Improving mechanical properties of aluminum-lithium alloys

Details Improving mechanical properties of aluminum-lithium alloys Improving mechanical properties of aluminum-lithium alloys

C - Chemistry, Metallurgy

22

F

C22F 1/04 (2006.01) C22C 21/00 (2006.01)

Patent

CA 2157377

Strength and ductility for aluminum-lithium alloy wrought product in the transverse direction is improved by subjecting these types of alloys to improved T8 temper practice. The wrought product, after solution heat treating and quenching is subjected to a multiple step stretching sequence prior to aging, the total percent reduction for the multiple step stretching sequence ranging between 1 and 20 percent reduction. In the multiple step stretching sequence, each of the stretching steps may have the same or different amounts of percent reduction to achieve the desired total percent reduction. An aluminum-lithium alloy wrought product subjected to the improved T8 temper practice has increased tensile yield stress and percent elongation in its transverse direction to facilitate commercial application of the product in high strength applications.

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