Method of making a single-crystal turbine blade
AssigneePratt & Whitney Canada Corp.
InventorsChao Zhang, Robert Huszar, Othmane Leghzaouni
Life of this patent
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Abstract
A single-crystal turbine blade and a method of making such single-crystal turbine blade are disclosed. During manufacturing, a secondary crystallographic orientation of the material of the single-crystal turbine blade is controlled based on a parameter of a root fillet between an airfoil of the single-crystal turbine blade and a platform of the single-crystal turbine blade. The parameter can be a location of peak stress in the root fillet expected during use of the turbine blade.
Claims9
A method of making a single-crystal turbine blade with a material having a face centered cubic crystallographic structure, the method comprising:
- during manufacturing of the single-crystal turbine blade:
- controlling a secondary crystallographic orientation of the material based on a parameter of a root fillet between an airfoil of the single-crystal turbine blade and a platform of the single-crystal turbine blade;
- controlling a primary crystallographic orientation of the material to be at 30 degrees from an airfoil stacking line of the single-crystal turbine blade;
- and
- controlling the secondary crystallographic orientation of the material to be perpendicular to a reference plane that is perpendicular to an edge of the root fillet, the edge of the root fillet being closer to the airfoil than to the platform.
A method of making a turbine blade including an airfoil made of a material having a single-crystal crystallographic structure, a platform connected to the airfoil and a root fillet defined between the airfoil and the platform, the method comprising:
- determining a location of peak stress in the root fillet expected during use of the turbine blade;
- and
- during manufacturing of the turbine blade:
- controlling a secondary crystallographic orientation of the material based on the location of peak stress in the root fillet to be perpendicular to a reference plane that is perpendicular to an edge of the root fillet, wherein the edge of the root fillet being closer to the airfoil than to the platform;
- and
- controlling a primary crystallographic orientation of the material to be at 30 degrees from a stacking line of the airfoil.
A turbine blade comprising:
- an airfoil made of a material having a single-crystal face centered cubic crystallographic structure;
- a platform connected to the airfoil;
- and
- a root fillet defined between the airfoil and the platform;
- wherein:
- a secondary crystallographic orientation of the material is based on a parameter of the root fillet;
- the secondary crystallographic orientation of the material is perpendicular to a reference plane that is perpendicular to an edge of the root fillet, the edge of the root fillet being closer to the airfoil than to the platform;
- and
- a primary crystallographic orientation of the material is at 30 degrees from a stacking line of the airfoil.
Dependencies are inferred from the claim text.