A Research on Friction Properties of Concave Laser-Textured Surface

2012 ◽  
Vol 184-185 ◽  
pp. 33-36
Author(s):  
Hua Qi Liang ◽  
Hui Fang Kong ◽  
Gen Fu Yuan
Keyword(s):  
Friction Coefficient ◽  
Nd:Yag Laser ◽  
Steel Surface ◽  
Surface Friction ◽  
Concave Surface ◽  
Textured Surface ◽  
Textured Surfaces ◽  
Friction Property ◽  
Fine Surface ◽  
Test Result

An object’s fine surface can change the object's surface friction property. So this paper aims to study the friction property of concave laser-textured surface through experiment. First, the Nd:YAG laser is used to generate micro-pores on Cr12 steel surface in the research and then its impact on object's surface friction property is studied. The test result shows that compared with the non-textured surfaces, the concave surface with area density of 5% and depth of I10.8 can reduce the friction coefficient significantly.

Experimental study on friction coefficient and temperature rise of heavy-load grease-lubricated spherical plain bearings with surface texture

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jinlong Shen ◽  
Tong Zhang ◽  
Jimin Xu ◽  
Xiaojun LIU ◽  
Kun Liu
Keyword(s):  
Friction Coefficient ◽  
Temperature Rise ◽  
Surface Texture ◽  
Tribological Performance ◽  
Textured Surface ◽  
Textured Surfaces ◽  
Roughness Parameters ◽  
Heavy Load ◽  
Friction Coefficients ◽  
Content Type

Purpose This paper aims to improve the tribological performance of grease-lubricated spherical plain bearings (SPBs) under heavy load, dimple-type textures were prepared by laser on the outer surface of the inner ring. The influence of roughness parameters of a textured surface on reducing friction coefficient and temperature rise was also explored. Design/methodology/approach This study adopts a laser processing method to fabricate dimple-type textures. Three-dimensional roughness parameters were used to characterize the textured surfaces. The friction coefficients of five SPBs with surface texture and one original commercially available SPB without surface texture under different nominal loads were measured on a self-established test rig. The data of temperature rise were obtained by nine embedded thermal couples. Findings The results indicate that SPBs with textures generally exhibit lower friction coefficients than the original SPB without textures. The dimple depth has a significant influence on improving the tribological performance, which coincides with the analysis by surface roughness parameters. A textured surface with negative Ssk and high Vvc has the minimum temperature rise. Originality/value As it is too difficult to arrange sensors into heavy-load SPBs, there are few reports about the temperature characteristics. Through nine embedded thermal couples, the distribution of temperature rise on the inner ring of SPBs was given in this study. The positive effect of surface texture on reducing temperature rise and friction coefficient was verified, which is beneficial for the design of heavy-load SPBs.

Applicability of Interrupted Micro Cutting Process “Tilling” as Surface Texturing

2017 ◽  
Vol 749 ◽  
pp. 241-245 ◽  
Author(s):  
Hatsuhiko Usami ◽  
Toshiki Sato ◽  
Yasuyuki Kanda ◽  
Satoru Nishio
Keyword(s):  
Friction Coefficient ◽  
Tribological Properties ◽  
Cast Alloy ◽  
Effective Means ◽  
Frictional Resistance ◽  
Cnc Machining ◽  
Cutting Process ◽  
Textured Surface ◽  
Textured Surfaces ◽  
Micro Cutting

Tribological properties of textured surfaces fabricated using a discontinuous microcutting process were investigated. Aluminum cast alloy (AC8A) discs were used for the specimens. The texturing process was carried out using a CNC machining center with a cutting edge with a novel geometry. The resulting surface morphology consisted of micro dimples with a diameter of 200-300 μm and a depth of 5-10 μm, with controlled area fractions of 10 and 40% and a top region finished with a milling cut. The tribological properties were evaluated using a ring-on-disc type testing apparatus under lubricated conditions, and showed that the friction coefficient of the textured surfaces was low and stable from the beginning of the experiment. A dependence of the friction coefficient on the area fraction was also found. Further reductions in the friction coefficient were achieved on a textured surface with a polished top region. It can be concluded that the proposed discontinuous micro cutting process is an effective means of fabricating a micro texture for the reduction and stabilization of frictional resistance.

scholarly journals Study on Friction and Lubrication Characteristics of Surface with Unidirectional Convergence Texture

Coatings ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 780 ◽  
Author(s):  
Chenchen Li ◽  
Xuefeng Yang ◽  
Shouren Wang ◽  
Yanjun Wang ◽  
Chongyang Lu ◽  
...  
Keyword(s):  
Friction Coefficient ◽  
Abrasive Wear ◽  
Simulation Analysis ◽  
Dynamic Pressure ◽  
Contact Fatigue ◽  
Hydrodynamic Pressure ◽  
Surface Friction ◽  
Textured Surface ◽  
Fatigue Wear ◽  
Lubrication Performance

In order to study the influence of texture on the wear and lubrication performance of the surface of the tools, three kinds of textures with unidirectional convergence morphology were processed on the surface of the samples, and each texture was designed with different area occupancy ratios. Simulation analysis shows that, owing to the reflow and convection effect of liquid in the texture, the lubricating film flowing through the textured surface has a high hydrodynamic pressure value, and the semicircular ring texture is the most prominent. By comparing the friction coefficient, when the area occupancy ratio of texture on the surface is 10%, the surface of the samples with different morphology has the lowest coefficient of friction; the friction coefficient of the semicircular ring textured surface is especially very low. Surface textures reduce the direct contact area between the friction pairs, and generate dynamic pressure lubrication and secondary lubrication, so that the surface friction coefficient of the samples is obviously reduced. The surfaces of the non-textured samples have abrasive wear and contact fatigue wear, and the surfaces of the textured samples have adhesive wear, abrasive wear, and cavitation.

