1. Ni Based Superalloy: Waspalloy By : Klint Hoelscher MEEN 3344

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

5. Resources Cited American Society for Metals, Metals Handbook. Desk Edition, 1985. American Society for Metals, Metals Handbook. Desk Edition, 1985. Turbo Machinery Products-Rotating. 10 Oct. 2006. tmpGoodrich Products website. Turbo Machinery Products-Rotating. 10 Oct. 2006. tmpGoodrich Products website. http://www.tmp.goodrich.com/products/rotating.shtml Hoelscher, Bruce. Senior Maintenance Engineer, Valero Refining Co. Hoelscher, Bruce. Senior Maintenance Engineer, Valero Refining Co. Waspalloy Technical Data. 10 Oct. 2006. High Temp. Metals website. Waspalloy Technical Data. 10 Oct. 2006. High Temp. Metals website. http://www.hightempmetals.com/techdata/hitempWaspaloydat a.php http://www.hightempmetals.com/techdata/hitempWaspaloydat a.php