Introduction to NDT

Nondestructive testing (NDT) is any of a wide group of analysis techniques used in science and technology industry to evaluate the properties of a material, component or system without causing damage. The terms nondestructive examination (NDE), nondestructive inspection (NDI), and nondestructive evaluation (NDE) are also commonly used to describe this technology. Because NDT does not permanently alter the article being inspected, it is a highly valuable technique that can save both money and time in product evaluation, troubleshooting, and research. There are sixteen different inspection methods used in NDT, seven of the sixteen are the most commonly used. These methods are ultrasonics, radiography, eddy current, liquid penetrant, magnetic particle, visual and magnetic flux leakage. NDT is commonly used in engineering, mechanical engineering, petroleum engineering, electrical engineering, civil engineering, systems engineering and aeronautical engineering.
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Introduction To NDT Training Course:

NDT methods rely upon use of electromagnetic radiation, acoustics and other signal conversions to examine a wide variety of articles (metallic and non-metallic, artifacts and infrastructure) for integrity, composition, or condition with no alteration of the article undergoing examination. Visual inspection (VT), the most commonly applied NDT method, is quite often enhanced by the use of magnification, borescopes, cameras, or other optical arrangements for direct or remote viewing. The internal structure of a sample can be examined for a volumetric inspection with penetrating radiation (RT), such as X- or gamma radiation. Sound waves are utilized in the case of ultrasonic testing (UT), another volumetric NDT method – the mechanical signal (sound) being reflected by conditions in the test article and evaluated for amplitude and distance from the search unit (transducer). Another commonly used NDT method used on ferrous materials involves the application of fine iron particles (either suspended in liquid or dry powder – fluorescent or colored) that are applied to a part while it is magnetized, either continually or residually. The particles will be attracted to leakage fields of magnetism on or in the test object, and form indications (particle collection) on the object’s surface, which are evaluated visually. Contrast and probability of detection for a visual examination by the unaided eye is often enhanced by using liquids to penetrate the test article surface, allowing for visualization of flaws or other surface conditions. This method (liquid penetrant testing) (PT) involves using dyes, fluorescent or colored, suspended in fluids and is used for non-magnetic materials.

This 8- hour training program was developed to instruct students on the fundamental basics of nondestructive testing. Students will learn the various inspection methods used in NDT, what industries utilize what methods and discontinuity classifications.

This is an online only course. 218-851-8347