NON-DESTRUCTIVE TESTINGAND EVALUATION (18ME823)

NON-DESTRUCTIVE TESTINGAND EVALUATION

Course Code 18ME823 
CIE Marks 40
Teaching Hours /Week (L:T:P) 3:0:0 
SEE Marks 60
Credits 03 
Exam Hours 03

Course Learning Objectives:

• To introduce the basic principles, techniques, equipment, applications and limitations of Non- Destructive Testing (NDT) methods such as Visual, Penetrant Testing, Magnetic Particle Testing, Ultrasonic Testing, Radiography, Eddy Current.
• To enable selection of appropriate NDT methods.
• To identify advantages and limitations of NDT methods
• To make aware the developments and future trends in NDT.

Module-1

OVERVIEW OF NDT: 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.

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Module-2

SURFACE NDT METHODS: 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, magnetization methods, Interpretation and evaluation of test indications, Principles and methods of demagnetization, Residual magnetism.

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Module-3

THERMOGRAPHY AND EDDY CURRENT TESTING (ET): 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.

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Module-4

ULTRASONIC TESTING (UT) AND ACOUSTIC EMISSION (AE): 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.

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Module-5

RADIOGRAPHY (RT): 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.

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Course Outcomes: At the end of the course the student will be able to:

CO1: Classify various 144on-destructive testing methods.
CO2: Check different metals and alloys by visual inspection method.
CO3: Explain and perform non-destructive tests like: Liquid penetrant test, Magnetic particle test, Ultrasonic test, X- ray and Gamma ray radiography, Leak Test, Eddy current test.
CO4: Identify defects using relevant NDT methods.
CO5: Differentiate various defect types and select the appropriate NDT methods for betterevaluation.
CO6: Document the testing and evaluation of the results.

Question paper pattern:

• The question paper will have ten full questions carrying equal marks.
• Each full question will be for 20 marks.
• There will be two full questions (with a maximum of four sub- questions) from each module.
• Each full question will have sub- question covering all the topics under a module.
• The students will have to answer five full questions, selecting one full question from each module.

Textbook:

1 Practical Non-Destructive Testing Baldev Raj, T.Jayakumar, M.Thavasimuthu Narosa Publishing House 2009
2 Non-Destructive Testing Techniques Ravi Prakash New Age International Publishers 1st revised edition2010

Reference Books 

1 ASM Metals Handbook,”Non- Destructive Evaluation and Quality Control”, Volume-17 American Society of Metals, Metals Park, Ohio, USA, 2000
2 Introduction to Nondestructive testing: a training guide Paul E Mix, Wiley 2nd Edition New Jersey, 2005
3 Handbook of Nondestructive evaluation Charles, J. Hellier McGraw Hill, New York 2001 ASNT, American Society for Non Destructive Testing, Columbus, Ohio, NDT Handbook,Vol. 1, Leak Testing, Vol.
2, Liquid Penetrant Testing, Vol. 3, Infrared and Thermal Testing Vol. 4, Radiographic Testing, Vol. 5, Electromagnetic Testing, Vol. 6, Acoustic Emission Testing, Vol. 7, Ultrasonic Testing.