Non-destructive testing and evaluation of cast materials

In the industrial age of today. non-destructive evaluation of materials, components. and assemblies has become increasing) important. and plays a crucial role, be it in space. power, oil, automobile, or steel sector. As the consequences of component failure are more serious than ever, the integrity of component has to be evaluated and assessed at even* stage of its production. Presence of harmful defects, tensile residual stress, and unwanted microstructure affects the integrity of any component. Hence, assessment of defects, and evaluation of residual stress and microstructure are very essential. Man' nondestructive testing and evaluation techniques are being used for detection and characterization of defects, evaluation of residual stress, and assessment of microstructure. The' provide it tool by which integrity evaluation, and assurance activities for components can he carried out. In this paper, an attempt has been made to present the basic concepts of non¬destructive evaluation. The principles of different non-destructive test techniques have been discussed, and the application of these techniques for evaluation of castings has been highlighted.