Corrosion resistant iron aluminides exhibiting improved mechanic

Details Corrosion resistant iron aluminides exhibiting improved mechanic Corrosion resistant iron aluminides exhibiting improved mechanic

1992-05-15

1994-06-14

Yee, Deborah

Alloys or metallic compositions

Ferrous

Four percent or more aluminum containing

C22C 3806

Patent

active

053208021

ABSTRACT:
The specification discloses a corrosion-resistant intermetallic alloy comprising, in atomic percent, an FeAl iron aluminide containing from about 30 to about 40% aluminum alloyed with from about 0.01 to 0.4% zirconium and from 0.01 to about 0.8% boron. The alloy exhibits considerably improved room temperature ductility for enhanced usefulness in structural applications. The high temperature strength and fabricability is improved by alloying with molybdenum, carbon, chromium and vanadium.

REFERENCES:
patent: 4961903 (1990-10-01), McKamey et al.
patent: 5084109 (1992-01-01), Sikka
Influences of Compositional Modifications on the Corrosion of Iron Alumindes by Molten Nitrate Salts, P. F. Tortorelli and P. S. Bishop, published Jan. 1991.
Microstructure and Tensile Properties of Fe-40 At. Pct Al Alloys with C, Zr, Hf, and B Additions, D. J. Gaydosh, S. L. Draper, and M. V. Nathal, Metallurgical Transactions vol. 20A, Sep. 1989.
Commentaries and Reviews, A review of recent developments in Fe.sub.3 Al-based alloys, Metals and Ceramics Division, vol. 6, No. 8 Aug. 1991 Oak Ridge National Laboratory, Oak Ridge, Tenn. 37831-6115, C. G. McKamey, et al.
Tensile Properties of NiAl and NiTi, vol. 94, 1966, A. G. Rozner and R. J. Wasilewski; Journal of the Institute of Metals, vol. 94, 1966.

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