scholarly journals Exemplification of Detecting Gas Turbine Blade Structure Defects Using the X-ray Computed Tomography Method

Aerospace ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 119
Author(s):  
Józef Błachnio ◽  
Marek Chalimoniuk ◽  
Artur Kułaszka ◽  
Henryk Borowczyk ◽  
Dariusz Zasada
Keyword(s):  
Computed Tomography ◽  
Gas Turbine ◽  
Turbine Blades ◽  
Technical Condition ◽  
Test Results ◽  
Manufacturing Defects ◽  
X Ray ◽  
X Ray Computed ◽  
Ct System ◽  
Non Destructive

X-ray computed tomography is more often applied in non-destructive testing the quality of construction elements significantly crucial for reliability and safety of device elements, machines and complex industrial systems. This article describes the computed tomography (CT) system used to inspect the technical condition of turbine blades of the aircraft engine. The impact of the experimental conditions on the correctness of the obtained results was determined. The appropriate selection of parameters for the experiment was given, and the correct test results of gas turbine blades were presented. Failures, manufacturing defects, material deviations of nickel-cobalt alloyed blades were identified. The thickness of walls was measured in the selected cross-sections with the accuracy of 0.01 mm, and selected manufacturing defects of cooling passages were diagnosed. It was demonstrated that the application of the CT system allows for detailed non-destructive inspection of the technical condition of machine parts. The test results proved that the X-ray computed tomography could be applied in the production and repairs of machines.

scholarly journals Capabilities to Assess Health/Maintenance Status of Gas Turbine Blades with Non-Destructive Methods

2015 ◽  
Vol 21 (4) ◽  
pp. 41-47 ◽  
Author(s):  
Józef Błachnio
Keyword(s):  
Computed Tomography ◽  
Gas Turbine ◽  
Turbine Blades ◽  
Health Maintenance ◽  
Visual Method ◽  
X Ray ◽  
Active Thermography ◽  
X Ray Computed ◽  
Non Destructive ◽  
Destructive Methods

Abstract The paper has been intended to discuss non-destructive testing methods and to present capabilities of applying them to diagnose objectively changes in the microstructure of a turbine blade with computer software engaged to assist with the analyses. The following techniques are discussed: a visual method, based on the processing of images of the material surface in visible light, active thermography, based on the detection of infrared radiation, and the X-ray computed tomography. All these are new non-destructive methods of assessing technical condition of structural components of machines. They have been intensively developed at research centers worldwide, and in Poland. The computer-aided visual method of analyzing images enables diagnosis of the condition of turbine blades, without the necessity of dismantling of the turbine. On the other hand, the active thermography and the X-ray computed tomography, although more sensitive and more reliable, can both be used with the blades dismounted from the turbine. If applied in a complex way, the non-destructive methods presented in this paper, are expected to increase significantly probability of detecting changes in the blade's condition, which in turn would be advantageous to reliability and safety of gas turbine service.

scholarly journals ANALYSIS OF TECHNICAL CONDITION ASSESSMENT OF GAS TURBINE BLADES WITH NON-DESTRUCTIVE METHODS

2013 ◽  
Vol 7 (4) ◽  
pp. 203-208 ◽  
Author(s):  
Józef Błachnio
Keyword(s):  
Computed Tomography ◽  
Turbine Blades ◽  
Technical Condition ◽  
Structural Components ◽  
Visual Method ◽  
X Ray ◽  
Active Thermography ◽  
X Ray Computed ◽  
Non Destructive ◽  
Destructive Methods

Abstract Structural components of gas turbines, particularly the blades, sustain a variety of damages during the operation process. The most frequent cause of these damages are the overheating and thermal fatigue of the material. A primary technique to assess condition of the blades is the metallographic examination. In spite of the fact that metallographic analysis delivers much more information on the structure of examined blade material, it is a type of destructive test resulting in the destruction of the blade which makes further utilization of the item impossible. The paper has been intended to discuss non-destructive testing methods and to present capabilities of applying them to diagnose objectively changes in the microstructure of a turbine blade with computer software engaged to assist with the analyses. The following techniques are discussed: a visual method, based on the processing of images of the material surface in visible light, active thermography, based on the detection of infrared radiation, and the X-ray computed tomography. All these are new non-destructive methods of assessing technical condition of structural components of machines. They have been intensively developed at research centers worldwide, and in Poland. The computer-aided visual method of analyzing images enables diagnosis of the condition of turbine blades, without the necessity of dismantling of the turbine. On the other hand, the active thermography and the X-ray computed tomography, although more sensitive and more reliable, can both be used with the blades dismounted from the turbine. If applied in a complex way, the non-destructive methods presented in this paper, are expected to increase significantly probability of detecting changes in the blade’s condition, which in turn would be advantageous to reliability and safety of gas turbine service

X-RAY TOMOGRAPHY STUDIES OF PREHISTORIC CERAMIC ARTIFACTS

2014 ◽  
Vol 27 ◽  
pp. 1460135
Author(s):  
CARMEN PAVEL ◽  
FLORIN CONSTANTIN ◽  
COSMIN IOAN SUCIU ◽  
ROXANA BUGOI
Keyword(s):  
Computed Tomography ◽  
Cultural Heritage ◽  
Nuclear Physics ◽  
Structural Information ◽  
Ct Scans ◽  
Visual Examination ◽  
X Ray ◽  
X Ray Computed ◽  
Internal Configuration ◽  
Non Destructive

X-ray Computed Tomography (CT) is a powerful non-destructive technique that can yield interesting structural information not discernible through visual examination only. This paper presents the results of the CT scans of four objects belonging to the Romanian cultural heritage attributed to the Vinča, Cucuteni and Cruceni-Belegiš cultures. The study was performed with an X-ray tomographic device developed at the Department for Applied Nuclear Physics from Horia Hulubei National Institute for Nuclear Physics and Engineering in Măgurele, Romania. This apparatus was specially designed for archaeometric studies of low-Z artifacts: ceramic, wood, bone. The tomographic investigations revealed the internal configuration of the objects and provided information about the degree to which the previous manipulations affected the archaeological items. Based on the X-ray images resulting from the CT scans, hints about the techniques used in the manufacturing of the artifacts were obtained, as well as some indications useful for conservation/restoration purposes.

Non-Destructive Imaging Materials Investigation by Microfocus 3D X-Ray Computed Tomography

2009 ◽  
Vol 56 (3) ◽  
pp. 1448-1453 ◽  
Author(s):  
I. Lima ◽  
J. T. Assis ◽  
C. R. Apoloni ◽  
S. M. F. Mendonca de Souza ◽  
M. E. L. Duarte ◽  
...  
Keyword(s):  
Computed Tomography ◽  
X Ray ◽  
X Ray Computed ◽  
Non Destructive
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