0
Research Papers: Elastohydrodynamic Lubrication

The Effect of Triangle-Shaped Surface Textures on the Performance of the Lubricated Point-Contacts

[+] Author and Article Information
Wen-zhong Wang

e-mail: wangwzhong@bit.edu.cn

Shanshan Li

School of Mechanical and Vehicular Engineering,
Beijing Institute of Technology,
Beijing 100081, People's Republic of China

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received May 18, 2012; final manuscript received November 4, 2012; published online March 18, 2013. Assoc. Editor: Dong Zhu.

J. Tribol 135(2), 021503 (Mar 18, 2013) (11 pages) Paper No: TRIB-12-1081; doi: 10.1115/1.4023206 History: Received May 18, 2012; Revised November 04, 2012

It has been recognized that purposefully designed surface texturing can contribute to the improvement of tribological performance of elements and friction reduction. However, its optimal parameters may depend on the operating conditions. This paper investigated the effect of a triangle-shaped dimples array on the tribological performance of the lubricated point-contacts under different lubrication regimes, based on the rotational sliding experiment of a patterned steel disk against smooth steel balls. The dimples arrays were produced by laser process and characterized by the 3D profilometer. A series of tests were conducted with different dimple parameters including depth, coverage ratio, size, and direction. Stribecklike curves were obtained to depict the transition of lubrication regimes, and the electrical contact resistance was utilized to qualitatively characterize the lubrication status. The test results showed that the dimples arrays with different sizes, depths and coverage ratios had a distinct effect on the friction behaviors. Compared with the nontextured surfaces, when the dimple depth decreased from 30μm to zero with fixed coverage ratio and size, the friction coefficient firstly decreased, and then increased. The friction coefficient finally approached that of the nontextured surface, during which the lowest value appeared at the dimple depth of approximately 10∼15μm. The coverage ratio of texture showed the similar effect on the friction coefficient. Usually, the coverage ratio of approximately 10% resulted in the lowest friction coefficient. The dimple size and direction also had obvious effects on the friction coefficient. Thus, it can be concluded that there exists a set of optimal values for the dimple depth, coverage ratio, size, and direction to realize the friction reduction.

Copyright © 2013 by ASME
Your Session has timed out. Please sign back in to continue.

