Alcoa Inc.

Arconic Corporation

Todd K Cogswell

Ralph R Sawtell

Roberto J Rioja

Gary H Bray

Edward L Colvin

Diana K Denzer

Andre L Wilson

Les A Yocum

Improved aluminum-copper-lithium alloys are disclosed. The alloys may include 3.4-4.2 wt. % Cu, 0.9-1.4 wt. % Li, 0.3-0.7 wt. % Ag, 0.1-0.6 wt. % Mg, 0.2-0.8 wt. % Zn, 0.1-0.6 wt. % Mn, and 0.01-0.6 wt. % of at least one grain structure control element, the balance being aluminum and incidental elements and impurities. The alloys achieve an improved combination of properties over prior art alloys.

Aluminum-copper-lithium alloys

Growing community of inventors

Lafayette, IN, United States of America

Todd K Cogswell