Low cycle fatigue crack elimination for integrally bladed disks

Details Low cycle fatigue crack elimination for integrally bladed disks Low cycle fatigue crack elimination for integrally bladed disks

F - Mech Eng,Light,Heat,Weapons

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F01D 5/00 (2006.01) B21K 1/36 (2006.01) B23P 15/00 (2006.01) F01D 5/34 (2006.01) F02C 7/00 (2006.01)

Patent

CA 1209924

- 14 - Abstract Low Cycle Fatigue Crack Elimination For Integrally Bladed Disks Stress relief for the rim of an integrally bladed rotor made from a forging preform is provided by forming a plurality of radially extending circum- ferentially spaced-apart slots around the periphery of the preform. The slots are forged closed in a subsequent forming step. An oxide layer on the slot surfaces prevents the surfaces from bonding together when forged closed. The blades are formed between slots during the forging or by machining after forging.

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