Dual alloy turbine disk
AssigneeGeneral Electric Company
InventorsDaniel D. Krueger, Bruce P. Bardes, Richard G. Menzies, Swami Ganesh, Jeffrey F. Wessels, Sulekh C. Jain, Michael E. Sauby, Keh-Minn Chang
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Abstract
A dual alloy disk made from a rim alloy having high stress rupture and creep resistance as well as good hold time fatigue crack resistance and a hub alloy having high tensile strength and good low cycle fatigue crack resistance is described. The dual alloy disk is designed for use as a disk in gas turbine engines operating as high as 1500.degree. F. The hub and rim are joined together at a substantially defect-free joint to form a turbine disk having improved properties in both the hub and rim regions.
Claims17
A dual alloy turbine disk including a rim of a first metal;
- said disk further including a hub of a second metal;
- said hub and said rim having approximately conforming preformed surfaces being metallurgically joined together at a joint region in a closed die, said die having a cavity adjacent to said joint region for receiving potentially defect-laden material from said joint region during joining, thereby rendering said joint region substantially defect free and forming said disk as an integral forged article of manufacture, said joint region further having been deformed during joining.
A dual alloy turbine disk including a rim of a first alloy having high creep resistance and hold time fatigue crack growth resistance;
- said disk further including a hub of a second alloy having high tensile strength and low-cycle fatigue crack growth resistance;
- said hub and said rim having approximately conforming preformed surfaces being metallurgically joined together throughout a joint region in a closed die, said die having a cavity adjacent to said joint region for receiving potentially defect-laden material from said joint region into said cavity during joining thereby rendering said joint region substantially defect free and forming disk as an integral forged article of manufacture, said joint region further having been deformed during joining.
Dependencies are inferred from the claim text.