Superplastic aluminium alloy sheets

Details Superplastic aluminium alloy sheets Superplastic aluminium alloy sheets

1984-10-12

1986-10-21

Dean, R.

Metal treatment

Stock

Age or precipitation hardened or strengthened

148 127A, 148416, 148417, 148418, 420902, C22C 2100

Patent

active

046183825

ABSTRACT:
Sheets of high strength superplastic Al--Zn--Mg alloys or Al--Cu alloys which having a maximum grain size below 30 .mu.m on average are described. These alloy sheets are obtained by a method which is characterized by keeping a homogenized and hot worked ingot of the alloy at two different temperatures for sufficient times whereby a fine grain structure is formed in the alloy to impart superplasticity to the alloy.

REFERENCES:
patent: 4486244 (1984-12-01), Ward et al.

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