Turbine airfoil component and method for making

摘要

A component such as a turbine bucket or blade, and method for making the component, are presented. One embodiment is an article that comprises an airfoil casting portion comprising a plurality of integral regions, wherein the plurality of integral regions comprises a single-crystalline region and a columnar-grained region. Another embodiment is a method for fabricating an article. The method comprises providing a quantity of molten metal; providing a mold defining an airfoil portion having an axial direction and a transverse direction, wherein the airfoil portion of the mold comprises a single-crystal growth region and a columnar growth region disposed along the transverse direction from the single crystal growth region; introducing the molten metal into the mold; and solidifying the metal such that a solidification front progresses in the axial direction to produce an airfoil casting portion comprising a single-crystalline region and a columnar-grained region.

主权项

1. An article, comprising:
an airfoil casting portion comprising:
a plurality of integral regions comprising a single-crystalline region and a columnar-grained region;a leading edge section comprising a leading edge of the airfoil casting portion; anda trailing edge section comprising a trailing edge of the airfoil casting portion, wherein
the single-crystalline region comprises a single-crystalline material; andthe single-crystalline material is disposed at least at the leading edge of the airfoil casting portion or at the trailing edge of the airfoil casting portion.