Active IR Thermography Evaluation of Coating Thickness by Determining Apparent Thermal Effusivity

Pulsed thermography is a common technique for nondestructive testing (NDT) of materials. This study presents the apparent effusivity method for the quantitative evaluation of coating thickness in a one-sided thermal NDT procedure. The proposed algorithm is based on determining a threshold value of a...

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Main Authors: Alexey Moskovchenko, Vladimir Vavilov, Michal Švantner, Lukáš Muzika, Šárka Houdková
Format: Article
Language:English
Published: MDPI AG 2020-09-01
Series:Materials
Subjects:
Online Access:https://www.mdpi.com/1996-1944/13/18/4057
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spelling doaj-c6dd98f08a22456cbe8ac88a91949f282020-11-25T03:48:07ZengMDPI AGMaterials1996-19442020-09-01134057405710.3390/ma13184057Active IR Thermography Evaluation of Coating Thickness by Determining Apparent Thermal EffusivityAlexey Moskovchenko0Vladimir Vavilov1Michal Švantner2Lukáš Muzika3Šárka Houdková4New Technologies—Research Centre, University of West Bohemia, Univerzitní 8, 301 00 Plzeň, Czech RepublicSchool of Nondestructive Testing, Tomsk Polytechnic University, 30, Lenin Avenue, 634050 Tomsk, RussiaNew Technologies—Research Centre, University of West Bohemia, Univerzitní 8, 301 00 Plzeň, Czech RepublicNew Technologies—Research Centre, University of West Bohemia, Univerzitní 8, 301 00 Plzeň, Czech RepublicNew Technologies—Research Centre, University of West Bohemia, Univerzitní 8, 301 00 Plzeň, Czech RepublicPulsed thermography is a common technique for nondestructive testing (NDT) of materials. This study presents the apparent effusivity method for the quantitative evaluation of coating thickness in a one-sided thermal NDT procedure. The proposed algorithm is based on determining a threshold value of apparent effusivity, which can be found for particular coating-on-substrate structures. It has been found that the square root of the time at which the apparent effusivity curve reaches this threshold is proportional to the coating thickness. The efficiency of the proposed approach is demonstrated by analytical modeling and experimentation performed on thermally-sprayed coatings.https://www.mdpi.com/1996-1944/13/18/4057pulse thermographycoating thicknessapparent effusivitythermal NDTthermally sprayed coatingsthermographic testing
collection DOAJ
language English
format Article
sources DOAJ
author Alexey Moskovchenko
Vladimir Vavilov
Michal Švantner
Lukáš Muzika
Šárka Houdková
spellingShingle Alexey Moskovchenko
Vladimir Vavilov
Michal Švantner
Lukáš Muzika
Šárka Houdková
Active IR Thermography Evaluation of Coating Thickness by Determining Apparent Thermal Effusivity
Materials
pulse thermography
coating thickness
apparent effusivity
thermal NDT
thermally sprayed coatings
thermographic testing
author_facet Alexey Moskovchenko
Vladimir Vavilov
Michal Švantner
Lukáš Muzika
Šárka Houdková
author_sort Alexey Moskovchenko
title Active IR Thermography Evaluation of Coating Thickness by Determining Apparent Thermal Effusivity
title_short Active IR Thermography Evaluation of Coating Thickness by Determining Apparent Thermal Effusivity
title_full Active IR Thermography Evaluation of Coating Thickness by Determining Apparent Thermal Effusivity
title_fullStr Active IR Thermography Evaluation of Coating Thickness by Determining Apparent Thermal Effusivity
title_full_unstemmed Active IR Thermography Evaluation of Coating Thickness by Determining Apparent Thermal Effusivity
title_sort active ir thermography evaluation of coating thickness by determining apparent thermal effusivity
publisher MDPI AG
series Materials
issn 1996-1944
publishDate 2020-09-01
description Pulsed thermography is a common technique for nondestructive testing (NDT) of materials. This study presents the apparent effusivity method for the quantitative evaluation of coating thickness in a one-sided thermal NDT procedure. The proposed algorithm is based on determining a threshold value of apparent effusivity, which can be found for particular coating-on-substrate structures. It has been found that the square root of the time at which the apparent effusivity curve reaches this threshold is proportional to the coating thickness. The efficiency of the proposed approach is demonstrated by analytical modeling and experimentation performed on thermally-sprayed coatings.
topic pulse thermography
coating thickness
apparent effusivity
thermal NDT
thermally sprayed coatings
thermographic testing
url https://www.mdpi.com/1996-1944/13/18/4057
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AT michalsvantner activeirthermographyevaluationofcoatingthicknessbydeterminingapparentthermaleffusivity
AT lukasmuzika activeirthermographyevaluationofcoatingthicknessbydeterminingapparentthermaleffusivity
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