| X-ray
Application - Detection of internal flaws and defects
such as cracks, corrosion, inclusions and thickness variations.
Advantages
 | Eliminates many disassembly requirements particularly for airframe
structures. |
| The method has a high sensitivity. |
| The method provides a permanent record of the inspection on film. |
Disadvantages
| Radiation hazard. |
| Trained operators and film processing equipment required. |
| Cracks orientated in a normal plane to the x-ray beam may not be
detected. |
| Electrical source is required. |
Above - Safety lamps and warning boards are used
to keep people out of areas where Radiographic examinations are being
carried out.
|
|
Above - Preparing to carry out radiographic
examination of aircraft structure
Gamma ray
Application - Detection of internal flaws and defects
such as cracks, corrosion, inclusions and thickness variations.
Advantages
| Useful in making radiographs of areas where x-rays may not be
possible either for reasons of access or material thickness. |
| No electrical source required. |
Disadvantages
| Radiation hazard. |
| Trained operators and film processing equipment is required. |
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