Production of superplastic zinc-aluminium alloy sheet

Details Production of superplastic zinc-aluminium alloy sheet Production of superplastic zinc-aluminium alloy sheet

1975-04-07

1976-05-04

Stallard, W.

Metal treatment

Compositions

Heat treating

C22C 1804, C22F 116

Patent

active

039545156

ABSTRACT:
A process for providing superplastic properties in a Zinc/aluminium alloy containing between 18 and 40% by weight of aluminium, comprising heat-treating a body of the alloy until a substantially homogeneous structure is obtained, cooling the body of alloy to a temperature below 275.degree.C, and working the body of alloy to reduce a dimension thereof by at least 90%, wherein the body of alloy is initially cooled to a temperature of not less than 275.degree.C and is subsequently further cooled after the body of alloy has been at least partially worked, and wherein more than half of the total percentage dimension reduction is carried out at 275.degree.C or above.

REFERENCES:
patent: 3676115 (1972-07-01), Hare et al.
patent: 3753791 (1973-08-01), Swanson
patent: 3793091 (1974-02-01), Gervais et al.
patent: 3798028 (1974-03-01), Gervais et al.
patent: 3850622 (1974-11-01), Balliet

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