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WEL-COME
Maharashtra State Board Technical Education,Mumbai.
VVCT’SAbhaysinhraje Bhonsale Institute of Technology ,
Shahunagar,Shendre. Seminar Report
PRESENTED BY………
1. Suryawanshi Poonam2. Kandalkar Komal3. Salunkhe Ashwini4. Jadhav Rachana5. Ombale Monika
Subject:
Non-destructive testing (NDT)
Definition:
Non-destructive testing is a wide group of analysis techniques used in science and industry to evaluate the properties of a material , component or system without causing damage.
Types Of NDT
PENETRANT TESTING
MAGNETIC PARTICLE TESTING
ULTRASONIC TESTING
EDDY CURRENT TESTING
RADIOGRAPHIC TESTING
Penetrant Testing
Scientific Principles Penetrant solution is applied to the surface of pre-cleaned
component. The liquid is pulled into surface-breaking defects by capillary action
Main uses Used to locate cracks and other defects that break the surface
of a material and have enough volume to trap and hold the penetrant material
Main advantages Large surface areas or large volumes of parts/materials can be
inspected rapidly and at low cost
Disadvantages Detects only surface breaking defects
Magnetic particles testing
Scientific principles A magnetic field is established in a component made from
ferromagnetic material
Main uses Used to inspect ferromagnetic material for defects that results in
transition in the magnetic permeability a material
Main advantages Large surface areas of complex parts can be inspected rapidly. Can
detect surface and sub surface flaws
Disadvantages Only ferromagnetic materials can be inspected
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Ultrasonic Testing
Scientific principles High frequency sound waves are send into a material by use of a
transducer
Main uses Used to locate surface and sub surface defects in many materials including
materials including metals , plastics and wood.
Main advantages Only singles sided access is required.
Provides distance information.
Minimum part preparation is required.
Disadvantages Surface must be accessible to probe and complaint.
Skill and training required is more extensive than other techniques
Radio Graphic Testing
Scientific principles X-ray are used to produce images of objects using film or other detector
that is sensitive to radiation
Main uses Used to inspect almost any material for surface and subsurface defects.
X-ray can also be used to locates and measures internal features, confirm the location of hidden parts in an a assembly , and to measure thickness of materials
Main advantages Defects surface and sub surface defects.
Disadvantages Extensive operator training and skill required.
Access to both sides of the structure is usually required.
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