Nickel-base superalloys and components formed thereof

Details Nickel-base superalloys and components formed thereof Nickel-base superalloys and components formed thereof

C - Chemistry, Metallurgy

22

C

C22C 19/05 (2006.01) B23P 15/02 (2006.01) C22C 1/04 (2006.01)

Patent

CA 2704871

A gamma prime nickel-base superalloy and components formed therefrom that exhibit improved high-temperature dwell capabilities, including creep and hold time fatigue crack growth behavior. A particular example of a component is a powder metallurgy turbine disk of a gas turbine engine. The gamma-prime nickel-base superalloy contains, by weight, 18.0 to 30.0% cobalt, 11.4 to 16.0% chromium, up to 6.0% tantalum, 2.5 to 3.5% aluminum, 2.5 to 4.0% titanium, 5.5 to 7.5% molybdenum, up to 2.0% niobium, up to 2.0% hafnium, 0.04 to 0.20% carbon, 0.01 to 0.05% boron, 0.03 to 0.09% zirconium, the balance essentially nickel and impurities, wherein the titanium: aluminum weight ratio is 0.71 to 1.60.

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