Aluminium base alloys

Details Aluminium base alloys Aluminium base alloys

1975-04-14

1977-07-05

Dean, R.

Metal treatment

Compositions

Heat treating

295277, 75138, 75147, 75148, 148 2, 148 115A, C22C 2100

Patent

active

040337944

ABSTRACT:
It has now been found that alloys of the type that are the cheapest and most widely used for the production of formed components may also be provided with superplastic properties. Such alloys may comprise a selected non-heat treatable base material together with dynamic recrystallization modifying additives to achieve fine structure. The base material may be aluminium of normal commercial purity and the additives 0.4% to 2% iron and 0.4 to 2% silicon; or the base material may be aluminium and 0.75 to 2.5% manganese and the additive 0.4 to 1% iron; or the base material may be aluminium and 0.25 to 0.75% manganese with no additive; or the base material may be aluminium and 1 to 4% magnesium and the additive 0.25 to 0.75% manganese. In all these cases at least one of the elements Zr, Nb, Ta and Ni must also be present in an amount of at least 0.3% substantially all of which is in solid solution and the total amount of said elements not exceeding 1%. The remainder of the alloy may be normal impurities and known incidental elements.

REFERENCES:
patent: 1932841 (1933-10-01), Dean et al.
patent: 2245166 (1941-06-01), Stroup
patent: 2670309 (1954-02-01), McClintock et al.
patent: 2871176 (1959-01-01), Draley et al.
patent: 3771214 (1973-11-01), Binger et al.

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