A alloy product containing Li, resistance to corrosion under str

Details A alloy product containing Li, resistance to corrosion under str A alloy product containing Li, resistance to corrosion under str

1988-02-17

1990-09-11

Dean, R.

Metal treatment

Compositions

Heat treating

148159, 148415, 148416, 148417, 148418, C22F 104

Patent

active

049554131

ABSTRACT:
The invention concerns an Al alloy product containing lithium, with great specific mechanical strength and high tolerance to damage, particularly resistance to corrosion under stress in processed state (quenched-tempered), particularly in recrystallized state, and a process to obtain said product.
The products according to the invention present a specific microstructure, with numerous rather coarse precipitates of intermetallic phases which are rich in Al, Cu, Li, Mg and optionally also Zn, of which the volume fraction is between 0.6 and 4%. A differential enthalpic analysis allows verification that the product has been processed according to the method which is claimed.
This method consists of applying the following thermal treatments to the alloy:

REFERENCES:
patent: 4526630 (1985-07-01), Field

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