Iron-aluminum alloys having high room-temperature and method for

Details Iron-aluminum alloys having high room-temperature and method for Iron-aluminum alloys having high room-temperature and method for

1992-06-26

1993-08-24

Yee, Deborah

Alloys or metallic compositions

Ferrous

Four percent or more aluminum containing

420 80, 148331, 148334, 148654, C21D 800, C22C 3806

Patent

active

052386457

ABSTRACT:
Iron-aluminum alloys having selectable room-temperature ductilities of greater than 20%, high resistance to oxidation and sulfidation, resistant pitting and corrosion in aqueous solutions, and possessing relatively high yield and ultimate tensile strengths are described. These alloys comprise 8 to 9.5% aluminum, up to 7% chromium, up to 4% molybdenum, up to 0.05% carbon, up to 0.5% of a carbide former such as zirconium, up to 0.1 yttrium, and the balance iron. These alloys in wrought form are annealed at a selected temperature in the range of 700.degree. C. to about 1100.degree. C. for providing the alloys with selected room-temperature ductilities in the range of 20 to about 29%.

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patent: 5084109 (1992-01-01), Sikka
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"The Mechanical Properties of Iron-Aluminum Alloys", W. Justusson et al., Transactions of the ASM, vol. 49 (1957) pp. 905-923.
"An Iron-Aluminum-Molybdenum Alloy", J. Dunning, U.S. Department of Interior Report of Investigations No. 8654, U.S. Government Printing Office 1982-505-002/31.
"Relationship Between Atomic Ordering and Fracture in Fe-Al Alloys", M. Marcinkowski et al., Journal of Materials Science, vol. 10 (1975), pp. 406-414.

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