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

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