Wave process of plastic deformation in titanium alloys determining the fracture mechanisms of compressor and fan disks on different scale levels.
Autor: | Shanyavskiy, Andrey, Nikitin, Aleksandr, Soldatenkov, Aleksey |
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Zdroj: | AIP Conference Proceedings; 2023, Vol. 2899 Issue 1, p1-9, 9p |
Abstrakt: | The processes of fatigue crack propagation in titanium compressor and fan disks of contemporary gas-turbine engines are generalized. As it was shown, the cracks in a disk material can initiate and propagate at the micro-, meso- and macroscale level depending on the crack origination location, namely, rim or hub part of disks. Crack growth mechanisms are determined by the dominant mechanism of wave process of plastic deformation for titanium alloys, which appears during forging of compressor and fan disks. This process results in creation of filament-type structure with alternating brittle and ductile filaments of two-phase titanium alloys. The features of titanium alloy fracture in the regions of high-cycle and very-high-cycle fatigue are considered. The instances of in-service failure for fan and compressor disk from titanium alloys are demonstrated, and both the duration of fatigue crack growth, and equivalent stress level are estimated. [ABSTRACT FROM AUTHOR] |
Databáze: | Complementary Index |
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