Iron aluminide alloys with improved properties for high temperature applications

Patent · Mon Jan 01 00:00:00 EST 1990

OSTI ID:867550

McKamey, Claudette G ^[1]; Liu, Chain T ^[2]

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1. Knoxville, TN
2. Oak Ridge, TN

An improved iron aluminide alloy of the DO.sub.3 type that has increased room temperature ductility and improved high elevated temperature strength. The alloy system further is resistant to corrosive attack in the environments of advanced energy corrosion systems such as those using fossil fuels. The resultant alloy is relatively inexpensive as contrasted to nickel based and high nickel steels currently utilized for structural components. The alloy system consists essentially of 26-30 at. % aluminum, 0.5-10 at. % chromium, 0.02-0.3 at. % boron plus carbon, up to 2 at. % molybdenum, up to 1 at. % niobium, up to 0.5 at. % zirconium, up to 0.1 at. % yttrium, up to 0.5 at. % vanadium and the balance iron.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-84OR21400
• Assignee: Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
• Patent Number(s): US 4961903
• OSTI ID: 867550
• Country of Publication: United States
• Language: English

Related Subjects

iron
aluminide
alloys
improved
properties
temperature
applications
alloy
type
increased
ductility
elevated
strength
resistant
corrosive
attack
environments
advanced
energy
corrosion
systems
fossil
fuels
resultant
relatively
inexpensive
contrasted
nickel
based
steels
currently
utilized
structural
components
consists
essentially
26-30
aluminum
5-10
chromium
02-0
boron
plus
carbon
molybdenum
niobium
zirconium
yttrium
vanadium
balance
structural components
nickel base
temperature strength
temperature applications
balance iron
aluminide alloys
aluminide alloy
temperature ductility
elevated temperature
iron aluminide
consists essentially
fossil fuel
relatively inexpensive
fossil fuels
improved properties
corrosive attack
nickel based
improved iron
temperature application
structural component
advanced energy
currently utilized
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