Open Access

Table 10.

Advantages and limitations of guided waves using EMAT bond inspection of Al-Sn alloy/steel bimetal strip.

Advantages Limitations
Ultrasound directly interrogates and interacts with delamination. Rigid mechanical integration required to avoid any lift offs between test specimen and probe.
High reproducibility and repeatability, not dependent on operator. High calibration effort.
No requirement for coupling media or immersion bath. No commercial system exists, need to be adapted for Al-Sn alloy/steel bimetal strip.
Material surface irregularities do not affect the test results.
No mechanical loading required.
100% Volume inspection due to guided waves.
Low Signal-to-Noise ratio possible.
Fast automated inspection possible.

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