The effect of dimple size on sliding friction conducted under boundary lubrication conditions using a four-ball wear tester was investigated. The contact geometry used was a ball-on-three-flats arrangement using 52100 steel balls and flats. Circular dimples of various diameters (20–60 μm) and depth (2.5–10 μm) were fabricated using micro-lithography followed by electrochemical etching. Tests were conducted from 98–296N loads and 0.2–1.3 m/s speeds. Results suggest that smaller dimples with shallower depth achieve higher level of friction reduction under these test conditions.
- Tribology Division
The Effects of Dimple Size and Depth on Friction Reduction Under Boundary Lubrication Pressure
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Wang, X, Zhang, H, & Hsu, S. "The Effects of Dimple Size and Depth on Friction Reduction Under Boundary Lubrication Pressure." Proceedings of the ASME/STLE 2007 International Joint Tribology Conference. ASME/STLE 2007 International Joint Tribology Conference, Parts A and B. San Diego, California, USA. October 22–24, 2007. pp. 909-911. ASME. https://doi.org/10.1115/IJTC2007-44235
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