Patent ID: 8137075

Claim:
A compressor section of an engine comprising: a compressor impeller including a forward face and an aft face, the compressor impeller comprising: a bore section comprising a first nickel-based alloy, the bore section including an inner disk portion and a first plurality of blade portions extending axially therefrom, and a rim section comprising a second nickel-based alloy, the rim section including an outer disk portion and a second plurality of blade portions, the outer disk portion bonded to the inner disk portion of the bore section and the second plurality of blade portions bonded to the first plurality of blade portions of the bore section; and a cooling line extending axially along a length of the compressor impeller, the cooling line including an inlet and an outlet, the inlet disposed adjacent the forward face of the compressor impeller to divert air from an airflow forward the forward face into the cooling line, and the outlet disposed adjacent to the aft face of the compressor impeller to direct the air from the airflow to the aft face.