Alcoa Inc.

Arconic Corporation

Arconic Technologies LLC

Les A Yocum

Diana K Denzer

Ralph R Sawtell

Roberto J Rioja

Gary H Bray

Edward L Colvin

Andre L Wilson

Todd K Cogswell

Andreas K Kulovits

Douglas S Bae

Logan Kirsch

Ronald G Cheney

New methods of making cold formed, extruded aluminum lithium alloys, and unrecrystallized products made therefrom are disclosed. A method may include one or more of heating an unrecrystallized extruded aluminum-lithium product to a treatment temperature, cooling the unrecrystallized extruded aluminum-lithium product from the treatment temperature to a post-treatment temperature, and cold forming the unrecrystallized extruded aluminum-lithium product into a second product form. Due to the unique processing conditions of the method, the second product form may wholly or partially retain the unrecrystallized microstructure.

Methods of cold forming aluminum lithium alloys

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

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West Lafayette, IN, United States of America

Les A Yocum