Abstract
In the present work, the Al-21Si-0.8Mg-1.5Cu-0.5Mn alloys composite modified by P+RE was prepared by metal mold casting. The tribological properties against steel under lubrication conditions were experimentaled. The wear morphology characteristics and subsurface microstructure was characterized by means of optical microscope and scanning electron microscope. The effects of Si particle morphology, size, quantity and distribution on tribological properties were investigated. The wear mechanism based on lubricant abrasion was discussed. The results show that the wear mechanism of experimental alloy are mainly abrasire wear and fatigue spalling.
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