Influence of surface topography on torsional fretting wear under flat-on-flat contact

Abstract

Influence of surface topography on torsional fretting under flat-on-flat contact were investigated. Contact surfaces of the lower specimens were prepared by milling with different initial surface roughness while the upper specimens were polished. Results indicate that with the increase of surface roughness, friction torque and accumulated dissipated energy present a first increase and then decrease tendency and are higher when the texture is perpendicular to the relative movement direction. The wear volume and wear rate present increasing and decreasing tendencies separately for textures parallel and perpendicular to the relative movement direction, and they are higher when the texture is parallel to the relative movement direction. The results can provide guidance for the initial surface design to reduce fretting wear.

An Investigation of the Influence of Initial Roughness on the Friction and Wear Behavior of Ground Surfaces

“…A. Dzierwa [ 25 ] found that the initial surface topography has a significant influence on friction and wear levels under dry sliding conditions. W. L. Lu et al [ 26 ] implied that the friction torque varies nonlinearly with the increase of surface roughness and surface roughness shows the opposite influence on wear under two different texture directions. Moreover, different topographies can also affect the tribological behavior due to the various contact mechanics.…”

Torsional Fretting Wear Behavior of PVD TiCN Coated CuNiAl Blade Bearing in Oil and Artificial Seawater

“…As in our previous studies [22,23], the 42CrMo4 and CuNiAl were chosen for the upper and lower specimens, respectively. The contact between the blade carrier and the hub is a full ring contact at the inner radial part (Figure 1) and the fretting can be simulated by applying a normal load over the small-amplitude reciprocating rotation friction pair (Figure 2(a)).…”

Torsional fretting and torsional sliding wear behaviors of CuNiAl against 42CrMo4 under dry condition

“…The fretting and sliding tests were evaluated on a flat on flat contact torsional wear test rig, which has been described in detail in previous research papers [15] ; [16]. Basically, a closed-loop control step motor (resolution of rotational angle, 0.018°) was used to drive the relative movement between the upper and lower specimens.…”

“…In torsional fretting studies, the friction torque versus angular displacement amplitude curves (T-θ curves) are very important as firstly they can reflect the fretting running state, namely partial slip, mixed slip or gross slip. Secondly, by calculating the amplitude of each Tθ curve, which represents the friction torque of a fretting cycle, the friction torque for the whole fretting process can be depicted [15]. Fig.…”