Purpose and limitations of NOT. Selection of NOT methods. Short general survey about NOT methods Liquid penetrant and magnetic particle testing (surface NOT) X-ray and gamma ray inspection: nature of X-rays
and gamma rays; properties of X-ray and gamma rays, origin of gamma rays, radionucleids, interactions of X-ray and gamma rays with matter; image formation and recording, film radiography and fluoroscopy, interpretation of
results, image quality, radiation protection. Ultrasonic testing: nature of US waves, definitions: amplitude, acoustic impedance, intensity, wave types in different media, properties of US waves, reflection and transmission of US waves at boundaries at normal incidence and oblique incidence, consequences of reflection and refraction, attenuation: choice of probe and equipment. Sound field of probe and reflector, near and far field,
directional characteristics. Calibration and testing methods, variables affecting test results. Acoustic emission: sources and types of emission, monitoring equipment, transducers, metallurgical factors affecting acoustic emission Reliability of NOT methods Other methods:
eddy current testing; thermal imaging method. comparison of NOT methods and selection of NOT method(s). Fracture mechanics and NOT: Life extension.
- Teacher: rbauri Ranjit Bauri