Two phase titanium aluminide alloy

Patent · Mon Jan 01 00:00:00 EST 2001

OSTI ID:873658

Deevi, Seetharama C ^[1]; Liu, C T ^[2]

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1. Midlothian, VA
2. Oak Ridge, TN

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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-84OR21400
• Assignee: Chrysalis Technologies, Incorporated (Richmond, VA)
• Patent Number(s): US 6214133
• OSTI ID: 873658
• Country of Publication: United States
• Language: English

Related Subjects

phase
titanium
aluminide
alloy
two-phase
titanic
lamellar
microstructure
intercolony
structures
fine
particles
boride
colony
boundaries
grain
boundary
equiaxed
alloying
additions
ltoreq
10
nb
free
mn
cu
atomic
45
55
40
50
weight
57
60
30
32
02
08
fine particles
aluminide alloy
titanium aluminide
grain boundary
fine particle
alloying additions
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