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Radiographic Inspection

Last updated: August 5, 2020

What Does Radiographic Inspection Mean?

Radiographic inspection is the process of evaluating material using x-ray or gamma-ray technology. It is one of the most thorough methods of non-destructive testing which is used to evaluate objects for signs of flaws which could interfere with functionality.


Corrosionpedia Explains Radiographic Inspection

With radiographic inspection, flaw detection is based on differential absorption of penetrating radiation by the part or test piece being inspected. Because of differences in density and variations in thickness of the part, or differences in absorption characteristics caused by variation in composition, different portions of a test piece absorb different amounts of penetrating radiation. Unabsorbed radiation passing through the part can be recorded on film or photosensitive paper, viewed on a florescent screen or monitored by various types of electronic radiation detectors.

diagram of radiographic inspection, radiography

The two types of radiation that are commonly used for inspection purpose are x-rays and gamma rays.

Radiographic testing is used extensively on castings and weldments. Radiography is well suited to the testing of semiconductor devices for cracks, broken wires, unsoldered connections, foreign material and misplaced components. Sensitivity of radiography to various types of flaws depends on many factors, including type of material, type of flaw and product form. Ferrous alloys can be radiographed, as can non-metallic materials and composites.


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