Patent ID: 6957948
Filing Date: 2005-10-25
Classification: F01D

Abstract:
1. A turbine blade for rotation about an axis, said turbine blade having an increased resistance to creep while generally maintaining operating stress levels at an interface region between said turbine blade and a mating turbine disk, said turbine blade comprising: an attachment having a generally planar first surface generally parallel to said axis and a plurality of axially extending serrations for engagement with said turbine disk; a neck fixed to said attachment and extending generally radially outward from said attachment, said neck have a region of minimum thickness that is measured generally perpendicular to said axis; a platform fixed to said neck and extending generally radially outward from said neck; an airfoil having a first end and a second end in spaced relation, wherein said airfoil first end is fixed to said platform and said airfoil extends generally radially outward from said platform; and, a plurality of first cavities extending generally radially outward from said attachment first surface, through said attachment, and into said neck, such that said first cavities terminate radially inward of said platform, wherein said plurality of first cavities each have a center, a first diameter D