Non destructive testing methods

Non Destructive Testing Methods

Non destructive testing where destruction or deformation does not involve. Testing without breaking any part is called NDT or non destructive testing. Non destructive testings are used by industries to evaluate the properties of materials, parts or components, structures, assemblies for characteristics difference, defects and discontinuities without any damage in original parts. 

NDT is also known non destructive examination (NDE), non destructive inspection (NDI).

Difference between destructive testing and non destructive testing: 

Destructive testing is a technique where properties and characteristics of materials are evaluated, defects and damages are analysed by deforming original parts. A piece of material is scraped away from part for testing for eg micro sectioning in welding, testing of roads etc or sometime complete part would be destroyed for testing for eg. tensile testing, impact testing, hardness testing etc. Destructive testing is generally used for failure investigation, material behaviour and characteristics and performance of specimen.

Non destructive testing are used for same purpose without any failure or destruction in specimen like inspection with x rays, radiography etc.

Non Destructive Testing Methods :

  1. Visual Non Destructive Testing
  2. Ultrasonic Non Destructive Testing
  3. Radiography Non Destructive Testing
  4. Eddy Current Non Destructive Testing
  5. Magnetic Particle Non Destructive Testing
  6. Leak testing 
  7. Liquid Penetration
  8. Acoustic Emission Testing


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