Aluminum-lithium alloys having improved corrosion resistance con

Details Aluminum-lithium alloys having improved corrosion resistance con Aluminum-lithium alloys having improved corrosion resistance con

1988-03-24

1990-10-09

Dean, R.

Metal treatment

Compositions

Heat treating

148417, C22F 104

Patent

active

049617923

ABSTRACT:
An aluminum base alloy wrought product having improved corrosion resistance in addition to combinations of strength and toughness. The product comprises 0.2 to 5.0 wt. % Li, 0.05 to 6.0 wt. % Mg, at least 2.45 wt. % Cu, 0.05 to 0.16 wt. % Zr, 0.05 to 12 wt. % Zn, 0.5 wt. % max. Fe, 0.5 wt. % max. Si, the balance aluminum and incidental impurities and has the ability to develop improved combinations of strength and toughness in response to an aging treatment. Prior to an aging step, the product having imparted thereto a working effect equivalent to stretching so that after an aging step it has improved combinations of strength and toughness.

REFERENCES:
patent: 2915390 (1959-12-01), Criner
patent: 4094705 (1978-06-01), Sperry et al.
patent: 4571272 (1986-02-01), Grimes
patent: 4582544 (1986-04-01), Grimes et al.
patent: 4603029 (1986-07-01), Quist et al.
patent: 4626409 (1986-12-01), Miller
patent: 4636357 (1987-01-01), Peel et al.
patent: 4648913 (1987-03-01), Hunt, Jr. et al.
"Microstructure and Toughness of High Strength Aluminum Alloys" by J. T. Staley, ASTM STP605, pp. 71-103.

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