TY - JOUR

T1 - Comparison of Inductive Thermography and Computer Tomography Results for Short Surface Cracks

AU - Oswald-Tranta, Beata

PY - 2023/11/14

Y1 - 2023/11/14

N2 - Inductive thermography is a non-destructive testing method, whereby the workpiece to be inspected is slightly heated by a short inductive heating pulse. An infrared camera records the surface temperature during and after the heating pulse. As defects influence the induced eddy current distribution and the heat flow, they become highly visible in the evaluated infrared images. The deeper a crack is, the greater the obstacle it represents. In Inconel welded samples, short surface cracks (length 0.3–2 mm) were created using a so-called Varestraint test machine. The samples were inspected via inductive thermography and computer tomography (CT). Additional finite element simulations were calculated in order to model the thermography experiments. The comparison of the thermographic, CT and simulation results shows how the thermographic signal of a defect depends on its geometry. This information can be used for calibration to estimate the crack properties based on the thermographic inspection.

AB - Inductive thermography is a non-destructive testing method, whereby the workpiece to be inspected is slightly heated by a short inductive heating pulse. An infrared camera records the surface temperature during and after the heating pulse. As defects influence the induced eddy current distribution and the heat flow, they become highly visible in the evaluated infrared images. The deeper a crack is, the greater the obstacle it represents. In Inconel welded samples, short surface cracks (length 0.3–2 mm) were created using a so-called Varestraint test machine. The samples were inspected via inductive thermography and computer tomography (CT). Additional finite element simulations were calculated in order to model the thermography experiments. The comparison of the thermographic, CT and simulation results shows how the thermographic signal of a defect depends on its geometry. This information can be used for calibration to estimate the crack properties based on the thermographic inspection.

UR - https://www.mdpi.com/2673-4591/51/1/36

U2 - 10.3390/engproc2023051036

DO - 10.3390/engproc2023051036

M3 - Article

VL - 51.2023

JO - Engineering proceedings

JF - Engineering proceedings

SN - 2673-4591

IS - 1

M1 - 36

T2 - Advanced Infrared Technology and Applications

Y2 - 10 September 2023 through 13 September 2023

ER -