C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
75/113, 148/3.6
C22C 19/05 (2006.01) C30B 11/00 (2006.01)
Patent
CA 1315572
PHASE STABLE SINGLE CRYSTAL MATERIALS ABSTRACT OF THE DISCLOSURE Nickel base superalloy single crystal articles, preferably aircraft gas turbine blades and vanes, and a process for preparation thereof, wherein phase stability after extended elevated temperature exposure is enhanced by controlling the content of heavy refractory elements and gamma prime phase forming elements. The nominal alloy composition range in weight percent is 4-6 percent chromium, 8-12 percent cobalt, 1-2.5 percent molybdenum, 3-6 percent tungsten, 1.8-3.2 percent rhenium, 0-2.5 percent ruthenium, 5-6 percent aluminum, 0.5-1.5 percent titanium, 7-10 percent tantalum, 0.08-0.12 percent hafnium, balance nickel. The sum of the heavy refractory elements molybdenum plus tungsten plus rhenium is 8.4-10.4 percent, and the sum of the gamma prime forming elements aluminum plus titanium plus tantalum is 13.8-15.7 percent.
533715
Garrett Corporation (the)
Gowling Lafleur Henderson Llp
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