Alloys or metallic compositions – Ferrous – Four percent or more aluminum containing
Patent
1994-09-06
1996-08-13
Yee, Deborah
Alloys or metallic compositions
Ferrous
Four percent or more aluminum containing
C22C 3806
Patent
active
055453732
ABSTRACT:
This invention relates to improved corrosion-resistant iron-aluminide intermetallic alloys. The alloys of this invention comprise, in atomic percent, from about 30% to about 40% aluminum alloyed with from about 0.1% to about 0.5% carbon, no more than about 0.04% boron such that the atomic weight ratio of boron to carbon in the alloy is in the range of from about 0.01:1 to about 0.08:1, from about 0.01 to about 3.5% of one or more transition metals selected from Group IVB, VB, and VIB elements and the balance iron wherein the alloy exhibits improved resistance to hot cracking during welding.
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patent: 5084109 (1992-01-01), Sikka
patent: 5320802 (1994-06-01), Liu et al.
P. F. Tortorelli and P. S. Bishop, Influences of Compositional Modification on the Corrosion of Iron Aluminides by molten Nitrate Salts, published Jan. 1991.
D. J. Gaydosh, S. L. Draper, and M. V. Nathal, "Microstructure and Tensile Properties of Fe-40 At. Pct. Al Alloys with C, Zr, Hf, and B Additions", Metallurgical Transactions, vol. 20A, Sep. 1989.
C. G. McKamey, J. H. DeVan, P. F. Torortelli, and V. K. Sikka; A review of recent developments in Fe-l-based alloys, J. Mater Res., vol. 6, No. 8, Aug. 1991.
A. G. Rozner and R. J. Wasilewski; "Tensile Properties of NiAl and NiTi" Journal of the Institute of Metals, vol. 94, 1966.
Goodwin Gene M.
Liu Chain T.
Maziasz Philip J.
Adams H. W.
Griffin J. D.
LaRose David E.
Martin Marietta Energy Systems Inc.
Yee Deborah
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