Laser Surface Texturing for Ground Surface: Frictional Effect of Plateau Roughness and Surface Textures under Oil Lubrication

Yue, Hongzhi; Schneider, Johannes; Deng, Jianxin

doi:10.3390/lubricants12010022

Cited by 3 publications

(1 citation statement)

References 36 publications

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“…Surface texturing (ST) is a surface modification technique that effectively reduces frictional wear and enhances the performance of contact surfaces [1]. Traditional surface texturing techniques such as electrochemical discharge machining [2,3], reactive ion etching [4], and photolithography [5] have not fully met the increasing demands for the variety, scale, and precision of surface microstructures.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Near-Wall Laser-Induced Cavitation Bubble Micro-Dimple Formation on 7050 Aluminum Alloy

Cao,

Hu,

Shi

et al. 2024

Water

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To investigate the feasibility and formation laws of fabricating micro-dimples induced by near-wall laser-induced cavitation bubble (LICB) on 7050 aluminum alloy. A high-speed camera and a fiber-optic hydrophone system were used to capture pulsation evolution images and acoustic signals of LICB. Meanwhile, a three-dimensional profilometer was employed to examine the contour morphology of the surface micro-dimple on the specimen. The results show that at an energy level of 500 mJ, the total pulsation period for the empty bubble is 795 μs, with individual pulsation periods of 412.5 μs, 217 μs, and 165 μs for the first, second, and third cycles, respectively, with most energy of the laser and bubble being consumed during the first evolution period. Under the synergy of the plasma shock wave and collapse shock wave, a spherical dimple with a diameter of 450 μm is formed on the sample surface with copper foil as the absorption layer. A model of micro-dimple formed by LICB impact is established. As the energy increases, the depth of the surface micro-dimple peaks at an energy of 400 mJ and then decreases. The depth of the surface micro-dimple increases with the increase in the number of impacts; the optimal technology parameters for the micro-dimple formation by LICB impact are as follows: the absorption layer is copper foil, the energy is 400 mJ, and the number of impacts is three.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Near-Wall Laser-Induced Cavitation Bubble Micro-Dimple Formation on 7050 Aluminum Alloy

Cao,

Hu,

Shi

et al. 2024

Water

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Study on the wear resistance of micro-arc-oxidised ceramic films on the surface of TC4 titanium alloy oil well tubing in the Ordos Basin

Zhengjian

2024

Surface Engineering

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The use of titanium alloy oil well pipes in conventional and unconventional oil and gas explorations, developments and drillings in gas fields in the Ordos Basin is increasing. However, ensuring the safety of titanium alloy tubing is challenging because of the poor friction and wear resistance of these alloys. Herein, we strengthened the surface of a TC4 alloy oil well pipe through micro-arc oxidation to prepare oxidised ceramic films (MAO-TC4). Further, we investigated their friction and wear behaviours under different normal loads to analyse related mechanisms and improve the safety of titanium alloy oil well pipes. The results reveal a positive correlation between the coefficient of friction and wear volume under the normal load. In addition, the wear characteristics of MAO-TC4 are superior to those of the TC4 alloy in all contact forms. When paired with TC4 alloy balls, the adhesive wear and abrasive wear are dominant wear mechanisms. Meanwhile, when paired with Si3N4 ceramic balls, the wear mechanism is abrasive wear at the contact edge and slight oxidative and fatigue wear at the contact centre. Moreover, the MAO-TC4 alloy can effectively reduce oxidative wear. The cutting-to-plasticity ratio ( fcp) of MAO-TC4 is 0.8, and we weakened the micro-cutting mechanism to prevent material loss compared with TC4, which has an fcp of 0.95. In conclusion, MAO-TC4 can resist frictional wear at the alloy end face of titanium alloy oil well pipes. In addition, this study provides design concepts for improving the performance of the end face in the oil and chemical design for titanium alloys.

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Investigation of Effect of Surface Modification by Electropolishing on Tribological Behaviour of Worm Gear Pairs

Mašović,

Jakovljević,

Čular

et al. 2024

Lubricants

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Electropolishing using a high-current density results in a pitting phenomenon, producing a surface texture distinguished by many pits. Apart from the change in surface topography, electropolishing forms an oxide surface layer characterized by beneficial tribological properties. This paper introduces surface texturing in worm gear pairs by electropolishing a 16MnCr5 steel worm surface. Electropolishing produces surface pits 1 μm to 5 μm deep and 20 to 100 μm in diameter. The material characterization of 16MnCr5 steel is compared against the electropolished 16MnCr5 steel based on microstructure, hardness, surface topography and chemical composition. Experimental tests with worm pairs employing electropolished worms are conducted, and the results are compared to conventional worm pairs with ground steel worms. Electropolished worms show up to 5.2% higher efficiency ratings than ground ones and contribute to better running-in of worm gear pairs. Moreover, electropolished worms can reliably support full contact patterns and prevent scuffing due to improved lubrication conditions resulting from the produced surface texture and oxide surface layer. Based on the obtained results, electropolishing presents a promising method for surface texturing and modification in machine elements characterized by highly loaded non-conformal contacts and complex geometry.

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Laser Surface Texturing for Ground Surface: Frictional Effect of Plateau Roughness and Surface Textures under Oil Lubrication

Cited by 3 publications

References 36 publications

Experimental Study on Near-Wall Laser-Induced Cavitation Bubble Micro-Dimple Formation on 7050 Aluminum Alloy

Experimental Study on Near-Wall Laser-Induced Cavitation Bubble Micro-Dimple Formation on 7050 Aluminum Alloy

Study on the wear resistance of micro-arc-oxidised ceramic films on the surface of TC4 titanium alloy oil well tubing in the Ordos Basin

Investigation of Effect of Surface Modification by Electropolishing on Tribological Behaviour of Worm Gear Pairs

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