Method of imparting a fine grain structure to aluminum alloys ha

Details Method of imparting a fine grain structure to aluminum alloys ha Method of imparting a fine grain structure to aluminum alloys ha

1981-02-20

1982-11-09

Dean, R.

Metal treatment

Compositions

Heat treating

C22F 104

Patent

active

043583245

ABSTRACT:
A method is provided to impart a fine grain structure to aluminum alloys which have precipitating constituents. The alloy is overaged to form coarse precipitates, and then plastically deformed at least 40%. Deformation is accomplished at a temperature and at a rate which are sufficient to retain strain energy in the alloy at the end of the deformation step. The alloy is subsequently heated at a rate of at least 0.02.degree. F..multidot.s.sup.-1 to a recrystallization temperature to form a new fine grain structure.

REFERENCES:
patent: 4092181 (1978-05-01), Paton et al.

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