Process for producing aluminum-lithium alloys having improved su

Details Process for producing aluminum-lithium alloys having improved su Process for producing aluminum-lithium alloys having improved su

1988-05-25

1989-05-16

Dean, R.

Metal treatment

Compositions

Heat treating

148 127A, 420902, C22F 104

Patent

active

048306827

ABSTRACT:
A process for improving the properties of an aluminum-lithium product formed from a slab, such as an ingot or billet, of an aluminum-lithium alloy. Improved properties include superplastic response, reduced edge cracking during rolling, and reduced formation of stains during annealing. The process includes heating the slab to an elevated temperature to solutionize its soluble constituents, holding the slab at the elevated temperature to allow its soluble constituents to go into solution, cooling the slab to a rolling initiation temperature above about 650.degree. F. (343.degree. C.), and hot/warm rolling the slab to a desired gauge.

REFERENCES:
patent: 4486242 (1984-12-01), Ward et al.

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