Tribological behavior of an ultrahigh molecular weight polyethylene in lubricated environments

Abstract

The wear and friction performance of GUR 1020 grade ultrahigh molecular weight polyethylene (UHMWPE) polymer was studied in distilled water, HASS (Hank's balanced salt solution) and several protein lubrication environments. Wear tests were carried out using polymer pin-on AISI 304L stainless steel disc apparatus. Tests conditions were room temperature, 40N, 80N and 120N applied loads and 0.5 m/s sliding speed. For the range of load and speed value of this work, the coefficient of friction and wear rate for UHMWPE polymer decreases with the increase in applied load values. The coefficient of friction is highest and the specific wear rate values is lowest under HASS +HA solution lubricant. The average specific wear rate values for UHMWPE polymer under distilled water and HASS+HA (Hank's balanced salt solution with Hyaluronic acid) lubrication conditions are in the order of 9 × 10-15 m2/N and 3 × 10-15 m2/N respectively. The wear mechanism includes abrasion and adhesive processes.