Aluminum-based alloy with high strength and heat resistance cont

Details Aluminum-based alloy with high strength and heat resistance cont Aluminum-based alloy with high strength and heat resistance cont

1993-09-03

1995-05-30

Wyszomierski, George

Metal treatment

Stock

Aluminum base

148403, 420550, 420551, C22C 104, C22C 2100

Patent

active

054197899

ABSTRACT:
An aluminum-based alloy which consists Al and 0.1 to 25 atomic % of at least two transition metal elements and has a structure in which at least quasicrystals are homogeneously dispersed in a matrix composed of Al or a supersaturated Al solid solution. The quasicrystals are preferably composed of an I-phase alone or a mixed phase of an I-phase and a D-phase and preferably has a volume nfraction of 20% or less. Specifically, the aluminum-based alloy has the composition represented by the general formula Al.sub.bal Ni.sub.a X.sub.b or Al.sub.bal Ni.sub.a X.sub.b M.sub.c wherein X is one or two elements selected between Fe and Co; M is at least one element selected from among Cr, Mn, Nb, Mo, Ta and W; 5.ltoreq.a.ltoreq.10; 0.5.ltoreq.b.ltoreq.10; and 0.1.ltoreq.c.ltoreq.5. The alloy is excellent in hardness and strength both at room temperature and high temperature and in heat resistance and has a high specific strength. It can retain the excellent characteristics even when affected by the heat of working.

REFERENCES:
patent: 3925071 (1975-12-01), Ghosh
patent: 4347076 (1982-08-01), Ray et al.
patent: 4832737 (1989-05-01), Mathy et al.
patent: 5053085 (1991-10-01), Masumoto et al.
patent: 5204191 (1993-04-01), DuBois et al.
Tsai, et al., "New Decagonal Al-Ni-Fe and Al-Ni-Co Alloys Prepared by Liquid Quenching," Materials Transactions, J. I. M., vol. 30, No. 2 1989, pp. 150-154.
Nelson, David R., "Quasicrystals", Scientific American, Aug. 1986, pp. 43-51.

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