Metal treatment – Stock – Aluminum base
Patent
1987-08-14
1989-10-17
McDowell, Robert L.
Metal treatment
Stock
Aluminum base
148 115A, 148438, 148439, 148440, 420902, C22F 104
Patent
active
048744409
ABSTRACT:
Superplastic forming of aluminum work stock is improved by including therein about 0.05% to about 10% or 15% scandium. In preferred practices, soluble elements such as magnesium are also included in the aluminum alloy. One or more of the elements from the group of scandium, yttrium, gadolinium, holminum, dysprosium, erbium, ytterbium, lutetium, and terbium, may be included in addition to or in lieu of scandium.
REFERENCES:
patent: 3619181 (1971-11-01), Willey
patent: 3876474 (1975-04-01), Watts et al.
patent: 4689090 (1987-08-01), Sawtell et al.
Bretz Philip E.
Jensen Craig L.
Sawtell Ralph R.
Aluminum Company of America
Lippert Carl R.
McDowell Robert L.
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