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AFGROW | DTD Handbook

Handbook for Damage Tolerant Design

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Section 3.1.1.0. NDI Methods

There are six commonly-used NDI techniques, and two others are expected to receive widespread acceptance and application.  These eight methods are visual, liquid penetrant, eddy current, ultrasonic, magnetic particle, radiography, thermographic and acoustic emission inspections.  Each of these is briefly described in the following paragraphs.