Abstract
Abstract As-cast A356 aluminum alloy processed by friction stir processing at various rotation rates was subjected to microstructural analysis and dry sliding wear tests. Friction stir processing resulted in a significant microstructural modification and improvement in wear behavior of A356. Wear resistance improvement was attributed to significant modification in size, morphology and distribution of Si particles, grain refinement, and hardness enhancement. Furthermore, it was found that higher tool rotation rates were more effective to refine microstructure and consequently increase wear resistance.
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