Modares Mechanical Engineering

Modares Mechanical Engineering

Evaluating the Debonding Defect Detectability in Thermal Barrier Coatings (TBC) by Nondestructive Active Thermography Technique

Document Type : Original Research

Authors
Mohammad Amin Zarezadeh Mehrizi
Mohammadreza Farahani
Majid Safarabadi
Mojtaba Rezaee Hajideh
Majid Farhang
University of Tehran
10.48311/mme.24.12.717
Abstract
In thermal barrier coatings (TBC), surface cracks, debonding, and thickness degradation may occur during the manufacturing process or life cycle, leading to poor performance and ultimately a dangerous system failure. The main goal of non-destructive testing of thermal barrier coatings is to detect these defects and determine the health of the coating. Various non-destructive inspection methods have been proposed to evaluate thermal barrier coatings, and due to the numerous advantages of thermography, including high speed, low cost, safety, no need for direct contact, automation capability, and inspection of a large area of ​​the part, this method has received special attention from researchers. This study will present a method for manufacturing samples with different diameters of artificial separation defects. The following is the equipment's arrangement and the sample's thermography process. It was concluded that blackening the surface of the sample by increasing the amount of thermal energy absorption increased the ability to identify separation defects and increased the signal-to-noise ratio by 257%. Finally, by implementing different filters on the recorded raw thermal images, it has been shown that in both cases the best filter in terms of SNR is the median filter and then the Gaussian filter. The background removal filter also had no noticeable effect on increasing the signal-to-noise ratio and acted as a complement to the median and Gaussian filters by reducing the fixed error
Keywords
Thermal Barrier Coating
Active Thermography
non-destructive inspection
Debonding Defects
Contrast Enhancement

Subjects

1. Yuri M, Masada J, Tsukagoshi K, Ito E, Hada S. Development of 1600°C-Class High-efficiency Gas Turbine for Power Generation Applying J-Type Technology. Mitsubishi Heavy Ind Tech Rev [Internet]. 2013;50(3):1–10. Available from: https://www.mhi.co.jp/technology/review/pdf/e503/e503001.pdf
2. Ptaszek GS. Investigation and development of transient thermography for detection of disbond in thermal barrier coating. 2012;
3. fukuchi2013.pdf.
4. Unnikrishnakurup S, Dash J, Ray S, Pesala B. NDT and E International Nondestructive evaluation of thermal barrier coating thickness degradation using pulsed IR thermography and THz-TDS measurements : A comparative study. NDT E Int [Internet]. 2020;116(September):102367. Available from: https://doi.org/10.1016/j.ndteint.2020.102367
5. Li Y, Yan B, Li W, Li D. Thickness Assessment of Thermal Barrier Coatings of Aeroengine Blades Via Dual-Frequency Eddy Current Evaluation. IEEE Magn Lett. 2016;7.
6. Cernuschi F, Bison P. Thirty Years of Thermal Barrier Coatings (TBC), Photothermal and Thermographic Techniques: Best Practices and Lessons Learned. J Therm Spray Technol [Internet]. 2022;31(4):716–44. Available from: https://doi.org/10.1007/s11666-022-01344-w
7. Zhu J, Mao Z, Wu D, Zhou J, Jiao D, Shi W, et al. Progress and Trends in Non-destructive Testing for Thermal Barrier Coatings Based on Infrared Thermography: A Review. J Nondestruct Eval [Internet]. 2022;41(3):1–26. Available from: https://doi.org/10.1007/s10921-022-00880-3
8. Bison PG, Marinetti S, Grinzato EG, Vavilov VP, Cernuschi F, Robba D. Inspecting thermal barrier coatings by IR thermography. Thermosense XXV. 2003;5073:318.
9. Muzika L, Švantner M. Flash pulse phase thermography for a paint thickness determination. IOP Conf Ser Mater Sci Eng. 2020;723(1).
10. Thermal E, Moskovchenko A, Vavilov V, Švantner M. Active IR Thermography Evaluation of Coating Thickness by Determining Apparent. 2020;
11. Shrestha R, Kim W. Evaluation of coating thickness by thermal wave imaging: A comparative study of pulsed and lock-in infrared thermography – Part II: Experimental investigation. Infrared Phys Technol [Internet]. 2018;92(April):24–9. Available from: https://doi.org/10.1016/j.infrared.2018.05.001
12. Tang Q, Liu J, Dai J, Yu Z. Theoretical and experimental study on thermal barrier coating (TBC) uneven thickness detection using pulsed infrared thermography technology. Appl Therm Eng [Internet]. 2017;114:770–5. Available from: http://dx.doi.org/10.1016/j.applthermaleng.2016.12.032
13. Ranjit S, Chung Y, Kim W. Thermal Behavior Variations in Coating Thickness Using Pulse Phase Thermography. 2016;36(4):259–65.
14. Tang Q, Dai J, Liu J, Liu C, Liu Y, Ren C. Quantitative detection of defects based on Markov-PCA-BP algorithm using pulsed infrared thermography technology. Infrared Phys Technol [Internet]. 2016;77:144–8. Available from: http://dx.doi.org/10.1016/j.infrared.2016.05.027
15. Lopez F, Ibarra-Castanedo C, De Paulo Nicolau V, Maldague X. Optimization of pulsed thermography inspection by partial least-squares regression. Vol. 66, NDT and E International. 2014. p. 128–38.
16. Shepard SM, Hou YL, Lhota JR, Wang D, Ahmed T. Thermographic measurement of thermal barrier coating thickness. Thermosense XXVII. 2005;5782:407.
17. Curà F, Sesana R, Corsaro L, Mantoan R. Characterization of Thermal Barrier Coatings Using an Active Thermography Approach. Ceramics. 2022;5(4):848–61.
18. Bu C, Sun Z, Tang Q, Liu Y, Mei C. Thermography Sequence Processing and Defect Edge Identification of TBC Structure Debonding Defects Detection Using Long-Pulsed Infrared Wave Non-Destructive Testing Technology. Russ J Nondestruct Test. 2019;55(1):80–7.
19. TANG Q, GAO S, LIU Y, LU Y, XU P. Experimental Research on Ysz Tbc Structure Debonding Defect Detection Using Long-Pulsed Excitation of Infrared Thermal Wave Non-Destructive Testing. Therm Sci. 2019;23(3):1313–21.
20. Li C, Fan X, Jiang P, Jin X. Delamination-indicating of atmosphere-plasma-sprayed thermal barrier coating system using Eu3+ luminescence mapping. Vol. 222, Materials Letters. 2018. p. 41–4.
21. Tang Q, Dai J, Bu C, Qi L, Li D. Experimental study on debonding defects detection in thermal barrier coating structure using infrared lock-in thermographic technique. Appl Therm Eng [Internet]. 2016;107:463–8. Available from: http://dx.doi.org/10.1016/j.applthermaleng.2016.07.008
22. Ptaszek G, Cawley P, Almond D, Pickering S. Artificial disbonds for calibration of transient thermography inspection of thermal barrier coating systems. Vol. 1430, AIP Conference Proceedings. 2012. p. 491–8.
23. Jiao DC, Liu ZW, Zhu WY, Xie HM. Exact localization of debonding defects in thermal barrier coatings. AIAA J. 2018;56(9):3691–700.
24. Nategh K, Farahani M. Improving the Nondestructive Thermography Inspection Results for Detection of Circular Defects in Coated Metals Using Principal Component Analysis
Modares Mechanical Engineering
Volume 24, Issue 12
November 2024
Pages 717-726