Friction and scratch characteristics of textured and rough surfaces using the quasi-continuum method
A.-S. Tran, T.-H. Fang, L.-R. Tsai and C.-H. Chen
Journal of Physic and Chemistry of Solids, 126, 180-188 (2019).
ABSTRACT
In this article, the friction and scratch characteristics of textured and rough
surfaces of pure aluminum were studied using the quasi-continuum method. The
surface profile of pure aluminum was altered with regular arrangements (bumps)
and irregular arrangements (random surface roughness) along two orientations
x[110] and y[001]. The surface smoothness and the internal strain of the
material were studied through the scratching process. The effects of the ratio
of the bump width to the bump pitch (W/P), scratching depth, average surface
roughness (Eta) and indenter radius were examined. The results indicated that
the surface smoothness was affected by the W/P ratio. Upon increasing the W/P
ratio, the internal strain of the material became more intense. The greater Ra
value the more severe impact. The coefficient of friction was found to be
proportional to the scratching depth and indenter radius values. A scratching
depth of 15 angstrom is suggested for optimal surface smoothness.