Effect of displacement amplitude on fretting wear of 304 stainless steel in air and sea water

Abstract

The fretting wear behaviours of 304 stainless steel at different displacement amplitudes were investigated by using a SRV‐IV fretting tester in air and sea water, respectively. In air, the friction coefficient as well as the fretting damage of 304 stainless steel increased with the increase of displacement amplitude, and the fretting regime changed from partial slip regime to gross slip regime. Correspondingly, the wear mechanisms transformed from local fatigue and slight oxidation to the combination damages of adhesion wear, abrasive wear, and oxidation. Compared with the dry friction conditions, sea water had a strong effect on fretting behaviour of 304 stainless steel. Adhesion wear was effectively suppressed due to the cooling and lubrication effect of sea water. Therefore, friction coefficient and wear depth decreased significantly. And the damages of 304 stainless steel in sea water were mainly caused by abrasive wear, slight adhesion wear, and corrosion wear.

Effect of load on the fretting behavior of SAF 2507 super duplex stainless steel in air and sea water

“…Under the lubrication of sea water, corrosion occurrs on the wear scar and then destroys the protective film; besides, the corrosive compounds are easier to form than the oxides due to the high concentration of ions of sea water (Cui et al, 2012). The corresponding reaction are given as the following equations (Fan et al, 2018):…”