Upon the successful completion of the course, the students would have acquired the following skills:
- To comprehend the non-destructive testing basic principles and categorization of the basic flaws due to fabrication, processing, and use of specific apparatuses.
- To assimilate the concepts of microwave aquametry as a non-destructive technique for the evaluation of moisture in specific structures and analyze the dielectric properties of various media.
- To design, parametrically analyze, develop, fabricate and measure a prototype measurement system, as part of a laboratory project. Specifically, they will be able to perform the required theoretical analysis of the involved electromagnetic phenomena, to construct the prototype by means of specialized laboratory procedures, to simulate the prototype through several computational methods, and obtain sample measure for a variety of real-world scenarios.
- To familiarize themselves with advanced laboratory facilities and equipment and the development of certain numerical techniques for the simulation of the designed prototypes.
Course Content (Syllabus)
Introduction: Principal definitions, general features, examples, techniques, significant evolution milestones, categorization of destructive and non-destructive techniques, personnel certificates, instructions for testing, discontinuities, contribution of numerical techniques.
Radiography: Radiation, Χ and gamma rays, measurement devices, Pb screens, factors and issues for correct measurements, simple and double exposure methods, examples.
Magnetic particles: Categorization of metals, ferromagnetic media, main principles, hysteresis loop,
application samples, discontinuities, measurement procedures.
Eddy currents: Key principles, eddy current attributes, main stages of the method, impedance diagrams, elevation factor, equipment and measurement devices (probes, inductances, yoke), applications.
Ultrasounds: Elastic waves (sheer waves, transverse waves, Rayleigh waves), reflection and transmission coefficients, piezoelectric phenomenon, transducers, measurement and devices, techniques of digital processing.
Optical/Visual testing and penetration fluids: Size measurements, high resolution cameras, description of a basic penetration fluid unit, sample preparation, measurement flow chart.
Microwave aquametry: Dielectric properties of water, measurements of moisture, theory dielectric mixing, material characterization via microwave resonators, microwave sensors for the automatic control of production processes, dielectric spectroscopy, insulating plates.
Material characterization: Direct and indirect assessment, measurement systems, material characterization via microwave resonators, microwave sensors for automated testing of production processes, applications.
Additional bibliography for study
C. J. Hellier, Handbook of Nondestructive Evaluation, McGraw-Hill, 2003.
P. E. Mix, Introduction to Nondestructive Testing, 2nd edition, Wiley-Interscience, 2005.
L. F. Chen, C. K. Ong, C. P. Neo, V. V. Varadan, and V .K. Varadan, Microwave Electronics: Measurement and Materials Characterization, John Wiley & Sons, 2004.
R. Zoughi, Microwave Non-Destructive Testing and Evaluation, Kluwer, 2000.
A. Kraszewski, Microwave Aquametry, IEEE Press, 1996.