Unit IIITHERMOGRAPHY AND EDDY CURRENT TESTING (ET)
- 1. KONGUNADU COLLEGE OF ENGINEERING AND TECHNOLOGY (AUTONOMOUS) NAMAKKAL- TRICHY MAIN ROAD, THOTTIAM DEPARTMENT OF MECHANICAL ENGINEERING ME8097 NON DESTRUCTIVE TESTING AND EVALUATION SEVENTH SEMESTER UNIT-III PRESENTED BY M.DINESHKUMAR, ASSISTANT PROFESSOR, DEPARTMENT OF MECHANICAL ENGINEERING, KONGUNADU COLLEGE OF ENGINEERING AND TECHNOLOGY.
- 2. ME8097 NON DESTRUCTIVE TESTING AND EVALUATION OBJECTIVE: To study and understand the various Non Destructive Evaluation and Testing methods, theory and their industrial applications. UNIT I OVERVIEW OF NDT 9 NDT Versus Mechanical testing, Overview of the Non Destructive Testing Methods for the detection of manufacturing defects as well as material characterisation. Relative merits and limitations, Various physical characteristics of materials and their applications in NDT., Visual inspection –Unaided and aided. UNIT II SURFACE NDE METHODS 9 Liquid Penetrant Testing - Principles, types and properties of liquid penetrants, developers, advantages and limitations of various methods, Testing Procedure, Interpretation of results. Magnetic Particle Testing- Theory of magnetism, inspection materials Magnetisation methods, Interpretation and evaluation of test indications, Principles and methods of demagnetization, Residual magnetism. UNIT III THERMOGRAPHY AND EDDY CURRENT TESTING (ET) 9 Thermography- Principles, Contact and non contact inspection methods, Techniques for applying liquid crystals, Advantages and limitation - infrared radiation and infrared detectors, Instrumentations and methods, applications. Eddy Current Testing-Generation of eddy currents, Properties of eddy currents, Eddy current sensing elements, Probes, Instrumentation, Types of arrangement, Applications, advantages, Limitations, Interpretation/Evaluation. UNIT IV ULTRASONIC TESTING (UT) AND ACOUSTIC EMISSION (AE) 9 Ultrasonic Testing-Principle, Transducers, transmission and pulse-echo method, straight beam and angle beam, instrumentation, data representation, A/Scan, B-scan, C-scan. Phased Array Ultrasound, Time of Flight Diffraction. Acoustic Emission Technique – Principle, AE parameters, Applications. UNIT V RADIOGRAPHY (RT) 9 Principle, interaction of X-Ray with matter, imaging, film and film less techniques, types and use of filters and screens, geometric factors, Inverse square, law, characteristics of films -graininess, density, speed, contrast, characteristic curves, Penetrameters, Exposure charts, Radiographic equivalence. Fluoroscopy- Xero-Radiography, Computed Radiography, Computed Tomography. TOTAL : 45 PERIODS
- 3. UNIT III THERMOGRAPHY AND EDDY CURRENT TESTING Thermography- Principles, Contact and non contact inspection methods, Techniques for applying liquid crystals, Advantages and limitation - infrared radiation and infrared detectors, Instrumentations and methods, applications. Eddy Current Testing- Generation of eddy currents, Properties of eddy currents, Eddy current sensing elements, Probes, Instrumentation, Types of arrangement, Applications, advantages, Limitations, Interpretation/Evaluation.
- 4. Thermography Thermography is a non-contact , non- destructive test method that utilizes a thermal image to detect, display & record thermal patterns and temperatures across the surface of an object. Thermography is widely used in industries for predictive maintenance, other Applications include, tank & concrete inspection, NDT, condition monitoring , night vision medical and veterinary sciences.
- 5. Thermography
- 6. What makes thermography so useful?
- 16. Reflection
- 17. Reflection
- 18. Reflection
- 19. Reflection
- 22. Emissivity
- 23. Emissivity
- 24. Emissivity
- 32. Elements of Infrared detection system