Aluminum-lithium alloys and method of making the same

Details Aluminum-lithium alloys and method of making the same Aluminum-lithium alloys and method of making the same

1989-06-19

1991-11-19

Dean, R.

Metal treatment

Compositions

Heat treating

148415, 148416, 148417, 148437, 148438, 148439, 148440, 420532, C22F 104

Patent

active

050663429

ABSTRACT:
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.

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"Microstructure and Toughness of High Strength Aluminum Alloys" by J. T. Staley, ASTM STP 605, pp. 71-103.

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