References

Hirst, W., 1974, “Scuffing and its Prevention,” Charted Mechanical Engineer, 21, pp. 88–92.
Hamilton, D. B., Walowit, J.A., and Allen, C.M., 1966, “A Theory of Lubrication by Micro-Irregularities,” ASME, J. Basic Eng., 88(1), pp. 177–185. [CrossRef]
Jeng, Y.R., 1996, “Impact of Plateaued Surfaces on Tribological Performance,” Tribol. Trans.39(2), pp. 354–361. [CrossRef]
Hector, L. G., and Sheu, S., 1993, “Forced Energy Beam Work Roll Surface Texturing Science and Technology,” J. Mater. Process. Technol.2, pp. 63–117.
Etsion, I., Kligerman, Y., and Halperin, G., 1999, “Analytical and Experimental Investigation of Laser-Textured Mechanical Seal Faces,” Tribol. Trans.42, pp. 511–516. [CrossRef]
Etsion, I., 2000, “Improving Tribological Performance of Mechanical Seals by Laser Surface Texturing,” Proceedings of the 17th International Pump Users Symposium, Houston, Texas, pp. 17–22.
Kligerman, Y., and Etsion, I., 2001, “Analysis of the Hydrodynamic Effects in a Surface Textured Circumferential Gas Seal,” Tribol. Trans.44, pp. 472–478. [CrossRef]
Pride, S., Folkert, K., Guichelaar, P., and Etsion, I., 2002, “Effect of Micro-Surface Texturing on Breakaway Torque and Blister Formation on Carbon-Graphite Faces in a Mechanical Seal,” Lubr. Eng., 58, pp. 16–21.
Etsion, I., 2005, “State of the Art in Laser Surface Texturing,” ASME J. Tribol., 127(1), pp. 1–10. [CrossRef]
Ronen, A., Etsion, I., and KligermanY., 2001, “Friction-Reducing Surface-Texturing in Reciprocating Automotive Components,” Tribol. Trans.44(3), pp. 359–366. [CrossRef]
Ryk, G., Kligerman, Y., and Etsion, I., 2002, “Experimental Investigation of Laser Surface Texturing for Reciprocating Automotive Components,” Tribol. Trans., 45(4), pp. 444–449. [CrossRef]
Wang, X., Kato, K., Adachi, K., and Aizawa, K., 2001, “The Effect of Laser Texturing of SiC Surface on the Critical Load for the Transition of Water Lubrication Mode From Hydrodynamic to Mixed,” Tribol. Int., 34, pp. 703–711. [CrossRef]
Wang, X., Kato, K., Adachi, K., and Aizawa, K., 2003, “Loads Carrying Capacity Map for the Surface Texture Design of SiC Thrust Bearing Sliding in Water,” Tribol. Int., 36, pp. 189–197. [CrossRef]
Kovalchenko, A., Ajayi, O., Erdemir, A., Fenske, G., and Etsion, I., 2004, “The Effect of Laser Texturing of Steel Surfaces and Speed-Load Parameters on the Transition of Lubrication Regime from Boundary to Hydrodynamic,” Tribol. Trans., 47, 2, pp. 299–307. [CrossRef]
Wang, Q. J., and Zhu, D., 2005, “Virtual Texturing: Modeling the Performance of Lubricated Contacts of Engineered Surfaces,” ASME J. Tribol., 127, pp. 722–728. [CrossRef]
Siripuram, R., and Stephens, L. S., 2004, “Effect of Deterministic Asperity Geometry on Hydrodynamic Lubrication,” ASME J. Tribol., 126, pp. 527–534. [CrossRef]
Křupka, I., and Hartl, M., 2007, “The Effect of Surface Texturing on Thin EHL Lubrication Films,” Tribol. Int., 40, pp. 1100–1110. [CrossRef]
Dumont, M. L., Lugt, P. M., and Tripp, J. H., 2002, “Surface Feature Effects in Starved Circular EHL Contacts,” ASME J. Tribol., 124, pp. 358–366. [CrossRef]
Pettersson, U., and Jacobson, S., 2003, “Influence of Surface Texture on Boundary Lubricated Sliding Contacts,” Tribol. Int., 36, pp. 857–864. [CrossRef]
Dumitru, G., Romano, V., Weber, H. P., Haefke, H., Gerbig, Y., and Pflüger, E., 2000, “Laser Microstructuring of Steel Surfaces for Tribological Applications,” Appl. Phys. A: Mater. Sci. Process., 70, pp. 485–487. [CrossRef]
Gahr Zum, K. H., Wahl, R., and Wauthier, K., 2009, “Experimental Study of the Effect of Microtexturing on Oil Lubricated Ceramic/Steel Friction Pairs,” Wear267, pp. 1241–1251. [CrossRef]
Křupka, I., Vrbka, M., and Hartl, M., 2008, “Effect of Surface Texturing on Mixed Lubricated Non-Conformal Contacts,” Tribol. Int., 41, pp. 1063–1073. [CrossRef]
Vrbka, M., Samanek, P., Sperka, P., Navrat, T., Křupka, I., and Hartl, M., 2010, “Effect of Surface Texturing on Rolling Contact Fatigue Within Mixed Lubricated Non-Conformal Rolling/Sliding Contacts,” Tribol. Int., 43, pp. 1457–1465. [CrossRef]
Hu, Y. Z., and Zhu, D., 2000, “A Full Numerical Solution to the Mixed Lubrication in Point Contacts,” ASME J. Tribol., 122, pp. 1–10. [CrossRef]
Zhu, D., and Hu, Y. Z., 2001, “A Computer Program Package for the Prediction of EHL and Mixed Lubrication Characteristics, Friction, Subsurface Stresses and Flash Temperatures Based on Measured 3-D Surface Roughness,” Tribol. Trans., 44, pp. 383–390. [CrossRef]
Liu, Y., Wang, Q., Hu, Y., Wang, W., and Zhu, D., 2006, “Effects of Differential Schemes and Mesh Density on EHL Film Thickness in Point Contacts,” ASME J. Tribol., 128, pp. 641–653. [CrossRef]
Liu, Y., Wang, Q., Zhu, D., Wang, W., and Hu, Y., 2009, “Effects of Differential Scheme and Viscosity Model on Rough Surface Point-Contact Isothermal EHL,” ASME J. Tribol., 131, pp. 044501-1–044501-5. [CrossRef]
Zhu, D., 2007, “On Some Aspects in Numerical Solution of Thin-Film and Mixed EHL,” Proc. Inst. Mech. Eng., IMechE Conf., 221, pp. 561–579. [CrossRef]
Ren, N., Nanbu, T., Yasuda, Y., Zhu, D., and Wang, Q., 2007, “Micro Textures in Concentrated-Conformal- Contact Lubrication: Effect of Distribution Patterns,” Tribol. Lett., 28, pp. 275–285. [CrossRef]
Zhu, D., Nanbu, T., Ren, N., Yasuda, Y., and Wang, Q.J., 2010, “Model-Based Virtual Surface Texturing for Concentrated Conformal-Contact Lubrication,” Proc. Inst. Mech. Eng., IMechE Conf., 224, pp. 685–696. [CrossRef]
Nanbu, T., Ren, N., Yasuda, Y., Zhu, D., Wang,Q. J., 2008, “Micro-Textures in Concentrated Conformal-Contact Lubrication Effect of Texture Bottom Shape and Surface Relative Motion,” Tribol. Lett., 29, pp. 241–252. [CrossRef]
Baumgart, P., Krajnovich, D. J., Nguyen, T. A., Tam, A. C., 1995, “A New Laser Texturing Technique for High Performance Magnetic Disk Drives,” IEEE Trans. Magn., 31(6), pp. 2946–2951. [CrossRef]
Geiger, M., Roth, S., and Becker, W., 1998, “Influence of Laser-Produced Microstructures on the Tribological Behavior of Ceramics,” Surf. Coat. Technol, 101(1-3), pp. 17–22. [CrossRef]
Greco, A., Martini, A., Liu, Y. C., Lin, C., and Wang, Q. J., 2010, “Rolling Contact Fatigue Performance of Vibro-Mechanical Textured Surfaces,” Tribol. Trans., 53, pp. 610–620. [CrossRef]
Etsion, I., Kligerman, Y., and Halperin, G., 1999, “Analytical and Experimental Investigation of Laser-Textured Mechanical Seal Faces,” Tribol. Trans., 42(3), pp. 511–516. [CrossRef]

