1. Introduce
– The first production single crystal alloy
– Single crystal (SC) only alloy
– Improved melting point of the alloy without adding grain boundary strengthening elements
– Full employment of coarse-grained precipitation γ’ phase by high-temperature solubilization treatment, and fine re-precipitation is possible
* PWA Alloy : Mainly applied to airfoil (or airfoil) compressor blades of turbine engine fans
* Single crystal (SC) : A solid in which the entire crystal is regular along the crystal axis
* Solubilization treatment : Heating to a temperature where all the solid solution is re-dissolved in the base material and cooling to room temperature after a period of time to prevent the solid solution from precipitating out, creating a supersaturated phase, and improving hardness and mechanical strength
2. Property
– Excellent high temperature strength, high temperature creep, fatigue strength, creep rupture strength, thermal fatigue and oxidation resistance
| Element | Impact |
|---|---|
| Ni | Provides excellent strength and corrosion resistance |
| Cr | Provides corrosion resistance, oxidation resistance |
| Ta | Provides strength |
| Co | Provides strength, creep properties |
[PWA 1480 Chemical Composition (%)]
| Ni | Cr | Al | Ti |
|---|---|---|---|
| Min. 62.50 | Max. 10.00 | Max. 5.00 | Max. 1.50 |
| Co | W | Ta | |
|---|---|---|---|
| Max. 5.00 | Max. 4.00 | Max. 12.00 |
3. Available Form
– Sheet, Plate
– Bar, Rod
– Tubing
4. Application & Product
– Aerospace
| Application | Product |
|---|---|
| Aerospace | Turbine Blades, Turbine engine fans, Airfoils |
(1) Turbine Blades / (2) Turbine engine fans
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