Eddy current crack detection equipment
Both cracking and thickness variations can be detected.
ET Testing services are offered in our laboratories, field locations and/or customer premises.
In addition to finding cracks, eddy current can also be used to check metal hardness and conductivity in applications where those properties are of interest, and to measure thin layers of nonconductive coatings like paint on metal parts.The top curve represents.040" deep surface crack, the middle curve is.020" deep crack, and the smallest curve is.008" deep crack.That eddy current flowing through the metal will in turn generate its own magnetic field, which will interact with the coil and its field through mutual inductance.The horizontal line is the lift off in which the probe has been "nulled" (balanced) on the aluminum part and when it 2013 team manual provisional is lifted in the air, the signal moves directly to the left.It can even send you E-mails at your scheduled times with all test data, statistics and error conditions.For example, the display below shows a setup for inspection for surface cracks in aluminum.
Our certified staff of NDT professionals provides eddy current testing services to a broad range of industries throughout the US and abroad.
This inspection is done with a pencil probe.
Once the parameters are set, they should not be changed during the inspection.How it works, eddy current testing is based on the physics phenomenon of electromagnetic induction.If the probe and its magnetic field are brought close to a conductive material like a metal test piece, a circular flow of electrons known as an eddy current will begin to move through the metal like swirling water in a stream.Flawmark-EX is a highly advanced thoroughbred from theTechnofour stables.This measurement is most commonly used to determine the conductivity of a material but it will also provide the thickness of a coating which is considered the "Liftoff" from the material or how far the probe is above the surface of the conductive material.In some cases, eddy current and ultrasonic testing are used together as complementary techniques, with eddy current having an advantage for quick surface testing and ultrasonics having better depth penetration.ECA can permit use of simpler fixturing, and can also simplify inspection of complex shapes through custom probes built to fit the profile of the test piece.Magnetism, the underlying principle behind electric motors and generators, relays and stereo speakers, is also the force that enables an important category of NDT tools called eddy current instruments.
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