Aluminum magnesium alloy product containing dispersoids
AssigneeAluminum Company of America
InventorsStephen F. Baumann, Edward L. Colvin, Robert W. Hyland, Jr., Jocelyn I. Petit
Life of this patent
Estimating the term…
Abstract
An aluminum alloy product for use as a damage tolerant product for aerospace applications, including fuselage skin stock. The aluminum alloy composition contains about 3-7 wt % magnesium, about 0.03-0.2 wt % zirconium, about 0.2-1.2 wt % manganese, up to 0.15 wt % silicon and about 0.05-0.5 wt % of a dispersoid-forming element selected from the group consisting of: scandium, erbium, yttrium, gadolinium, holmium and hafnium, the balance being aluminum and incidental elements and impurities.
Claims101
An aluminum alloy product comprising an alloy composition which is substantially zinc-free and lithium-free, and includes about 3-7 wt % magnesium, about 0.05-0.2 wt % zirconium, about 0.2-1.2 wt % manganese, up to 0.15 wt % silicon and about 0.05-0.5 wt % of a dispersoid-forming element selected from the group consisting of:
- scandium, erbium, yttrium, gadolinium, holmium and hafnium, the balance being aluminum and incidental elements and impurities.
A damage tolerant, aerospace part having low density, good corrosion resistance and a good combination of strength and toughness, said aerospace part being made from an alloy composition which is substantially zinc-free and lithium-free, and includes:
- about 3-7 wt % magnesium;
- about 0.05-0.2 wt % zirconium;
- about 0.2-1.2 wt % manganese;
- up to 0.15 wt % silicon;
- and about 0.05-0.5 wt % of a dispersoid-forming element selected from the group consisting of:
- scandium, erbium, yttrium, gadolinium, holmium and hafnium, the balance being aluminum and incidental elements and impurities.
A damage tolerant airplane component part having low density and good corrosion resistance, strength and toughness properties, said component part consisting essentially of an alloy composition which is substantially zinc-free and lithium-free, and includes about 3-7 wt % magnesium, about 0.05-0.2 wt % zirconium, about 0.2-1.2 wt % manganese, up to 0.15 wt % silicon and about 0.05-0.5 wt % of a dispersoid-forming element selected from the group consisting of:
- scandium, erbium, yttrium, gadolinium, holmium and hafnium, the balance being aluminum and incidental elements and impurities.
Airplane fuselage skin stock having a good combination of strength toughness and corrosion resistance properties, said fuselage skin stock made from an alloy composition which is substantially zinc-free and lithium-free, and consists essentially of:
- about 3-7 wt % magnesium;
- about 0.05-0.2 wt % zirconium;
- about 0.2-1.2 wt % manganese;
- up to 0.15 wt % silicon;
- and about 0.05-0.5 wt % of a dispersoid-forming element selected from the group consisting of:
- scandium, erbium, yttrium, gadolinium, holmium and hafnium, the balance being aluminum and incidental elements and impurities.
A damage tolerant, aerospace lower wing section having a good combination of strength, toughness and corrosion resistance, said lower wing section made from an alloy composition which is substantially zinc-free and lithium-free, and consists essentially of:
- about 3-7 wt % magnesium;
- about 0.05-0.2 wt % zirconium;
- about 0.2-1.2 wt % manganese;
- up to 0.15 wt % silicon;
- and about 0.05-0.5 wt % of a dispersoid-forming element selected from the group consisting of:
- scandium, erbium, yttrium, gadolinium, holmium, and hafnium, the balance being aluminum and incidental elements and impurities.
A damage tolerant, airplane stringer having a good combination of strength, toughness and corrosion resistance, said stringer made from an alloy composition which is substantially zinc-free and lithium-free, and consists essentially of:
- about 3-7 wt % magnesium;
- about 0.05-0.2 wt % zirconium;
- about 0.2-1.2 wt % manganese;
- up to 0.15 wt % silicon;
- and about 0.05-0.5 wt % of a dispersoid-forming element selected from the group consisting of:
- scandium, erbium, yttrium, gadolinium, holmium and hafnium, the balance being aluminum and incidental elements and impurities.
A damage tolerant, aerospace pressure bulkhead having a good combination of strength, toughness and corrosion resistance, said pressure bulkhead made from an alloy composition which is substantially zinc-free and lithium-free, and consists essentially of:
- about 3-7 wt % magnesium;
- about 0.05-0.2 wt % zirconium;
- about 0.2-1.2 wt % manganese;
- up to 0.15 wt % silicon;
- and about 0.05-0.5 wt % of a dispersoid-forming element selected from the group consisting of:
- scandium, erbium, yttrium, gadolinium, holmium and hafnium, the balance being aluminum and incidental elements and impurities.
Dependencies are inferred from the claim text.