Predicting Sliding Wear Behaviour of a Tin-Based White Metal Under Varying Pressure and Speed Conditions

Abstract

Abstract

To determine the effects of loading on the sliding wear behaviour of a tin-based white bearing metal JIS WJ2, experiments were performed over a range of pressures and speeds. A linear relation between stress and cut-off life was obtained on the log-log plot at constant shaft speed. These relations were expressed as different straight lines on the log-log plot, which depend on the shaft speed. However, there is a unique curve in the relation, frictional stress versus cut-off life, regardless of the shaft speeds.

To establish a quantitative method of analysing the steady-state sliding wear mode, the following constitutive relation was proposed

dw/dN = A(τ – τ_th)²

where w is the amount of wear, N the number of shaft rotations, A the material constant, τ the interfacial shear stress, and τ_th the threshold level for wear damage. The aforementioned equation has been used as a basis for estimating wear life. Good agreement between the predictions and the experimental results was obtained.