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US 5,066,342 AGranted
Aluminum-lithium alloys and method of making the same
AssigneeAluminum Company of America
InventorsRoberto J. Rioja, Joel A. Bowers, R. Steve James
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AssigneeAluminum Company of America
InventorsRoberto J. Rioja, Joel A. Bowers, R. Steve James
Estimating the term…
An aluminum base alloy wrought product having an isotropic texture and a process for preparing the same is disclosed. The product has the ability to develop improved properties in the 45.degree. direction or more uniform properties throughout the thickness and in the short transverse direction in response to an aging treatment and is comprised of 0.2 to 5.0 wt. % Li, 0.05 to 6.0 wt. % Mg, at least 2.45 wt. % Cu, 0.1 to 1.0 wt. % Mn, 0.05 to 12 wt. % Zn, 0.5 wt. % max. Fe, 0.5 wt. % max. Si, the balance aluminum and incidental impurities. The product has imparted thereto, prior to a hot rolling step, a recrystallization effect to provide therein after hot rolling a metallurgical structure generally lacking intense work texture characteristics. After an aging step, the product has improved levels of properties in the 45.degree. direction or more uniform properties throughout the thickness and in the short transverse direction.
A method of making lithium containing aluminum base flat rolled products having improved corrosion resistance and having improved toughness properties for plate and improved anisotropy for sheet, the method comprising the steps of:
An aluminum base alloy suitable for forming into a wrought product having improved combinations of strength and fracture toughness, the alloy consisting of 1.8 to 2.5 wt. % Li, 0.2 to 2.0 wt. % Mg, 2.5 to 2.9 wt. % Cu, 0.1 to 0.7 wt. % Mn, 0.2 to 2.0 wt. % Zn, 0.5 wt. % max. Fe, 0.5 wt. % max. Si, Mg and Zn maintained in a ratio of 0.1 to 1, the balance aluminum and incidental impurities.
A method of making lithium containing aluminum base flat rolled products having improved corrosion resistance and having improved toughness properties for plate and improved anisotropy for sheet, the method comprising the steps of:
A method of making lithium containing aluminum base flat rolled products having improved corrosion resistance and having improved toughness properties for plate and improved anisotropy for sheet, the method comprising the steps of:
An aluminum base alloy flat rolled product having improved corrosion resistance and having the ability to develop improved toughness properties for plate and improved anisotropy for sheet, the the product consisting essentially of 0.2 to 5.0 wt. % Li, 0.05 to 6.0 wt. % Mg, at least 2.45 wt. % Cu, 0.1 to 1.0 wt. % Mn, 0.05 to 6.0 wt. % Zn, 0.5 wt. % max. Fe, 0.5 wt. % max. Si, at least one of the elements selected from the group Cr, V, Hf, Zr, Ti, Sc and Ce with Cr, V, Zr, Ti and Sc in the range of 0.01 to 0.2 wt. %, Hf up to 0.6 wt. % and Ce in the range of 0.01 to 0.5 wt. %, Mr and Zn maintained in a ratio in the range of 0.1 to less than 1, the balance substantially aluminum, incidental elements and impurities, the product having said improved levels of properties in the aged condition.
An aluminum base alloy wrought product having improved corrosion resistance and having the ability to form a recrystallized intermediate product after low temperature hot working and a substantially unrecrystallized structure after being solution heat treated, the product consisting essentially of 0.2 to 5.0 wt. % Li, 0.05 to 2.0 wt. % Mg, at least 2.45 wt. % Cu, 0.1 to 1.0 wt. % Mn, 0.05 to 2.0 wt. % Zn, 0.5 wt. % max. Fe, 0.5 wt. % max. Si, at least one of the elements selected from the group Cr, V, Hf, Ti, Zr, Sc and Ce, with Cr, V, Ti, and Sc and Zr in the range of 0.01 to 0.5 wt. %, Mg and Zn maintained in a ratio in the range of 0.1 to less than 1, the balance substantially aluminum, incidental elements and impurities, the product having improved toughness properties for plate and improved anisotropy for sheet in the aged condition.
An aluminum base alloy wrought product having improved corrosion resistance and having the ability to form a recrystallized intermediate product after low temperature hot working and a substantially unrecrystallized structure after being hot worked and solution heat treated, the product consisting essentially of 1.8 to 2.5 wt. % Li, 0.2 to 2.0 wt. % Mg, 2.5 to 2.9 wt. % Cu, 0.1 to 0.8 wt. % Mn, up to 0.10 wt. % Zr, 0.2 to 2.0 wt. % Zn, 0.5 wt. % max. Fe, 0.5 wt. % max., Si, Mg and Zn maintained in a ratio in the range of 0.1 to less than 1, the balance substantially aluminum, incidental elements and impurities, having improved toughness properties for plate and improved anisotropy for sheet in the aged condition.
Dependencies are inferred from the claim text.