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Two phase titanium aluminide alloy

United States Patent

April 10, 2001
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A two-phase titanic aluminide alloy having a lamellar microstructure with little intercolony structures. The alloy can include fine particles such as boride particles at colony boundaries and/or grain boundary equiaxed structures. The alloy can include alloying additions such as .ltoreq.10 at % W, Nb and/or Mo. The alloy can be free of Cr, V, Mn, Cu and/or Ni and can include, in atomic %, 45 to 55% Ti, 40 to 50% Al, 1 to 5% Nb, 0.3 to 2% W, up to 1% Mo and 0.1 to 0.3% B. In weight %, the alloy can include 57 to 60% Ti, 30 to 32% Al, 4 to 9% Nb, up to 2% Mo, 2 to 8% W and 0.02 to 0.08% B.
Deevi; Seetharama C. (Midlothian, VA), Liu; C. T. (Oak Ridge, TN)
Chrysalis Technologies, Incorporated (Richmond, VA)
09/ 174,103
October 16, 1998
STATEMENT OF GOVERNMENT RIGHTS The United States government has rights in this invention pursuant to contract No. DE-AC05-840R21400 between the United States Department of Energy and Lockheed Martin Energy Research Corporation, Inc.