Aluminum alloy for the preparation of powders having increased h

Details Aluminum alloy for the preparation of powders having increased h Aluminum alloy for the preparation of powders having increased h

1986-06-18

1988-08-23

Dean, R.

Metal treatment

Stock

Aluminum base

420550, 420551, 420552, 420553, C22C 2100

Patent

active

047658517

ABSTRACT:
An aluminum alloy for the production of powders having increased high-temperature strength by rapid quenching, the said alloy containing 1.5 to 5% by weight of Li, 4 to 11% by weight of Fe and 1 to 6% by weight of at least one of the elements Mo, V or Zr, the remainder being Al, or 1.5 to 5% by weight of Li, 4 to 7% by weight of Cr and 1 to 4% by weight of at least one of the elements V or Mn, the remainder being Al. A low density and good high-temperature strength as well as good thermal stability up to 400.degree. C. coupled with Vickers hardnesses of up to 180 (HV) are achieved. Hardness-imparting dispersoids in the form of the phases Al.sub.3 Li and Al.sub.3 Zr, as well as other intermetallic compounds of Al with Mo, V or Mn, having a particle diameter of no more than 0.1 .mu.m, constitute a large volume fraction.

REFERENCES:
Corrosion Science, Band. 22, Nr. 4, P. Niskanen et al.: "Corrosion of Aluminium Alloys Containing Lithium", Seiten 283-304, Siehe Seiten 283-285, 1982.

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