TY - JOUR
T1 - One-dimensional photothermal characterization of subsurface interfaces utilizing the virtual wave concept
AU - Gahleitner, L.
AU - Thummerer, G.
AU - Mayr, G.
AU - Mayr, G.
AU - Burgholzer, P.
AU - Cakmak, U.
N1 - Publisher Copyright:
© 2023 The Author(s)
PY - 2024/1
Y1 - 2024/1
N2 - This work presents one-dimensional photothermal results for estimating subsurface interface parameters using the virtual wave concept. The performed study demonstrates the capability of the virtual wave concept as a feature extraction method for estimating the depth position and thermal mismatch of subsurface interfaces within layered materials. The mathematical relationship between the reflection coefficient of the thermal wave and the signal of the virtual wave is demonstrated for exact one-dimensional solutions. For experimental validation, pulsed thermography in the pulse-echo configuration for different metallic specimens is applied. This method yields a very good estimation of the interfacial parameters for the analyzed samples. In summary, a feasible and fast one-dimensional photothermal evaluation of subsurface interfaces using the virtual wave concept is demonstrated.
AB - This work presents one-dimensional photothermal results for estimating subsurface interface parameters using the virtual wave concept. The performed study demonstrates the capability of the virtual wave concept as a feature extraction method for estimating the depth position and thermal mismatch of subsurface interfaces within layered materials. The mathematical relationship between the reflection coefficient of the thermal wave and the signal of the virtual wave is demonstrated for exact one-dimensional solutions. For experimental validation, pulsed thermography in the pulse-echo configuration for different metallic specimens is applied. This method yields a very good estimation of the interfacial parameters for the analyzed samples. In summary, a feasible and fast one-dimensional photothermal evaluation of subsurface interfaces using the virtual wave concept is demonstrated.
KW - Inverse 1D heat conduction problem
KW - Layered materials
KW - Photothermal reconstruction
KW - Thermal wave reflection coefficient
KW - Virtual wave concept
UR - http://www.scopus.com/inward/record.url?scp=85184657607&partnerID=8YFLogxK
U2 - 10.1016/j.ndteint.2023.102994
DO - 10.1016/j.ndteint.2023.102994
M3 - Article
SN - 0963-8695
VL - 141
SP - 102994
JO - NDT & E INTERNATIONAL
JF - NDT & E INTERNATIONAL
M1 - 102994
ER -