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Table 2.

Test samples in relation to the applied NDT methods.

# NDT technique Identity Nominal compound Clad Al thickness (mm) Steel thickness (mm) Red (%) Sheet dimension (mm) Surface preparation Peel back (mm)
1 Active thermography AT-R AlSn20CuMn 0.67 1.96 43 280 × 171 × 2.63 Reference No peel
2 Active thermography AT-NL AlSn20CuMn 0.52 2.13 43 280 × 171 × 2.65 No linishing 13
3 Active thermography AT-RR AlSn20CuMn 0.63 2.00 30 280 × 171 × 2.63 Rolling reduction 30% 9
4 Shearography S-R AlSn20CuMn 0.53 1.22 43 280 × 171 × 1.75 Reference sample No peel
5 Shearography S-SP AlSn20CuMn 0.53 1.22 43 280 × 171 × 1.75 80 g/m2 sheet paper >5
6 Ultrasonic testing UT-R AlSn20CuMn 0.53 1.22 43 280 × 171 × 1.75 Reference sample No peel
7 Ultrasonic testing UT-NB AlSn20CuMn 0.53 1.22 43 280 × 171 × 1.75 No brushing 2
8 Guided wave EMAT GW-R AlSn20CuMn 0.53 1.22 43 800 × 171 × 1.75 Reference sample No peel
9 Guided wave EMAT GW-PT AlSn20CuMn 0.53 1.22 43 800 × 171 × 1.75 80 g/m2 paper triangle >5
10 Guided wave EMAT GW-IT AlSn20CuMn 0.53 1.22 43 800 × 171 × 1.75 Ink polluting agent 1

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