Friction Reduction by Micro-Textured Surfaces in Lubrication

2018 ◽  
Vol 12 (4) ◽  
pp. 603-610 ◽  
Author(s):  
Yue Sun ◽  
Keita Shimada ◽  
Shaolin Xu ◽  
Masayoshi Mizutani ◽  
Tsunemoto Kuriyagawa ◽  
...  
Keyword(s):  
Friction Coefficient ◽  
Contact Surface ◽  
Friction Reduction ◽  
Experimental Investigations ◽  
Textured Surface ◽  
Textured Surfaces ◽  
Diamond Cutting ◽  
Tribological Tests ◽  
Sliding Direction

Experimental investigations were carried out to verify if the friction reduction in lubrication can be expanded by a textured surface with sawtooth riblets. Sawtooth riblets were formed by ultraprecision diamond cutting, with a ridge angle of about 60°–90° and height of about 20–50 μm on the contact surface. Six types of textured surfaces with different ridge angles, heights, and sliding directions were tested and compared with the untextured surface. The tribological tests were conducted by a flat-on-flat tribometer in lubrication. The effects of the ridge angle, height, and relative sliding direction on the friction coefficient in lubrication were reported.

Experimental Study on Anti-Friction Property of Groove Textured Surface with Different Direction Angles

2013 ◽  
Vol 281 ◽  
pp. 404-408 ◽  
Author(s):  
Chen Bo Ma ◽  
Jian Jun Sun ◽  
Hua Zhu ◽  
Jian Quan Li ◽  
Fei Zhou
Keyword(s):  
Experimental Study ◽  
Friction Coefficient ◽  
Smooth Surface ◽  
Combined Effect ◽  
Resistance Force ◽  
Textured Surface ◽  
Friction Property ◽  
Friction Effect ◽  
Direction Angle ◽  
Design And Application

To investigate the influence of different direction angles on groove textured surface, tribology experiments for smooth surface and groove textured surface with angles of 0°, 30°, 45°, 60°, 90° were carried on under various loads and velocities. The results show that, the friction coefficient decreases first and then increases with the increase of groove direction angle. And the optimal anti-friction effect could be obtained when the groove textured surface with angle of 60°, because of its superior combined effect of resistance force and liquid squeeze force, which are introduced by the groove. The findings could provide a theoretical guide for the design and application of groove textured surface.

Influence of Cutting Parameters on Frictional Coefficient of Micro-Textured Tool

2016 ◽  
Vol 693 ◽  
pp. 807-812
Author(s):  
Hong Yun Chen ◽  
Hai Dong Yang ◽  
Zheng Ye ◽  
Ning Ding
Keyword(s):  
Friction Coefficient ◽  
Feed Rate ◽  
Cutting Tools ◽  
Frictional Coefficient ◽  
Surface Friction ◽  
Cutting Parameters ◽  
Textured Surface ◽  
Best Value ◽  
Cemented Carbide Tools ◽  
Better Than

Micro-textured technology which studies in the field of tribology shows that micro-textured surface can effectively improve the situation of friction between the friction interfaces. In this article, micro-textured surface technology has been applied to the cutting tools, in order to study the cutting mechanism of micro-textured carbide tools. The effect of cutting parameters on surface friction characteristics was studied when cutting 45 steel with YT15 cemented carbide tools. The results shown that all surface friction coefficient of the samples got the best value when the feed rate is 0.14mm/r; an appropriate increasing in feed rate can reduce the surface friction coefficient in the low-speed cutting. Throughout the course of the test, the average of the surface friction coefficient of the 4th and the 5th sample tools are better than other tools.

Research on Friction Property of the Ni/ZrO2 Composite Infiltrated Layer on Cast Steel Surface under High Temperature

2014 ◽  
Vol 687-691 ◽  
pp. 4299-4302
Author(s):  
Xian Ming Sun ◽  
Gui Rong Yang ◽  
Lei Wei ◽  
Yu Lan Liu
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Friction And Wear ◽  
Steel Surface ◽  
Cast Steel ◽  
Composite Layer ◽  
Friction Property ◽  
Surface Composite Layer ◽  
Change Trend ◽  
Better Than

The surface composite layer Ni/ZrO2 on the ZG45 cast steel surface was fabricated through vacuum infiltration casting method. This paper researched on the Ni/ZrO2 composite infiltrated layer morphology, hardness and the friction property under fry friction. The results show that the added of the ZrO2 ceramic particles increase the composite infiltrated layer hardness and the wear resistance. The 15% ZrO2 composite infiltrated layer wear resistance is better than the 10% ZrO2 composite infiltrated layer. Different ZrO2 contents have same change trend. The friction coefficient decreases with the temperature increasing. The 10% ZrO2 friction coefficient changes obviously with the temperature increasing. The 15% ZrO2 friction coefficient changes evener than the 10% ZrO2 but the protection of friction and wear is more obvious.

