Non-Destructive Ultrasonic Testing: A Step Towards Highly Reliable Fault Detection

1517 WordsJan 31, 20186 Pages
Accepted In Conventional ultrasonic non-destructive condition monitoring the testing personnel use his testing experience to interpret defects by analysing the ultrasonic echo. Owing to the coarse material structure, the ultrasonic waves attenuate more and sometimes it gives a false impression of defect and provides unreliable results. The conventional inspection method is too subjective and highly relies on the effectiveness of testing personnel owing to the fact inspection reliability is low. To overcome these limitations a multi-interrogation ultrasonic technique and correlation of several parameters such as attenuation, acoustic velocity and grain size with material features is suggested in this paper. Keywords: Non-Destructive Testing; Ultrasonic Testing; Grain Size 1 Introduction Non Destructive Testing (NDT) is the testing of materials, for surface or internal flaws or metallurgical condition, without rendering it unfit for service. There are various NDT methods of inspecting the internal defects of complex surface parts, e.g. radiography, eddy flow, ultrasonic, etc. Amongst these testing techniques, ultrasonic testing has an important role due to strong penetration, good direction, high sensitivity, overall comparative low cost, and being harmless to the human body and the material of the parts. Ultrasonic [1, 2, 3, 4] is a highly effective non destructive condition monitoring method that helps in detecting even incipient faults particularly Mean

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