Dry sliding wear behaviour of Mg-Si alloys

► Wear rate of Mg-Si alloys reduced with increase in Si content. ► Wear resistance decreases with increase in load. ► Hypoeutectic Mg-Si alloys adhesive wear followed by oxidation play a major role. ► Hypereutectic Mg-Si alloys up to about 6 wt% Si delamination wear dominate. ► Above 6 wt% Si abrasion wear is the main mechanism.