Aluminum-lithium alloys having high zinc

Details Aluminum-lithium alloys having high zinc Aluminum-lithium alloys having high zinc

1990-09-26

1992-08-04

Dean, B.

Alloys or metallic compositions

Aluminum base

Copper containing

148417, 148418, 148439, 420535, 420539, C22C 2106

Patent

active

051357135

ABSTRACT:
An aluminum base alloy suitable for forming into a wrought product having improved combinations of strength and fracture toughness is disclosed. The product is comprised of 0.2 to 3.0 wt. % Li, 0.1 to 3 wt. % Mg, 0.2 to 3 wt. % Cu, 5.1 to 12 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, Mn, Ti, Ag, In and Zr, with Cr, V, Ti and Zr in the range of 0.01 to 0.2 wt. %; Hf and Mn up to 0.6 wt. % each, Ag in the range of 0.05 to 1 wt. % and in the range of 0.01 to 0.5 wt. %, the balance aluminum and incidental impurities.

REFERENCES:
patent: 4869870 (1989-09-01), Rioja et al.
patent: 4961792 (1990-10-01), Rioja et al.
Baba Yoshios: "Effects of Additional Elements and Heat Treatments on the Fracture Characteristics of Al-Zn-Mg Alloy,", J. Japan Inst. Metals (Trans. JIM): 1970, vol. 11, No. 6, pp. 404-410.

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