Tribology Characteristics in 200 μm of Hexagonal Array Dimple Pattern
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초록
This study investigates the effects of a pattern of 200 μm dimples in a hexagonal array on tribological characteristics. A textured surface might reduce the friction coefficient and wear caused by third-body abrasion and thus improve the tribological performance. There are three friction conditions based on the Stribeck curve: boundary friction, mixed friction, and fluid friction conditions. In this experiment, we investigate the friction characteristics by carrying out the friction tests at sliding speeds ranging from 0.06 to 0.34 m/s and normal load ranging from 10 to 100 N. We create dimple surfaces for texturing by using the photolithography method. There are three kinds of specimens with different dimple densities ranging from 10% to 30%. The dimple density on the surface area is the one of the important factors affecting friction characteristics. Friction coefficient generally decreases with an increase in the velocity and load, indicating that the lubrication regime changes depending on the load and velocity. The fluid friction regime is fully developed, as indicated by the duty number graph. Fluid friction occurs at a velocity of 0.14-0.26 m/s. The best performance is seen at 10% dimple density and 200 μm dimple circle in the hexagonal array.
Abstract
This study investigates the effects of a pattern of 200 μm dimples in a hexagonal array on tribological characteristics. A textured surface might reduce the friction coefficient and wear caused by third-body abrasion and thus improve the tribological performance. There are three friction conditions based on the Stribeck curve: boundary friction, mixed friction, and fluid friction conditions. In this experiment, we investigate the friction characteristics by carrying out the friction tests at sliding speeds ranging from 0.06 to 0.34 m/s and normal load ranging from 10 to 100 N. We create dimple surfaces for texturing by using the photolithography method. There are three kinds of specimens with different dimple densities ranging from 10% to 30%. The dimple density on the surface area is the one of the important factors affecting friction characteristics. Friction coefficient generally decreases with an increase in the velocity and load, indicating that the lubrication regime changes depending on the load and velocity. The fluid friction regime is fully developed, as indicated by the duty number graph. Fluid friction occurs at a velocity of 0.14-0.26 m/s. The best performance is seen at 10% dimple density and 200 μm dimple circle in the hexagonal array.
참고문헌 (14)
- Nakada, M., "Trends in engine technology and tribology", Tribology International, 27(1), pp.3~8 (1994)
- Cho, M. H., "Micro CNC surface texturing on Polyoxymethylene(POM)and its tribological performance in lubricated sliding", Tribology International, 44, pp.859~867 (2011)
- An analysis of friction reduction techniques for the direct-acting valve train system of a new-generation lightweight 2-Liter V6 Nissan engine, "Kato, A.", SAE, ~, pp.Paper No. 940992 (1994)
- Ronen, A., "Friction-reducing surface texturing in reciprocating automotive components", Tribology Transaction, 44(3), pp.359~366 (2001)
- Hamilton, D. B., "A theory of lubrication by micro-irregularities", J. of Basic Engineering, March, pp.177~185 (1966)
- Kim, D. H., "Anisotropic tribological properties of the coating on a magnetic recording disk", Thin Solid Films, 360, pp.187~194 (2000)
- Etsion, I., "Analytical and Experimental investigation of laser-textured mechanical seal faces", Tribology Transactions, 42(3), pp.511~516 (1999)
- Wang, X., "The lubrication effect of micro-pits on parallel sliding faces of SiC in water", Lubrication Engineering, pp.27~34 (2002)
- W. S. Choi, "Friction characteristics of hexagonal array micro scale dimple pattern by density", J. Korean Soc. Tribol. Lubr. Eng, 21(6) (2008)
- Scaraggi, M., "Minimize Friction of Lubricated Laser-Microtextured-Surface by Tuning Microholes Depth", Tribology International, 75, pp.123~127 (2014)
- Wakuda, M., "Effect of surface texturing on friction reduction between ceramic and steel materials under lubricated sliding contact", Wear, 254, pp.356~363 (2003)
- Jacobson, B., "The stribeck memorial lecture", Tribology International, 36, pp.781~789 (2003)
- Woydt, M., "The history of the Stribeck curve and ball bearing steels : The role of Adolf Martens", Wear, 268, pp.1542~1546 (2010)
- Yuriko, K., "Ionic Liquids - New Aspects for the Future" (2013), InTech