Patent ID: 8187724

Claim:
A method for fabricating a machinable structure comprising the steps of: providing a bore sub-element comprising a γ/γ′ powder metal (PM) nickel based superalloy; providing a body sub-element comprising a nickel aluminide intermetallic based alloy, the nickel aluminide intermetallic based alloy having improved strength and oxidation resistance when exposed to temperatures in a range of between about 1250° F. to about 1500° F., that is greater than a strength of the γ/γ′ powder metal (PM) nickel based superalloy, when the γ/γ′ powder metal (PM) nickel based superalloy is exposed to temperatures in the range; contacting the bore sub-element and the body sub-element; joining the bore sub-element and the body sub-element; and machining to define the machinable structure.