Patent ID: 9180554
Filing Date: 2015-11-10
Classification: B23K,C22C,C22F

Abstract:
1. An aluminum alloy member comprising an aluminum alloy sheet having ends joined by friction stir welding, a weld front surface or a weld back surface being anodically oxidized, the aluminum alloy member further comprising 0.3-1.5 mass % of Mg, 0.2-1.2 mass % of Si, no more than 0.5 mass % of Cu, no more than 0.2 mass % of Fe, with the balance being Al and unavoidable impurities and Fe-containing second phase particles having a particle size of more than 1 μm among second phase particles disposed in a matrix of the aluminum alloy member having an average particle size of no more than 5 μm, wherein the weld front surface is a weld surface into which a rotating pin is inserted during friction stir welding and the weld back surface is a surface opposite to the weld front surface.