Friction and wear behavior of Mg–11Y–5Gd–2Zn–0.5Zr (wt%) alloy with oil lubricant

The sliding friction and wear behaviors of Mg–11Y–5Gd–2Zn–0.5Zr (wt%) alloy were investigated under oil lubricant condition by pin-on-disk configuration with a constant sliding distance of 1,000 m in the temperature range of 25–200 °C. Results indicate that the volumetric wear rates and average friction coefficients decrease with the increase of sliding speeds, and increase with the increase of test temperature below 150 °C. The hard and thermally stable Mg12(Y,Gd)Zn phase with long-period stacking order structure in the alloy presents significant wear resistance. The wear mechanism below 100 °C is abrasive wear as a result of plastic extrusion deformation. The corporate effects of severe abrasive, oxidative, and delaminating wear result in the tribological mechanism above 100 °C.