The overheating of the material is among major reasons for failures/damages to gas turbine blades throughout
the entire process of operating aircraft turbine engines. The essential method of diagnosing condition of the blades is
metallographic examination being however a destructive technique. The paper has been intended to discuss one of
non-destructive testing (NDT) methods, i.e. the X-ray computed tomography (CT), and capabilities of applying it to
diagnose changes in condition of gas turbine blades. ‘Tomography’ is a comprehensive term to define a set
of diagnostic techniques to produce three-dimensional images that present cross-sections through detail items under
scrutiny. The CT is a transmission diagnostic technique that allows layered models (images) of details to be acquired.
Most commonly, it is used in research laboratories and throughout the process of the product quality inspection.
The paper delivers findings of the preliminary investigation into the assessment of health/maintenance status of gas
turbine blades by means of the X-ray computed tomography. The results gained have been successfully verified using the
metallographic examination techniques. It has been found that the radiographic imaging method enables recognition of
types, sizes, and locations of internal faults in the blades while generating three-dimensional images thereof.
Presented are capabilities of the high-resolution X-ray inspection machine with computed tomography (CT),
V/tome/x, furnished with a 300 kV tube, and the CT data processing capabilities of the VG Studio Max software
solution, high-performance CT reconstruction included (using an optional module). At the same time work is under
way with the X-ray tube for nanotomography with the 0.5 m resolution to examine, in particular, modern composite
materials.
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