Aluminum alloy and method of preparing the same

Details Aluminum alloy and method of preparing the same Aluminum alloy and method of preparing the same

1994-12-22

1996-07-02

Walsh, Donald P.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428548, 428567, 419 28, 419 30, 419 31, 419 38, 419 45, B22F 324

Patent

active

055320694

ABSTRACT:
A dispersion-strengthened aluminum alloy having a composite structure containing a matrix of .alpha.-aluminum and a precipitation deposited phase of an intermetallic compound with the intermetallic compound in a volume ratio of not more than 35 vol. %, has both high strength and high toughness. The precipitation phase of the intermetallic compound has an aspect ratio of not more than 3.0, the .alpha.-aluminum has a crystal grain size which is at least twice the grain size of the precipitation phase of the intermetallic compound, and the crystal grain size of the .alpha.-aluminum is not more than 200 nm. It is possible to obtain an aluminum alloy having the aforementioned limited structure by carrying out first and second heat treatments on gas-atomized powder containing at least 10 vol. % of an amorphous phase or a green compact thereof and thereafter carrying out hot plastic working.

REFERENCES:
patent: 4379719 (1983-04-01), Hildeman et al.
patent: 5284532 (1994-02-01), Skinner
Dictionary of Metallurgy by D. Birchon, George Newnes Limited pp. 110 and 111.

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