Wear of Carbon Steel (0.65%C) in Rolling-Sliding Contact with Creep Ratio

Abstract

In rolling-sliding contact, wear will occur when the accumulated plastic shear strain of the material at the surface exceeds its critical shear strain for failure. During rolling-sliding contact, the difference in relative velocities of two contacting components can cause slip in the contact (known as creep). The higher creep ratio may increase the severity of wear. In this work, the wear rate of the material and the behaviour of material just below the contact surface in rolling-sliding contact with various creep ratios were investigated. The carbon steel (about 0.65% C) was chosen as the test material and wear test was conducted using disc-to-disc contact testing machine with the maximum contact pressure of 1000 MPa and with various creep ratio of 1%, 5% and 7%. The results show the higher creep ratio causes the material to accumulate critical shear strain more quickly, resulting in the increase of wear (i.e., from about 0.0047μm/cycle for creep ratio of 1% up to about 0.0077μm/cycle for creep ratio of 7%). .