Aluminum-lithium alloys

US5137686A · kind A · utility

Assignee

• Aluminum Company of America · US

Inventors

• Roberto J. Rioja · Lower Burrell, US
• Alex Cho · Richmond, US
• Edward L. Colvin · Blacksburg, US
• Asuri K. Vasudevan · Pittsburgh, US

Key dates

• Filing date: Jan 28, 1988
• Grant date: Aug 11, 1992
• Expiry date: Jan 28, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22F1/04
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Disclosed is an aluminum base alloy suitable for forming into a wrought product having improved combinations of strength, corrosion resistance and fracture toughness. The alloy is comprised of 0.2 to 5.0 wt. % Li, 0.05 to 6.0 wt. % Mg, at least 2.45 wt. % Cu, 0.01 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.