Figures

Grahic Jump Location
Fig. 1

Tribological test rig

Grahic Jump Location
Fig. 2

Schematic figure of tester and specimens

Grahic Jump Location
Fig. 3

Textured disk specimens

Grahic Jump Location
Fig. 4

Picture of single dimple before and after polishing along with imaginary unit cell and dimple profiles

Grahic Jump Location
Fig. 5

Texture images with different coverage ratios before polishing

Grahic Jump Location
Fig. 6

Texture images with different coverage ratios after polishing

Grahic Jump Location
Fig. 7

Cross section profiles of dimples

Grahic Jump Location
Fig. 8

surface roughness profiles

Grahic Jump Location
Fig. 9

The variation of dimple area against depth obtained by re-polishing the top surface

Grahic Jump Location
Fig. 10

Typical measurement results for textured surface

Grahic Jump Location
Fig. 11

The variation of electrical contact resistance with sliding speed

Grahic Jump Location
Fig. 12

Change of friction coefficient for textured surfaces with the different depths (side length of 443 μm and coverage ratio of 5%)

Grahic Jump Location
Fig. 13

Variation of friction coefficient with speed for textured surfaces with the different depth and coverage ratio (side length of 443 μ m)

Grahic Jump Location
Fig. 14

The variation of friction coefficients at different coverage ratios with a side length of 443 μm

Grahic Jump Location
Fig. 15

Friction coefficients for dimple arrays with different side lengths

Grahic Jump Location
Fig. 16

Friction coefficient with rotation speed with different coverage ratio and triangle direction

Grahic Jump Location
Fig. 17

Surface topography after test, the arrows indicate the rotation direction of the disk. (a) CCW; (b) CW; (c) RD

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In