High strength L12 aluminum alloys

An aluminum alloy having high strength, ductility, corrosion resistance and fracture toughness, comprising:

• at least one of nickel, iron, and chromium;
• at least one first element selected from the group comprising:
• about 0.1 to about 4 weight percent scandium, about 0.1 to about 20 weight percent erbium, about 0.1 to about 15 weight percent thulium, about 0.1 to about 25 weight percent ytterbium, and about 0.1 to about 25 weight percent lutetium;
• at least one second element selected from the group comprising:
• gadolinium, yttrium, zirconium, titanium, hafnium, and niobium;
• and
• the balance substantially aluminum.

A method of forming an aluminum alloy having high strength, ductility and toughness, the method comprising:

• (a) forming an alloy powder comprising:
• at least one of about 4 to 25 weight percent of nickel, about 1.5 to about 20 weight percent of iron, and about 1 to about 20 weight percent chromium;
• at least one first element selected from the group comprising:
• about 0.1 to about 4 weight percent scandium, about 0.1 to about 20 weight percent erbium, about 0.1 to about 15 weight percent thulium, about 0.1 to about 25 weight percent ytterbium, and about 0.1 to about 25 weight percent lutetium;
• at least one second element selected from the group comprising:
• about 2 to about 30 weight percent gadolinium, about 2 to about 30 weight percent yttrium, about 0.5 to about 5 weight percent zirconium, about 0.5 to about 10 weight percent titanium, about 0.5 to about 10 weight percent hafnium, and about 0.5 to about 5 weight percent niobium;
• and
• the balance substantially aluminum;
• (b) treating the alloy powder with a rapid solidification process to form an amorphous phase aluminum alloy having at least one of about 4 to about 25 weight percent of nickel, about 1.5 to about 20 weight percent iron, and about 1 to about 20 weight percent chromium;
• and
• a coherent L12 phase having about 4 to about 25 weight percent of nickel, about 1.5 to about 20 weight percent of iron, and about 1 to about 20 weight percent chromium;
• at least one first element selected from the group comprising:
• about 0.1 to about 4 weight percent scandium, about 0.1 to 20 weight percent erbium, about 0.1 to 15 weight percent thulium, about 0.1 to 25 weight percent ytterbium, and about 0.1 to 25 weight percent lutetium;
• and
• at least one second element selected from the group comprising:
• about 2 to 30 weight percent gadolinium, about 2 to 30 weight percent yttrium, about 0.5 to 5 weight percent zirconium, about 0.5 to 10 weight percent titanium, about 0.5 to about 10 weight percent hafnium, and about 0.5 to about 5 weight percent niobium.