Light metal alloys, product and method of fabrication

Details Light metal alloys, product and method of fabrication Light metal alloys, product and method of fabrication

1983-08-26

1986-02-18

Andrews, Melvyn J.

Metal treatment

Compositions

Heat treating

148 115M, 148420, 148437, 420902, C21D 800

Patent

active

045712727

ABSTRACT:
A method of superplastically forming an article from a light metal base alloy, of the kind capable of having its crystal structure modified by cold working in such a way that subsequent dynamic recrystallization by hot working is facilitated, comprises cold working a first blank of the alloy to form a second blank having the modified crystal structure, and then forming the second blank into the article by hot working so that dynamic recrystallization is induced and super plastic deformation occurs. The degree of modification of the crystal structure during cold working is such that as the dynamic recrystallization continues, the grain size is progressively refined.

REFERENCES:
patent: 1620081 (1927-03-01), Czochralski et al.
patent: 3876474 (1975-04-01), Watts et al.
patent: 3984260 (1976-10-01), Watts et al.
patent: 3997369 (1976-12-01), Grimes et al.
patent: 4033794 (1977-07-01), Stowell et al.
patent: 4094705 (1978-06-01), Sperry et al.
patent: 4139400 (1979-02-01), Bennett
Metals Handbook, 8th Edition, "Cleaning and Finishing of Aluminum and Aluminum Alloys", 1964, pp. 616-617.

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