Subsurface deformation and the role of surface texture—A study with Cu pins and steel plates

Abstract

The extent of subsurface deformation below the worn surface influences friction and transfer layer formation during sliding. Thus, in this study, the extent of plastic deformation and strain localization events that occur at various depths beneath the worn surface in the subsurface zones of Cu pins slid against steel plate with various surface textures have been determined using simple metallographic techniques. Results showed that the magnitude of plastic strain gradient and the depth of highly deformed zone depend on both coefficient of friction and transfer layer formation, which in-turn depends on the surface texture of harder counterface, under both dry and lubricated conditions. In addition, it was seen that the gradient of equivalent strain, as it approached the worn surface, was higher under dry conditions when compared to that under lubricated conditions.

Variations in strain affect friction and microstructure evolution in copper under a reciprocating tribological load

“…We can only speculate why the grains in the subsurface area for A r = 0.4 are at a preferential angle towards to sliding surface. In the literature, a similar phenomenon was described for pin-on-disc experiments [18,19,21,42]. Even though these authors offer different reasons for a grain orienting and bending, the observation itself can easily be rationalized for such unidirectional sliding tests.…”

Influences of graphite reinforcement on the tribological properties of self-lubricating aluminum matrix composites for green tribology, sustainability, and energy efficiency—a review

“…In general, a wear surface can be divided into three different zones: the undisturbed base material, the deformed intermediate region of the base material, and the worn surface that usually contains counterface material [53,54]. These three zones are schematically shown in Fig.…”

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

“…Other publications reported similar deformations caused by plastic flow in the surface of steels, such as the ball impact test on plastic steels [ 18 ], and steel cutting operations [ 19 , 20 , 21 ]. It was also found that the surface texture influences the plastic deformation in ductile materials after sliding [ 22 ]. M. Sedlacek et al [ 23 ] investigated the correlation between surface roughness parameters and friction and found that the surfaces with higher kurtosis and negative skewness values tend to reduce friction.…”