Non Destructive Testing Methods (NDT Process)

liquid Penetrant testing, Eddy current test, Ultrasonic Testing, Radiography, Magnetic Particle Method, Leak Testing,NDE

What you will learn

Non Destructive Testings of metals, machines and components

Visual Testing and Advantages & Disadvantages

Die Penetrant Testing and Advantages & Disadvantages

Magnetic Particle Testing and Advantages & Disadvantages

Eddy Current Testing and Advantages & Disadvantages

Ultrasonic Testing and Advantages & Disadvantages

Radiography Testing and Advantages & Disadvantages

Acoustic Emission and Advantages & Disadvantages

Leak Testing, Vibration Analysis


Non Destructive testing (NDT) is the process of inspecting, testing, or evaluating materials, components or assemblies for discontinuities, or differences in characteristics without destroying the serviceability of the part or system. In other words, when the inspection or test is completed the part can still be used.

In contrast to NDT, other tests are destructive in nature and are therefore done on a limited number of samples (“lot sampling”), rather than on the materials, components or assemblies actually being put into service.

These destructive tests are often used to determine the physical properties of materials such as impact resistance, ductility, yield and ultimate tensile strength, fracture toughness and fatigue strength, but discontinuities and differences in material characteristics are more effectively found by NDT.


Today modern nondestructive tests are used in manufacturing, fabrication and in-service inspections to ensure product integrity and reliability, to control manufacturing processes, lower production costs and to maintain a uniform quality level. During construction, NDT is used to ensure the quality of materials and joining processes during the fabrication and erection phases, and in-service NDT inspections are used to ensure that the products in use continue to have the integrity necessary to ensure their usefulness and the safety of the public.

It should be noted that while the medical field uses many of the same processes, the term “nondestructive testing” is generally not used to describe medical applications.

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Course Introduction & Overview
What is NDT & Why to Learn it ?

Visual Testing Methods

Visual testing
Advantages & Disadvantages of Visual Testing

Dye or Liquid Penetrate Testing

Dye Penetrant or Liquid Penetrant Method
Advantages & Disadvantages of DPT

Magnetic Partical Testings

Magnetic Particle Testing Method
Advantages & Disadvantages of MPT

Ultrasonic Testing

Ultrasonic Testing
Advantages & Disadvantages of Ultrasonic testing

Eddy Current Testing

Eddy Current Testing
Advantages & Disadvantages of eddy Current Testings

Radiography testing

Radiography Testing
Radiography Advantages & Disadvantages

Acoustic Emission Testing

Acoustic Emission Testing
Advantages & Disadvantages of Acoustic Emission Testing
Acoustic Emission Quiz

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