Aluminum-lithium alloys and method

Details Aluminum-lithium alloys and method Aluminum-lithium alloys and method

1984-03-29

1987-03-10

Dean, R.

Metal treatment

Compositions

Heat treating

148415, 148416, 148417, C22F 104

Patent

active

046489134

ABSTRACT:
An aluminum base alloy wrought product suitable for aging and having the ability to develop improved strength in response to an aging treatment without impairing fracture toughness properties is disclosed. The product is comprised of 0.5 to 4.0 wt. % Li, 0 to 5.0 wt. % Mg, up to 5.0 wt. % Cu, 0 to 1.0 wt. % Zr, 0 to 2.0 wt. % Mn, 0 to 7.0 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 an aging step, a working effect equivalent to stretching an amount greater than 3% in order that, after said aging, improved strength and fracture toughness combinations are obtained.

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