Arconic Technologies LLC

Andreas K Kulovits

Baolute Ren

Diana K Denzer

Harry R Zonker

Les A Yocum

Tao Zhou

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

New aluminum alloy brazing sheets are disclosed. The new aluminum alloy brazing sheets may include a core, an interliner layer adjacent the core, and a braze liner adjacent the interliner layer. The interliner layer may include a first aluminum alloy having at least 0.35 wt. % Si and from 0.05 to 2.0 wt. % Mg. The braze liner may include a second aluminum alloy having 0.05 to 2.0 wt. % Mg. The first aluminum alloy and the second aluminum alloy may include an amount of magnesium sufficient to achieve T(IL)&#x2265;5&#xb0; C. T(BL). The new aluminum alloy brazing products may be useful, for instance, in fluxfree brazing.

Aluminum alloy brazing sheets for fluxless brazing

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Pittsburgh, PA, United States of America

Andreas K Kulovits