Effects of the strain rate of prior deformation on the wear–corrosion synergy of carbon steel
By Yin, Songbo; Li, D.Y. & Bouchard, R.
Published in Wear
2007
Abstract
Wear of materials in corrosive environments is encountered in many industries, which has attracted considerable interest in recent years. Previous studies have demonstrated that the wear–corrosion synergy can be significantly influenced by the strain rate. In this study, using an electrochemical sliding wear technique, we investigated effects of the strain rate of prior deformation on the wear–corrosion synergy of AISI 1045 steel in a dilute sodium chloride solution. Various strain rates of prior deformation in the range from 7.5 X 10-4 to 2 s-1 were chosen for this study. Contributions of individual factors to the total wear loss, including pure wear, pure corrosion, and the corrosion–wear synergy, were determined. In particular, effects of the strain rate of prior deformation on the additional corrosion caused by wear and additional wear caused by corrosion, which are two components of wear–corrosion synergy, were investigated. It was observed that at high strain rates, these two components of the wear–corrosion synergy were markedly enhanced, which was largely attributed to the material deterioration with defects such as microcracks generated by deformation at high strain rates. The experimental results are explained based on changes in surface microstructure and corresponding electrochemical and mechanical properties against the strain rate of prior deformation.