Aluminum alloy products and methods of preparation

Details Aluminum alloy products and methods of preparation Aluminum alloy products and methods of preparation

1974-05-17

1976-11-02

Dean, R.

Metal treatment

Compositions

Heat treating

295277, 75138, 75148, 148 115A, 148 32, C22F 104

Patent

active

039895483

ABSTRACT:
Dispersion strengthened aluminum alloy products are produced by working a cast aluminum alloy having a content of unaligned intermetallic rods in a selected size range to break up the brittle intermetallic rods. The intermetallic rods form 5.0 - 20 per cent by volume of the alloy and have an average diameter in the range of 0.1 - 1.5 (preferably 0.1 - 0.8) microns.
The working required to effect the necessary segmentation of the rods and dispersion of the resultant intermetallic particles is sufficient to reduce the alloy by at least 60%. Initial hot working is preferably followed by cold working to effect at least a further 10% reduction of the hot worked alloy.
The preferred alloys are alloys of Al-Fe-Mn and Al-Fe-Ni having a composition close to the eutectic and are cast under conditions to avoid as far as possible the formation of coarse primary intermetallic particles.

REFERENCES:
patent: 1945297 (1934-01-01), Sterner-Rainer
patent: 2170039 (1939-08-01), Steudel
patent: 3811846 (1974-05-01), Schoerner et al.
patent: 3830635 (1974-08-01), Chia et al.

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