General Principles of Radiography :
The part is placed between the radiation source and a piece of film. The part will stop some of the radiation. Thicker and more dense area will stop more of the radiation.
The film darkness (density) will vary with the amount of radiation reaching the film through the test object.
Tag: principle
General Principal Of Radiography:
1. The energy of the radiation affects its penetrating power. Higher energy radiation can penetrate thicker and more dense materials.
2. The radiation energy and/or exposure time must be controlled to properly image the region of interest.
Discontinuities at or near the surface produce magnetic leakage field on the surface :
Magnetic flux in a magnetized part pass through the body of the part. Discontinuities at or near the surface of the part disturb the normal flow of magnetic flux and leakage flux fields are produced on the surface above the discontinuities. These leakage fields attract iron particles and are detected by applying iron powders.
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