23-07-2014, 04:48 PM
Nondestructive Testing Methods
1378528822-SEMINARME3G.pptx (Size: 549.7 KB / Downloads: 35)
NDT
NDT is a method of detecting internal or external defects without breaking the material
IMPORTANCE OF NDT
It is used to determine the properties of the materials by testing the internal or external surface of the material
EX: Aircraft skin need regular checking to detect cracks.
ADVANTAGES OF NDT:
1. used as quality control tool.2.100 % testing is possible.
LIMITATION OF NDT :
1.cost of equipment is high.2.only certified trainers can conduct NDT.
TYPES OF NDT
1.RADIOGRAGHY.2.ULTRASONIC TESTING.3.LPT
ADVANTAGES
it is very fast test method.LIMITATIONS : x-ray have less penetration power
1.Its sensitivity is high.2.It has better accuracy
LIMITATIONS :
Irregular shaped and rough parts are very difficult to examine
LIQUID PENETRANT TESTING
Principle :IT works on the principle of capillarity