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

Abstract

Friction and wear tests were performed on AISI 1045 steel specimens with different initial roughness parameters, machined by a creep-feed dry grinding process, to study the friction and wear behavior on a pin-on-disc tester in dry sliding conditions. Average surface roughness (Ra), root mean square (Rq), skewness (Rsk) and kurtosis (Rku) were involved in order to analyse the influence of the friction and wear behavior. The observations reveal that a surface with initial roughness parameters of higher Ra, Rq and Rku will lead to a longer initial-steady transition period in the sliding tests. The plastic deformation mainly concentrates in the depth of 20–50 μm under the worn surface and the critical plastic deformation is generated on the rough surface. For surfaces with large Ra, Rq, low Rsk and high Rku values, it is easy to lose the C element in, the reciprocating extrusion.

Investigation of the effects of skewness Rsk and kurtosis Rku on tribological behavior in a pin-on-disc test of surfaces machined by conventional milling and turning processes

“…In addition, on T13 curve has the longest running-in time (up to 900 revolutions) than in F18 (up to 550 revolutions). This leads to the hypothesis that R sk has an influence on the time required for the friction coefficient to reach the steady state 16 . In curves T18 and F13 the interpretation approaches the typical friction curve between metals [1][2][3]6 , with a gradual growth in friction resulting from the great interaction between the roughness and impurities present at the interface.…”

“…In some cases, small changes in the machining process can be masked by this parameter. Thus, it is recommended to use the quadratic arithmetic average R q 12,15,16 . According to García-Jurado et al 13 and Sedlaček et al 17 , R q is similar to R a , does not differentiate peaks and valleys, but amplifies (squared) occasional deeper asperities.…”

“…Therefore, parameters are needed to describe how the asperities are distributed along the roughness profile 9,10,17 . In the study by Liang et al 16 , the surface of six samples of AISI 1045 steel were prepared by dry grinding in order to obtain different roughnesses (R a , R q , R sk and R ku ). Friction and wear were assessed using the ball-on-disc test equipped with a GGr15 steel ball.…”

A Sustainable and Eco‐Friendly Polymer Based Graphene Oxide Nanocomposite Anti‐Corrosion Coating on Mild Steel

“…The low roughness value of GIVO‐0.4 % GO coated samples suggest the uniform distribution of GO in the polymer matrix formed on MS. Since the surface roughness has much influence on coating adhesion and wear resistance, the decrease in surface roughness leads to good wear resistance and adhesion property of the coating . The decreased surface roughness reduces the local corrosion and it also reduces the hydrophilic nature of the surface and hence decreases the surface contact between the aggressive solution and coated surface …”

Wear comparison of unstructured and structured tungsten carbide

“…It has been established that Ra and Rq is linked to the friction and wear stabilisation. 26 It was explained by Liang et al 26 that for a surface with the higher value of Ra and Rq, the friction and wear behaviour reach more quickly to their steady-state stage. Figure 11 reveals that the surface structuring has increased the roughness value, which has facilitated in early wear stabilisation.…”