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Title: Iron aluminide alloys with improved properties for high temperature applications

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.
Authors:
 [1] ;  [2]
  1. (Knoxville, TN)
  2. (Oak Ridge, TN)
Publication Date:
OSTI Identifier:
867550
Report Number(s):
US 4961903
DOE Contract Number:
AC05-84OR21400
Resource Type:
Patent
Research Org:
LOCKHEED MARTIN ENRGY SYST INC
Country of Publication:
United States
Language:
English
Subject:
iron; aluminide; alloys; improved; properties; temperature; applications; improved; iron; aluminide; alloy; type; increased; temperature; ductility; improved; elevated; temperature; strength; alloy; resistant; corrosive; attack; environments; advanced; energy; corrosion; systems; fossil; fuels; resultant; alloy; relatively; inexpensive; contrasted; nickel; based; nickel; steels; currently; utilized; structural; components; alloy; consists; essentially; 26-30; aluminum; 5-10; chromium; 02-0; boron; plus; carbon; molybdenum; niobium; zirconium; yttrium; vanadium; balance; iron; structural components; nickel base; temperature strength; temperature applications; balance iron; aluminide alloys; aluminide alloy; aluminide alloy; temperature ductility; elevated temperature; iron aluminide; 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 /420/