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.
Volume Subject Area:
Engineered Surfaces
Topics:
Boundary lubrication,
Friction,
Pressure,
Etching,
Geometry,
Lithography,
Sliding friction,
Steel,
Stress,
Wear
This content is only available via PDF.
Copyright © 2007
by ASME
You do not currently have access to this content.