Tribology Characteristics in 200 μm of Hexagonal Array Dimple Pattern

W. S. Choi; Angga S. H.; S. H. Kwon; S. G. Kwon; J. M. Park; J. S. Kim; S. W. Chung; Y. H. Chae

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자료유형: 학술저널

저자정보: W. S. Choi (Pusan National University) Angga S. H. (Pusan National University) S. H. Kwon (Pusan National University) S. G. Kwon (Pusan National University) J. M. Park (Pusan National University) J. S. Kim (Pusan National University) S. W. Chung (Pusan National University) Y. H. Chae (Kyungpook National University)

저널정보: 한국트라이볼로지학회 Tribology and Lubricants 윤활학회지 제31권 제2호

발행연도: 2015.4

수록면: 50 - 55 (6page)

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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.

#friction coefficient #surface texturing #dimple pattern #stribeck

참고문헌 (14)

참고문헌 신청

Nakada, M. / 1994 / Trends in engine technology and tribology / Tribology International 27(1):3~8

Cho, M. H. / 2011 / Micro CNC surface texturing on Polyoxymethylene(POM)and its tribological performance in lubricated sliding / Tribology International 44:859~867

Kato, A. / 1994 / An analysis of friction reduction techniques for the direct-acting valve train system of a new-generation lightweight 2-Liter V6 Nissan engine

Ronen, A. / 2001 / Friction-reducing surface texturing in reciprocating automotive components / Tribology Transaction 44(3):359~366

Hamilton, D. B. / 1966 / A theory of lubrication by micro-irregularities / J. of Basic Engineering, March :177~185

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