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2. Eddy-current testing - Wikipedia

   en.wikipedia.org/wiki/Eddy-current_testing

   In the traditional version of eddy current testing an alternating (AC) magnetic field is used to induce eddy currents inside the material to be investigated. If the material contains a crack or flaw which make the spatial distribution of the electrical conductivity nonuniform, the path of the eddy currents is perturbed and the impedance of the ...

3. Eddy current - Wikipedia

   en.wikipedia.org/wiki/Eddy_current

   In electromagnetism, an eddy current (also called Foucault's current) is a loop of electric current induced within conductors by a changing magnetic field in the conductor according to Faraday's law of induction or by the relative motion of a conductor in a magnetic field. Eddy currents flow in closed loops within conductors, in planes ...

4. Remote field testing - Wikipedia

   en.wikipedia.org/wiki/Remote_field_testing

   Remote field testing (RFT) is a method of nondestructive testing using low-frequency AC. whose main application is finding defects in steel pipes and tubes. [1] RFT is also referred to as remote field eddy current testing ( RFEC or RFET ). [ 2 ]

5. Electromagnetic testing - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_testing

   If the test is set up properly, a defect inside the test object creates a measurable response. The term "electromagnetic testing" is often intended to mean simply eddy-current testing (ECT). However, with an expanding number of electromagnetic and magnetic test methods, "electromagnetic testing" is more often used to mean the whole class of ...

6. Eddy (fluid dynamics) - Wikipedia

   en.wikipedia.org/wiki/Eddy_(fluid_dynamics)

   In fluid dynamics, an eddy is the swirling of a fluid and the reverse current created when the fluid is in a turbulent flow regime. [2] The moving fluid creates a space devoid of downstream-flowing fluid on the downstream side of the object.

7. Alternating current field measurement - Wikipedia

   en.wikipedia.org/wiki/Alternating_Current_Field...

   Alternating current field measurement (ACFM) is an electromagnetic technique for non-destructive testing detection and sizing of surface breaking discontinuities. It was derived from the methods used in eddy-current testing and works on all metals, ferrous or non-ferrous. Since it doesn't require direct electrical contact with the surface it ...