Aluminum-lithium alloys and process therefor

Details Aluminum-lithium alloys and process therefor Aluminum-lithium alloys and process therefor

1988-07-01

1990-04-10

Dean, R.

Metal treatment

Compositions

Heat treating

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

Patent

active

049157477

ABSTRACT:
Disclosed is a method of producing an unrecrystallized, thin gauge cold rolled aluminum-lithium sheet 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 rolling temperature, and hot rolling the body to a first intermediate sheet product. After cold rolling to a second intermediate thickness, the sheet product is reheated and hot rolled to produce a final sheet product while avoiding substantial recrystallization there, the hot rolling adapted to relieve stored energy capable of initiating recrystallization during a subsequent heat treating step. Thereafter, the sheet product is solution heat treated, quenched and aged to provide a substantially unrecrystallized product having improved levels of strength and fracture toughness.

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