Assessing the Condition of Gas Turbine Rotor Blades with the Optoelectronic and Thermographic Methods

Mariusz Bogdan , J. Błachnio , A. Kułaszka , Marcin Derlatka


Gas turbines and their blades in particular might be damaged in the course of the aviation turbojet engine operation process. The degradation process of the blade microstructure is most evident from the change in the colour of its surface. This is assessed using the optoelectronic method. The article presents the concept of non-destructive methods, which are used to assess the degree of degradation of the alloy of a gas turbine blade. The proposed optoelectronic method is the basic method for the preliminary determination of color changes in the surface. Appropriate videoscopes or video-analyzers, capable of recording a test object in various electromagnetic wave ranges (infrared radiation, visible range), are used for this purpose. These preliminary results of the diagnosis make it possible to infer further studies of the blade. For accurate investigation of the state of the alloy microstructure, a non-destructive thermographic method (xenon flash pulsed thermography) was used. The results of studies of the degradation of the microstructure with the use of non-destructive methods were verified through the use of metallographic investigations. Appropriate metallographic specimens were created in order to recognize phase γ′ degradation (i.e., the phase strengthening the blade alloy). The results of the presented research allowed for an in-depth assessment of the degree of microstructure degradation of operated blades.
Author Mariusz Bogdan (FME / DACR)
Mariusz Bogdan,,
- Department of Automatic Control and Robotics
, J. Błachnio
J. Błachnio,,
, A. Kułaszka
A. Kułaszka,,
, Marcin Derlatka (FME / DBBE)
Marcin Derlatka,,
- Department of Biocybernetics and Biomedical Engineering
Journal seriesMetals, ISSN 2075-4701, (N/A 70 pkt)
Issue year2019
Publication size in sheets0.75
Keywords in Englishturbine blade, digital image, impulse thermography, microstructure degradation
ASJC Classification2500 General Materials Science
Internal identifier000045054
Languageen angielski
LicenseJournal (articles only); published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)70
Score sourcejournalList
ScoreBUT score = 36.0, 05-03-2019, manual
Ministerial score = 70.0, 06-03-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.231; WoS Impact Factor: 2018 = 2.259 (2) - 2018=2.371 (5)
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