Course Details
Subject {L-T-P / C} : MM5221 : Metallurgical Failure: Detection and Analysis { 3-0-0 / 3}
Subject Nature : Theory
Coordinator : Prof. Krishna Dutta
Syllabus
Fundamentals of fracture mechanics: Griffith’s crack theory, Strain energy release rate, Stress analysis of cracks and linear elastic fracture mechanics (LEFM), Crack tip plastic zone, Plane strain and plane stress fracture toughness, Plane strain fracture toughness determination, Plane stress fracture toughness determination, Fracture toughness determination using J-integral approach.
Non-destructive testing of defects: visual inspection, liquid penetration inspection, magnetic particle inspection, eddy current inspection, ultrasonic testing, radiographic inspection.
Phenomenological description of various modes of failure, fracture, fractography
Different failures: Fatigue failure, creep and stress rupture failures, environment-assisted failures, wear failures, common failures in castings, weldments, gears, shafts and springs, failures of composites
Analyses of engineering failures: Typical defects, macroscopic fracture surface examination, metallographic and fractographic examination, steps in failure analysis, case histories.
Course Objectives
- This course is aimed to discuss about defects in materials, their origin and different methods of defect the defects in engineering materials.
Course Outcomes
1. Development of skills about fracture mechanics <br />2. Development of knowledge-base to understand different engineering failures <br />3. Generation of the skills about different non-destructive test methods and their implementation <br />4. Learning of methods to detect/estimate the cracks/flaws those are present in materials <br />5. Development of knowledge-base to understand the reasons behind various mechanical failures through structure-property correlations. <br />6. Development of understanding about different case studies from recent reports on failure analysis
Essential Reading
- R. W. Hertzberg, Deformation and Fracture Mechanics of Engineering Materials,, John Wiley & Sons Pub. , 4th Ed. (1995).
- A. K. Bhargava and C. P. Sharma, Mechanical Behaviour and Testing of Materials, PHI Learning Private Limited , 1st Ed. (2011)
Supplementary Reading
- David Broek, Elementary Engineering Fracture Mechanics, Sijthoff & Noordhoff
- Baldev Raj, T Jayakumar, M Thavasimuthu, Practical Non-Destructive Testing, Narosa Purlishing House , 3rd Ed.