Geometric influence on friction and wear performance of cast iron with a micro-dimpled surface

Ding, Shaopeng; Xu, Jia; Liu, Pengfei; Shi, Zhengliang; Yang, Ouxiang; Hu, Yuanpei

doi:10.1016/j.rineng.2021.100211

Cited by 17 publications

(17 citation statements)

References 19 publications

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“…However, when the diameter is larger than the contact width, the interference of a nearby pressure peak and the pressure trough of two adjoining textures may reduce the hydrodynamic effect. Nevertheless, oil is trapped as the depth increases, and the lubrication mechanism can shift from boundary to starved lubrication leading to higher friction and wear [41,61]. In that view, shallow and small circularly patterned dimples had a more noticeable effect on the hydrodynamic pressure, thus the friction reduction.…”

Section: Effect Of the Texture Sizementioning

confidence: 99%

“…Texture pit is characterized by an upper shape and a bottom shape. The upper shape can have various morphologies, including concave (Figure 4a) and convex textures [58,61,66,67] (Figure 4b). Hemisphere dimples and grooves are the first standard concave and convex texture pattern ever created.…”

Section: Effect Of the Texture Shapementioning

confidence: 99%

“…Many studies have been conducted regarding the standard design used in surface texture technology, with relatively great tribological performances [29,57,61,63,65]. According to Boidi et al [3], a hemisphere dimple can reduce friction by up to 20% and promote hydrodynamic lubrication at a specific low speed, whereas grooves exhibited little advantageous or negative effect on the COF [67].…”

Section: Effect Of the Texture Shapementioning

confidence: 99%

“…Many studies [61,67,74,[79][80][81][82] have investigated the influence of the texture-area ratio and area density with the optimal choice ranging from 5% to 20% for the area density and smaller than 1 for the area ratio to enhance the LCC and friction coefficient. Ding et al [61] found that an area density of 4% is advantageous for friction reduction on cast iron. Additionally, some previous research found a 16% area density to be optimum for lowering the COF and wear [67].…”

Section: Effect Of Area Density and Area Ratiomentioning

confidence: 99%

“…On the other hand, a dimple area ratio of 0.1 µm and a dimple area density of 20% reduced the friction by 40% [74]. The load bearing capability of the surface texture decreases as the area density rises, lowering the tribological features [61]. Recently, four different densities of 10%, 15%, 20%, and 25% with corresponding aspect ratios of 0.16 and 10% (texture 1), 0.16 and 15% (texture 2), 0.16 and 20% (texture 3), 0.16 and 25% (texture 4), and 0.08 and 10% (texture 5) were investigated [75].…”

Section: Effect Of Area Density and Area Ratiomentioning

confidence: 99%

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Design Methodology and Application of Surface Texture: A Review

Kouediatouka

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et al. 2022

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Surface texture is regarded as a promising solution for enhancing the tribological features of industrial materials due to its outstanding benefits, such as minimization of the contact area, enhancement of the load bearing capacity, storage of the lubricant, and management of the transition between lubrication regimes. Surface texture can be processed under either liquid or gas conditions. As compared to laser ablation in air, employing liquids or other gases as ablation media provides high accuracy and uniformity by limiting the heat-affected zone (HAZ) and other undesired defects to a large extent, as well as high crater structural features. In addition, the synergistic use of different liquid, solid, and additive lubricants with surface roughness recently demonstrated excellent performance. Therefore, surface texture helps to improve the tribological characteristics of a material. This paper reviews the design methodologies and applications of surface texture, emphasizing the proper selection of the appropriate laser parameters and ambient conditions for the best texture quality and functionality. Recent texture geometric design features to improve the film thickness and the self-lubricating system are presented. The ablation environment is explored using various media. The interaction between the lubricants’ types and surface textures is explored based on the operating conditions. Furthermore, surface texture applications using superhydrophobic surfaces, anti-drag, and vibration and noise friction are discussed. We hope that this review plays an enlightening role in follow-up research on laser surface texture.

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Section: Effect Of the Texture Sizementioning

confidence: 99%