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CRACK PATH OF IN-SERVICE FAILED TITANIUMCOMPRESSOR DISKS IN HIGH- AND LOW-CYCLE-FATIGUE REGIME
Last modified: 2013-03-15
Abstract
The fatigue crack path for titanium compressor disks in rim parts ofaircrafts engines D-30 and D-30Ku of the first stage of the low-pressure compressorhas discussed. Based on fractographic analysis shown that the high cycle fatigue regimeis the first stage for in-service damage accumulation in the titanium alloy VT3-1 usedfor compressor disks manufacturing procedure. This situation took place in the case ofcracks propagation in the perpendicular direction to the disks radius in disks of engineD-30. In disks of engine D-30Ku crack propagation took place along the disk radius.This situation is analysed based on results of numerical estimations of material stress-state and sequence of the crack path features for two stages of high cycle and low cyclefatigue regime for disks has shown.
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