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Ni Based Superalloy : Waspalloy

Ni Based Superalloy : Waspalloy. Background of Waspalloy. Developed by NASA on their power recovery turbine blades. Nickel based alloy used in high heat/stress situations: jet-turbine machinery hot gas expanders high temp. seals.

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Ni Based Superalloy : Waspalloy

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  1. Ni Based Superalloy:Waspalloy

  2. Background of Waspalloy • Developed by NASA on their power recovery turbine blades. • Nickel based alloy used in high heat/stress situations: • jet-turbine machinery • hot gas expanders • high temp. seals. • Extremely resistant to corrosion by combustion products, up to 1600°F.

  3. Micro Structure • Vacuum Induction Melting: VIM • Reduced levels of nitrogen and oxygen • Allows for better control of Titanium and Aluminum alloying • Increases forgeability • Produced in cast and wrought forms • FCC structure

  4. Properties • Specific Gravity- • Waspalloy - 8.25 • Steel - 7.83 • Titanium - 4.55 • Composition- • 57% Ni 19.5% Cr • 13.5% Co 4.3% Mo • 2% Fe (max) 1.4% Al • 3% Ti .07% C • .006% B .09% Zr • Waspalloy retains its original composition until 1400°F while steel falls off @ 800°F

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