Engineers Edge

Eddy Current Non-Destructive Inspection Method (NDI) for Metals

Quality and Inspection Process Knowledge
Quality and Inspection Services

Eddy current is used to detect surface cracks, pits, subsurface cracks, corrosion on inner surfaces, and to determine alloy and heat-treat condition.

A wide variety of eddy current test instruments are available. The eddy current test instrument performs three basic functions: generating, receiving, and displaying. The generating portion of the unit provides an alternating current to the test coil. The receiving section processes the signal from the test coil to the required form and amplitude for display. Instrument outputs or displays consist of a variety of visual, audible, storage, or transfer techniques utilizing meters, video displays, chart recorders, alarms, magnetic tape, computers, and electrical or electronic relays.

Principles of Operations: Eddy currents are induced in a test article when an alternating current is applied to a test coil (probe). The alternating current in the coil induces an alternating magnetic field in the article which causes eddy currents to flow in the article. 

Generating an Eddy Current

Detecting an Eddy Current

Contribute Article Spider Optimizer

© Copyright 2000 - 2018, by Engineers Edge, LLC
All rights reserved
Disclaimer | Feedback
Advertising | Contact | Privacy Policy


Spider Optimizer

Engineering Book Store
Engineering Forum
Excel App. Downloads
Online Books & Manuals
Engineering News
Engineering Videos
Engineering Calculators
Engineering Toolbox
GD&T Training Geometric Dimensioning Tolerancing
DFM DFA Training
Training Online Engineering
Advertising Center

Copyright Notice

Publishing Program