Eddy Current Test (Leaving Cert Engineering): Flashcards
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Eddy current testing definition
Eddy current testing definition
NDT using electromagnetic induction to detect flaws in non-ferrous materials
Materials eddy current testing is designed for
Materials eddy current testing is designed for
Non-ferrous materials (no iron)
Examples of non-ferrous materials
Examples of non-ferrous materials
Aluminium, copper, zinc
Definition of eddy currents
Definition of eddy currents
Small circular electrical currents induced in conductive material by magnetic field
3 equipment components for eddy current testing
3 equipment components for eddy current testing
Iron rod, copper coil, oscilloscope
How magnetic field is created in the equipment
How magnetic field is created in the equipment
Electrical current through coil creates electromagnet
How defects are detected
How defects are detected
Fluctuations in magnetic field shown on oscilloscope
Eddy current testing: contact or non-contact?
Eddy current testing: contact or non-contact?
Non-contact (probe doesn't need to touch surface)
Speed of results from eddy current testing
Speed of results from eddy current testing
Immediate feedback
Aerospace industry application
Aerospace industry application
Testing aluminium aircraft components
Electronics industry application
Electronics industry application
Quality control of copper conductors
Material conductivity requirement
Material conductivity requirement
Material must conduct electricity
Depth limitation of eddy current testing
Depth limitation of eddy current testing
Best for surface and near-surface defects
Operator skill requirement
Operator skill requirement
Requires training to interpret oscilloscope readings
Surface factors affecting test accuracy
Surface factors affecting test accuracy
Paint, coatings, contamination