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The dye penetrant testing is most sensitive
Ultrasound testing machine (UT).
PT ( Liquid Penetrant Testing) ,UT ( Ultrasonic Testing ) & ET ( Eddy Current Testing)
Liquid Penetrant Test, with flourescent dye and Ultra-sonic flaw detection
Eddy current method is suitable for aviation industry.
dye penetrant testing for castingand eddy current for heat exchangers.
I think UT and LPT is better option
Aviation part for example is a airplane body for surface defect you can use Dye Penetrant, Eddy Current Testing, and Ultrasonic Test using shear wave testing.
Eddy current Testing is best suitable for aviation .
Fluorescent penetrant inspection (FPI) which nothing a Dry Penetrant inspection is more sensitive for surface defect detection but for detection of internal flaws, UT is much useful as it can detect very small discontinuity .... but It is fully depend upon type & metallurgy of spare part which is subjected for inspection.
