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MULTI-CAST TURBINE AIRFOILS AND METHOD FOR MAKING SAME

  • US 20090269193A1
  • Filed: 04/28/2008
  • Published: 10/29/2009
  • Est. Priority Date: 04/28/2008
  • Status: Active Grant
First Claim
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1. A method of providing a multi-material turbine airfoil having a tip and a root spaced-apart along a spanwise direction of the airfoil, the method comprising:

  • a) identifying airfoil sections in the spanwise direction subject, in use, to different conditions;

    b) selecting different cast alloy materials for the airfoil sections identified in a), the different cast alloy materials being selected in accordance with the conditions encountered by each of the identified airfoil;

    c) casting the airfoil sections; and

    d) friction welding the airfoil sections in an end-to-end relationship along the spanwise direction of the airfoil.

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