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Both X-Ray and Ultrasonic testing of materials are non-destructive tests (NDT) used to find internal flaws in aircraft engine components - Leaving Cert Engineering - Question c - 2020
Question c
Both X-Ray and Ultrasonic testing of materials are non-destructive tests (NDT) used to find internal flaws in aircraft engine components. Compare X-Ray NDT and Ultra... show full transcript
Worked Solution & Example Answer:Both X-Ray and Ultrasonic testing of materials are non-destructive tests (NDT) used to find internal flaws in aircraft engine components - Leaving Cert Engineering - Question c - 2020
Step 1
Equipment used
Answer
X-Ray NDT utilizes X-ray radiation to penetrate materials, producing an internal photographic image of the test piece. It requires a cathode to release electrons which are then accelerated towards an anode. In contrast, Ultrasonic NDT uses a quartz crystal to generate high-frequency vibrations that are transmitted through the material being tested.
Step 2
Method of operation
Answer
In X-Ray NDT, the X-ray exposes the test piece, which allows it to capture an image of any internal flaws or cavities. Any flaw or cavity will be visible on the image plate since the radiation will not pass through the defect. On the other hand, Ultrasonic NDT sends vibrations through the tested material. If there are internal defects or voids, these will cause changes in the vibrations that are then reflected back to a receiver and displayed on a screen.
Step 3
Safety considerations
Answer
X-Ray NDT requires proper shielding due to the health risks associated with X-ray exposure, as prolonged exposure can be carcinogenic. In comparison, Ultrasonic NDT is generally considered safe for human operators and does not require extensive safety precautions aside from standard protective measures.