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Coarse grained structures of casting material lead to increase attenuation in ultrasonic inspection.

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in Casting-Forming-Welding I by (687k points)
Coarse grained structures of casting material lead to increase attenuation in ultrasonic inspection.

(a) True

(b) False

This question was posed to me in examination.

Enquiry is from Inspection Procedures in division Inspection Testing in Foundries of Casting-Forming-Welding I

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Correct option is (a) True

To elaborate: Coarse grained structures in thick plates, ingots and cast materials cause considerable increase in attenuation, that shows more loss of energy during an inspection of the castings. It mainly occurs due to scattering and diffraction at grain boundaries of the casting material. This is known as ultrasound attenuation.

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