| Citation: | QIN Shiyong, MI Chunhu, GU Yuanxing, et al. Analysis and verification of burst speed of FGH99 alloy dual property turbine disk[J]. Journal of Aerospace Power, 2025, 40（3）：20230383 doi: 10.13224/j.cnki.jasp.20230383
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Considering the influence of material performance differences in different organizational zones, the burst speed analysis of FGH99 alloy dual property turbine disk was conducted based on the average stress method, ultimate strain method, energy method, and plastic instability method. The turbine disk burst speed tests were conducted at room temperature and high temperature of 441 ℃, and radial fracture occurred in all cases. Comparison between the analysis and the test results showed that: the predicted result was larger than test data when using the average stress method with the error of 9.42%, and the prediction of fracture mode was not accurate. The correction factor 0.80 should be considered when predicting the radial burst speed; the maximum error between the predicted burst speed using the limit strain method and the energy method and the experimental results was 0.98%, and the predicted fracture starting position was consistent with the experimental results; the plastic instability method accurately predicted the fracture mode, and the maximum error in burst speed was 2.27%.
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