Identification of coating damage processes in corroded galvanized steel by acoustic emission wavelet analysis

Gallego, Antolino; Gil, José F.; Castro, Emilio Mata de; Piotrkowski, Rosa

doi:10.1016/j.surfcoat.2006.10.018

Cited by 36 publications

(25 citation statements)

References 14 publications

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“…Different fracture modes would generate different types of AE signals with various AE amplitudes [18] . AE events and amplitudes are generally analyzed by the Fourier or wavelet analysis [16,19,20] . In this paper, AE data were performed by using the discrete Fourier transform to obtain their characteristic frequency spectrums, which ascribe to different fracture sources [21,22] .…”

Section: Fracture Mode and Ae Signal Analysismentioning

confidence: 99%

Acoustic emission analysis on tensile failure of air plasma-sprayed thermal barrier coatings

Yao

Dai

Mao

et al. 2012

Surface and Coatings Technology

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An acoustic emission technique was used to monitor the cracking behavior and fracture process of thermal barrier coatings subjected to tensile loading. Acoustic emission signals were extracted and preformed by fast Fourier transform, and their characteristic frequency spectrums and dominant bands were obtained to reveal fracture modes. Three different characteristic frequency bands were confirmed, corresponding to substrate deformation, surface vertical cracking and interface delamination, with the aid of scanning electronic microscopy observations. A map of the tensile failure mechanism of air plasma-sprayed thermal barrier coatings was HighlightsWe established several good correlations between AE data and fracture modes.The correlations can be utilized to reveal cracking profile and coating failure.A tensile failure mechanism of coating system was established.Fracture strength of thermal barrier coating has been obtained by this method.The method has a large advantage to study the failure of coating/film materials.

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Section: Fracture Mode and Ae Signal Analysismentioning

confidence: 99%

Acoustic emission analysis on tensile failure of air plasma-sprayed thermal barrier coatings

Yao

Dai

Mao

et al. 2012

Surface and Coatings Technology

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“…The appropriate position of the AE sensor near the emission zone during the scratch test is of the highest importance. Small sensors can be placed on the mount of the scratching tip [75,78,79] or glued to the surface of sample [80,81]. Both solutions are often used in practice and both possess some advantages and disadvantages.…”

Section: Acoustic Emission Introductionmentioning

confidence: 99%

On the Importance of Combined Scratch/Acoustic Emission Test Evaluation: SiC and SiCN Thin Films Case Study

et al. 2018

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Abstract:The scratch test, as probably the most widespread technique for assessment of the adhesive/cohesive properties of a film-substrate system, fully depends on reliable evaluation based on assessment of critical loads for systems' failures. Traditionally used evaluation methods (depth change record and visual observation) may sometimes give misleading conclusions about the failure dynamics, especially in the case of opaque films. Therefore, there is a need for another independent evaluation technique with the potential to complete the existing approaches. The nondestructive method of acoustic emission, which detects the elastic waves emitted during film cracking and delamination, can be regarded as a convenient candidate for such a role even at nano/micro scale. The strength of the combination of microscopic observation of the residual groove and depth change record with the acoustic emission detection system proved to be a robust and reliable approach in analyzing adhesion/cohesion properties of thin films. The dynamics of the gradual damage taking place during the nano/micro scratch test revealed by the combined approach is presented for SiC and SiCN thin films. Comparison of critical load values clearly reflects the higher ability of the AE approach in detecting the initial material failure compared to the visual observation.

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“…Acoustic emission wavelet analysis-on the other hand seems to be a good technique for assessing the coating adherence failure at phase interfaces [15]. However, this technique does not use the measured force-displacement of the scratch test.…”

Section: Introductionmentioning

confidence: 99%

Identification of critical load for scratch adhesion strength of nitride-based thin films using wavelet analysis and a proposed analytical model

Hassan

Bushroa

Mahmoodian

2015

Surface and Coatings Technology

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Identification of coating damage processes in corroded galvanized steel by acoustic emission wavelet analysis

Cited by 36 publications

References 14 publications

Acoustic emission analysis on tensile failure of air plasma-sprayed thermal barrier coatings

Acoustic emission analysis on tensile failure of air plasma-sprayed thermal barrier coatings

On the Importance of Combined Scratch/Acoustic Emission Test Evaluation: SiC and SiCN Thin Films Case Study

Identification of critical load for scratch adhesion strength of nitride-based thin films using wavelet analysis and a proposed analytical model

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