The size effect of hexagonal texture on tribological properties under mixed lubrication

Zheng, Long; Gao, Yihang; Zhong, Yinghui; Lu, Guolong; Liu, Zhenning; Liu, Ren

doi:10.1108/ilt-12-2017-0391

Cited by 6 publications

(7 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The laser processing used the laser power of 30 W with a scanning speed of 500 mm/s. The defocused laser was 0.05 mm in diameter, and the pulse duration was 20 kHz [39]. Both the specimens and counter-disks were polished by abrasive paper and grinding paste to achieve the RMS surface roughness (Ra) of 0.2 µm after laser texturing [33].…”

Section: Fabrication Of Specimensmentioning

confidence: 99%

Influence of Cross-Grooved Texture Shape on Tribological Performance under Mixed Lubrication

Zheng

Guo

et al. 2022

Coatings

Self Cite

View full text Add to dashboard Cite

Surface texture plays an important role in improving the tribological properties of materials. In this paper, the effect of different shapes (i.e., triangle, square, hexagon, round) on the tribological performance of cross-grooved texture was investigated. First, the mixed lubrication condition was used for the pin-on-disc rotating sliding tests. Then, the stress distribution of the four textures was analyzed to better explain the experimental results. Overall, the hexagon-textured specimens exhibited lower friction coefficients than the other shape-textured specimens under the examined conditions. Simulation results indicate that the contact stress can be reduced on the surface of hexagon-textured specimens, and this leads to a better oil film for lubrication. Furthermore, the hydrodynamic lubrication stood out with the increase of speeds to 250 rpm. However, as the test loads further increased, the film thickness decreased, resulting in the increase in the asperity contact areas, which dropped the above advantage of hexagon-textured specimens. This study would be beneficial for the texturing tribological and lubrication design.

show abstract

Section: Fabrication Of Specimensmentioning

confidence: 99%

Influence of Cross-Grooved Texture Shape on Tribological Performance under Mixed Lubrication

Zheng

Guo

et al. 2022

Coatings

Self Cite

View full text Add to dashboard Cite

show abstract

“…24,25 The effect of the size under lubrication condition of the hexagonal texture on the tribological performance and the optimal size can be obtained by calculation of the liquid film fluid and tribological tests. 26 From the above studies, it can be observed that various textures were created on artificial joint materials, and theoretically and experimentally confirmed the excellent antifriction and anti-wear properties of the surface. In addition, there were also some applications and theoretical calculations about the hexagonal texture.…”

Section: Introductionmentioning

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Laser hexagonal texture on surface of Ti6Al4V for the improvement of fluid spreadability and tribological properties

Liu

Yuan

Jiang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

The joint capsule removal after artificial joint replacement surgery have led to improper lubrication, causing the pair to wear out quickly and reducing the joint lifespan. In this paper, laser processing and chemical corrosion were used to prepare a hexagonal convex texture on the surface of titanium alloy (Ti6Al4V). After etching and laser polishing, SEM images indicated the presence of secondary micro-nano textures in the grooves around the hexagonal texture, and the formation of anatase oxides on the surface, resulting in an increase of the surface energy and a very small contact angle (CA). The surfaces’ CA increases with the texture ratio, and the surface is super-hydrophilic when the texture ratio is less than 0.84. Furthermore, the effect of texture parameters and directions are studied by using UHMWPE and Ti6Al4V as friction pairs and simulated body fluid as lubricant. The COF is 0.068 with 0.84 area ratio, which is 51.4% lower than the original surface. The wear rate of UHMWPE on the textured surface decreases by 74.5% after two hours of tribological testing. In addition, high speed camera images and calculation results proved that creating grooves can promote fluid distribution on the textured surface. The surface texture on titanium alloy results in a significant COF and wear reduction, extending the service life of artificial joints.

show abstract

“…Galda et al (2016) found that the presence of dimples improved the tribological characteristics under starved lubrication conditions at low sliding speeds through sliding friction tests of steel-steel materials. Zheng et al (2018) elucidate the size effect (groove width, unit length and area density) of the hexagonal texture on tribological performance under lubrication. Niu et al (2021) found that the depth of the dimple is the main factor that significantly affects the friction and wears performance of the steel surface in nonconformal contact under starved lubricated conditions by the friction and wears tests.…”

Section: Introductionmentioning

confidence: 99%

Effects and optimization of bionic texture parameters on the tribological behavior of line contacts under starved lubrication conditions

Zhang,

Chen,

Yin

et al. 2024

ILT

View full text Add to dashboard Cite

Purpose Gears are prone to instantaneous failure when operating under extreme conditions, affecting the machinery’s service life. With numerous types of gear meshing and complex operating conditions, this study focuses on the gear–rack mechanism. This study aims to analyze the effects and optimization of biomimetic texture parameters on the line contact tribological behavior of gear–rack mechanisms under starvation lubrication conditions. Design/methodology/approach Inspired by the microstructure of shark skin surface, a diamond-shaped biomimetic texture was designed to improve the tribological performance of gear–rack mechanism under starved lubrication conditions. The line contact meshing process of gear–rack mechanisms under lubrication-deficient conditions was simulated by using a block-on-ring test. Using the response surface method, this paper analyzed the effects of bionic texture parameters (width, depth and spacing) on the tribological performance (friction coefficient and wear amount) of tested samples under line contact and starved lubrication conditions. Findings The experimental results show an optimal proportional relationship between the texture parameters, which made the tribological performance of the tested samples the best. The texture parameters were optimized by using the main objective function method, and the preferred combination of parameters was a width of 69 µm, depth of 24 µm and spacing of 1,162 µm. Originality/value The research results have practical guiding significance for designing line contact motion pairs surface texture and provide a theoretical basis for optimizing line contact motion pairs tribological performance under extreme working conditions.

show abstract

The size effect of hexagonal texture on tribological properties under mixed lubrication

Cited by 6 publications

References 44 publications

Influence of Cross-Grooved Texture Shape on Tribological Performance under Mixed Lubrication

Influence of Cross-Grooved Texture Shape on Tribological Performance under Mixed Lubrication

Laser hexagonal texture on surface of Ti6Al4V for the improvement of fluid spreadability and tribological properties

Effects and optimization of bionic texture parameters on the tribological behavior of line contacts under starved lubrication conditions

Contact Info

Product

Resources

About