Fractographic study of fatigue failure of a high-pressure turbine rotor blade

The paper presents the results of a factual study of the fracture surface of a high-pressure turbine rotor blade with a fatigue crack. The study of the fracture relief showed that on the fracture surface of the blade near the trailing edge there is a zone of brittle transcrystalline and intergranula...

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Bibliographic Details
Published in:AIP conference proceedings 2022-10, Vol.2503 (1)
Main Authors: Rybalko, V. G., Novgorodov, D. V., Surkov, A. Yu, Rogova, E. A.
Format: Article
Language:English
Subjects:
Crack propagation
Fatigue failure
Fracture surfaces
High pressure
Intergranular fracture
Leading edges
Rotor blades
Rotor blades (turbomachinery)
Trailing edges
Turbines
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Summary:The paper presents the results of a factual study of the fracture surface of a high-pressure turbine rotor blade with a fatigue crack. The study of the fracture relief showed that on the fracture surface of the blade near the trailing edge there is a zone of brittle transcrystalline and intergranular fracture, surrounded by an intragranular fracture with a developed microrelief. Further crack growth in the direction of the leading edge was carried out by a fatigue mechanism. As a result, it was found that the main cause of blade failure is the formation and development of a fatigue crack in the direction from the trailing edge of the airfoil to the leading edge.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0099910