Friction Characteristics for Density of Micro Dimples under Hydrodynamic Lubrication

Surface texturing of tribological application is another attractive technology of friction reducing. Also,reduction of friction is therefore considered to be a necessary requirement for improved efficiency of machine.In this paper attempts to investigate the effect of density for micro-scale dimple pattern using photoli- thography on bearing steel flat mated with pin-on-disk.We demonstrated the lubrication mechanism for a Stribeck curve,which has a relationship between the friction coefficient and a dimensionless parameter for lubrication condition.It is found that friction coefficient is depended on the density of surface pattern.It was thus verified that micro-scale dimple could affect the friction reduction considerably under mixed and hydrody- namic lubrication conditions from based on friction map.Lubrication condition regime has an influence on the friction coefficient induced the density of micro dimple.