Superplastic aluminum products and alloys

Details Superplastic aluminum products and alloys Superplastic aluminum products and alloys

1989-09-29

1991-10-08

Dean, R.

Alloys or metallic compositions

Superplastic

148 115A, 148438, 148439, C22C 2116, C22C 2106

Patent

active

050552570

ABSTRACT:
Superplastic forming of aluminum work stock is improved by including therein about 0.05% to about 10% or 15% scandium together with up to 0.2 or 0.25% zirconium. 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. Heat treatable aluminum alloys such as 7XXX alloys and 2XXX alloys can be made superplastic by including scandium and zirconium to provide very high strength in superplastically formed products.

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"Superplasticity of Alloy of the Al-Cu-Mg System with Additions of Transition Metals", A. M. Diskin et al., Sov. Non-Ferrous Met. Res., 1986, 14(6), 499-500.

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