Effects of single- and multi-shape laser-textured surfaces on tribological properties under dry friction

2019 ◽  
Vol 234 (7) ◽  
pp. 1382-1392
Author(s):  
Xianghua Zhan ◽  
Peng Yi ◽  
Yancong Liu ◽  
Peifa Xiao ◽  
Xiaoye Zhu ◽  
...  
Keyword(s):  
Friction Coefficient ◽  
Tribological Properties ◽  
Dry Friction ◽  
Nanosecond Laser ◽  
Textured Surface ◽  
Textured Surfaces ◽  
Wear Properties ◽  
Friction Tester ◽  
Pin On Disc ◽  
40Cr Steel

Textural morphology is an important factor influencing dry friction, and few studies have been conducted regarding the effects of single- and multi-shape textures on dry tribological properties. In this work, six types of textures including single- and multi-shape textures were produced on 40Cr steel samples by using a nanosecond laser. Reciprocating sliding tests under dry friction were conducted using a pin-on-disc friction tester. The influences of textured surfaces with different textures on tribological properties were investigated. Results showed that tribological properties were affected by different textural morphologies. The dimple-textured surface had the highest friction coefficient, followed by the groove-textured surface. The sinusoidal-textured surface had the lowest friction coefficient. The friction coefficients of multi-shape textured surfaces were lower than those of non-textured surfaces but higher than those of sinusoidal-textured surfaces. The wear properties of the tested surfaces were consistent with the friction-coefficient results. The sinusoidal- and sinusoidal–groove-textured surfaces can be considered as the optimum choices for dry reciprocating friction.

Tribological Investigation of Nano Composite Coated Titanium Alloy Surfaces under Unidirectional Sliding

2012 ◽  
Vol 622-623 ◽  
pp. 787-790
Author(s):  
Prem Ananth Muthuvel ◽  
Rajagopal Ramesh
Keyword(s):  
Titanium Alloy ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Tribological Properties ◽  
Critical Parameters ◽  
Textured Surface ◽  
Textured Surfaces ◽  
Wear Resistant ◽  
Tialn Coating ◽  
Wear Resistant Coatings

Industrial application of sliding components required to improve the tribological properties by increasing the surface hardness, friction and wear resistance. Modern modification of surface layers for friction applications combines surface texturing and filling of textured layers by wear resistant coatings of various compositions to improve its functional aspect and enhanced service life. Texturing of contact surfaces has a remarkable influence on their tribological properties, especially in the effect of wear and friction. This work proposes the coating of nano sized Titanium Aluminum Nitride (TiAlN) by Magnetron Sputtering-Physical Vapour Deposition (PVD) on the Titanium alloy (6Al-4V) substrate and study the performance of the coated surfaces by pin on disc tribometer. Two kinds of substrates were prepared one is the lapped surface and the other one is the textured surface by Laser beam machining. The Tribological performance of the wear resistant coatings on lapped and textured surfaces was experimentally investigated under various normal load conditions and the results were compared. Critical parameters such as friction coefficient, wear rate, wear volume, wear morphology and micro wear mechanism were investigated in this work. The coating surfaces and wear scars were evaluated by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDAX). The results showed that the TiAlN coating on textured surfaces exhibited lower friction coefficient and wear rate than the TiAlN coating on lapped surfaces under same testing conditions.

scholarly journals Prediction of Contact and Lubrication Characteristics of Micro-textured Surface Under Thermal Line Contact EHL

2021 ◽  
Vol 7 ◽  
Author(s):  
Jiang Zhao ◽  
Zhengminqing Li ◽  
Hong Zhang ◽  
Rupeng Zhu
Keyword(s):  
Friction Coefficient ◽  
Film Thickness ◽  
Contact Point ◽  
Surface Generation ◽  
Textured Surface ◽  
Line Contact ◽  
Textured Surfaces ◽  
Texture Surface ◽  
Cross Sectional ◽  
Film Pressure

In this study, a method combining numerical surface generation technology and three-dimensional hot-line contact EHL is employed to evaluate the contact characteristics of micro-textured surfaces under high-load line contact. Based on numerical simulation, the film thickness, film pressure, friction coefficient and surface flashing temperature of the virtual texture surface with different cross-sectional shapes and sizes are studied. On this basis, the subsurface stress at the contact point is calculated by the DC-FFT algorithm. The results show that, compared with a smooth surface, the micro-textures of different shapes all increase the average oil film thickness of the surface and reduce the friction coefficient, but at the same time lead to an increase in the contact stress of the surface. By changing the width and depth of the texture, the maximum film pressure has changed by 11.4 and 18.5%, respectively.

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