Aluminum-lithium alloys and method of making same

Details Aluminum-lithium alloys and method of making same Aluminum-lithium alloys and method of making same

1988-07-01

1990-05-01

Dean, R.

Metal treatment

Compositions

Heat treating

148415, 148416, 148417, 148437, 148438, 148439, 148440, C22F 104

Patent

active

049215485

ABSTRACT:
Disclosed is a method of producing an unrecrystallized wrought aluminum-lithium product having improved levels of strength and fracture toughness. The method comprises the steps of providing a body of a lithium containing aluminum base alloy; heating the body to a hot working temperature and hot working the body to a first product. The product is cold worked to a second wrought product and then reheated while avoiding substantial recrystallization thereof, the reheating adapted to relieve stored energy capable of causing recrystallization during a subsequent heat treating step. The product is then solution heat treated, quenched and aged to provide a substantially unrecrystallized product having improved levels of strength and fracture toughness.

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