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Table 11.
Feasibility of NDT techniques to fulfil Al-Sn alloy/steel online inspection requirements.
| NDT technique/criteria | Delamination detection capability | Inspection speed for in-line application >12 /min | Compatability with Al-Sn alloy/steel bimetal material properties | Surface irregularities: scratches, oil, specular and matt appearance | Strong rigid-body motion and vibration | Ambient conditions changes: light/temperature |
|---|---|---|---|---|---|---|
| Thermography | ✓ | ✓ | ✓ | ⨉ | ⨉ | ⨉ |
| Laser shearography | ✓ | ✓ | ✓ | ⨉ | ⨉ | ⨉ |
| Ultrasound | ✓ | ⨉ | ✓ | ✓ | ✓ | ✓ |
| Guided wave EMATs | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
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