Non-Destructive Testing

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Radiography Inspection


Radiography is very useful for detecting hidden flaws in materials and fabrications. In particular, it is exceptionally good at detecting volumetric flaws such as voids, gas pores and solid inclusions. The nature and dimension (length and width) of flaws are also easily recognized although it cannot be used to measure the thickness of defects.

Another benefit of this technology is that it provides a permanent record of the flaw. This is done by putting the item being inspected onto a photographic film. In order to do this a source of ionising radiation is positioned at one side of the item that is to be inspected, and a photographic film is placed in close proximity to the other side. The radiation is then partly absorbed during transmission and differences in material thickness or absorption qualities are recorded on the film.