Wrought and cast aluminum alloy with improved resistance to mechanical property degradation

摘要

Aluminum-based alloys for casting or wrought processing having improved combinations of properties, including improved high temperature strength, are provided. The alloys generally comprise copper, magnesium, silver, and titanium, along with scandium and/or cobalt. Zirconium, zinc, and/or vanadium may also optionally be present in the alloy. When cobalt is present in the alloy, nickel may also optionally be present. Cast and wrought products, as well as methods of making the same using the alloys, are also disclosed.

主权项

1. An aluminum-based alloy comprising:
4 to 6% by weight Cu; 0.2 to 1% by weight Mg; 0.1 to 1.5% by weight Ag; 0.15 to 0.35% by weight Ti; 0.25 to 1.5% by weight Co; 0.05 to 1% by weight Zn; less than 0.05% by weight Mn; optionally 0.1 to 0.2% by weight Zr; and balance aluminum and incidental elements and impurities, said % by weight being based upon the total weight of the alloy taken as 100% by weight, wherein said alloy is substantially free of Si.