ZDDP) have been developed. Although these models are not complete and are approximate in nature, they provide a framework which can be used to evaluate the factors impacting the tribofilm growth. In this paper, rough surfaces with different roughness parameters were numerically generated and used to calculate the tribofilm growth. The simulation results show that lower negative skewness, higher kurtosis, and larger autocorrelation length values give thicker ZDDP tribofilms with skewness and autocorrelation values having a greater effect on the tribofilm growth. Based on the simulation results, it is found that these parameters influence the tribofilm growth by changing the contact ratio which eventually changes the dynamic growth of tribofilm and wear of substrate. The results presented in this paper have bigger implications for industry in designing surface textures that promote the anti-wear action.

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Understanding the role of surface textures in improving the performance of boundary additives, part II: Numerical simulations

Abstract: This is a repository copy of Understanding the role of surface textures in improving the performance of boundary additives, part II: Numerical simulations.

Cited by 8 publications

References 48 publications

Effect of lubricant infiltration into the groove-like surface texture on the friction response of the textured stainless-steel contact surface

Effect of lubricant infiltration into the groove-like surface texture on the friction response of the textured stainless-steel contact surface

MoS2 tribofilm distribution from low viscosity lubricants and its effect on friction

Towards optimum additive performance: A numerical study to understand the influence of roughness parameters on the zinc dialkyldithiophosphates tribofilm growth

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