Failure Mechanisms and Defect Detection Techniques of Thermal Barrier Coatings

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Structural Integrity of Metals".

Deadline for manuscript submissions: closed (30 April 2024) | Viewed by 1136

Special Issue Editor

Institute of Structural Health Monitoring, Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang 212013, China
Interests: structural integrity assessment; fatigue and fracture of metallic materials; metal additive manufacturing; optical experimental mechanics

Special Issue Information

Dear Colleagues,

Thermal barrier coatings (TBCs) have been widely used in a variety of gas-turbine and aero-engine applications. TBC systems provide the necessary thermal protection in gas turbines and aero engines, and thus have been certified as being a significant technology for reducing the surface temperature of substrate components. Since there are critical demands to improve the overall system efficiency, investigations into TBC systems are being extensively conducted so as to prolong their lifetime and to increase their service temperature. In this regard, the degradation and failure of TBCs is an extrinsic and intrinsic topic. However, TBC systems inherently contain a certain amount of macro- and micro-defects which cannot be eliminated completely. These defects are apparently of critical importance regarding the failure of these TBC systems. Thus, it is important to understand the failure mechanisms and grasp the defect defection testing and evaluation techniques for TBCs, so as to improve the performance of TBCs under real service conditions.

This Special Issue will publish the results of pioneering research on the developments in the underlying theory and novel applications of failure mechanisms and defect detection techniques of thermal barrier coatings. Articles may include in-depth research on failure mechanisms, failure analysis of TBC materials, structures or systems based on material characterization methods, and numerical simulations. Studies of conventional defect detection techniques, including radiography, ultrasound, eddy currents, magnetic properties and magnetic particle inspection, thermal imaging, and dye penetrant, as well as those covering new topics, high-quality findings from related research areas including structural health and condition monitoring abd sensor technology, and new techniques for simulation and modelling, are welcome.

Dr. Jian Li
Guest Editor

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Keywords

  • thermal barrier coating
  • failure mechanisms
  • defect detection techniques
  • material characterization
  • numerical simulations
  • structural health and condition monitoring
  • sensor technology

Published Papers (1 paper)

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Research

12 pages, 2613 KiB  
Article
Application of Damage Detection of Metal Structure Lamb Wave Modal Superposition Imaging Based on Scanning Laser Vibration Measurement
by Ziping Wang, Bingqian Li, Hangrui Cui, Rahim Gorgin, Jian Li and Yang Zhang
Metals 2023, 13(10), 1668; https://doi.org/10.3390/met13101668 - 28 Sep 2023
Viewed by 810
Abstract
Metal structural plates are extensively used in various engineering structures due to their high strength, high-temperature resistance, toughness, and plasticity. However, they are susceptible to damage from external loads and impacts over time. The current Lamb wave detection methods suffer from dispersion and [...] Read more.
Metal structural plates are extensively used in various engineering structures due to their high strength, high-temperature resistance, toughness, and plasticity. However, they are susceptible to damage from external loads and impacts over time. The current Lamb wave detection methods suffer from dispersion and multimodal effects, leading to ineffective identification of damage information. In this paper, we investigate Lamb wave propagation in steel structure plates with flat-bottomed holes using a sinusoidal modulation five-peak wave signal. Finite element numerical models are developed, and an experimental platform is constructed using steel and aluminum boards. Experimental data is collected using a Scanning Laser Doppler Vibrometer (SLDV, PSV-500, Polytec Inc., Baden-Württemberg, German). The results demonstrate that, under the same frequency, the damage reflection energy for different modes is distinct. By fusing the data from the two modes, more accurate damage imaging results are obtained in the frequency-wavenumber (f-k) domain compared to single-mode imaging. Furthermore, experiments are conducted to locate damage in a steel board with a through hole and an aluminum plate with double flat-bottomed holes, confirming the feasibility of the proposed algorithm in isotropic plates. Full article
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