METHODS OF REDUCING SURFACE ROUGHNESS AND IMPROVING OXIDE COATING THICKNESS UNIFORMITY FOR ANODIZED ALUMINUM-SILICON ALLOYS

摘要

In one exemplary method, an anodized aluminum-silicon alloy work piece may be formed from an aluminum-silicon alloy substrate material by applying a friction stir processing treatment to the aluminum-silicon alloy substrate material to reduce an average particle size of a plurality of silicon particles contained within the substrate material while increasing a size uniformity of the plurality of silicon particles, and subsequently anodizing said aluminum-silicon alloy substrate material.