MWE105

NON-DESTRUCTIVE TESTING AND FAILURE ANALYSIS

OBJECTIVE : To become familiar with NDT techniques and to get exposed to the concept and procedure associated with failure analysis.

1 LPT, MPT AND RADIOGRAPHY

Visual examination; liquid penetrant testing – procedure; penetrant testing materials, penetrant testing method – sensitivity; application and limitations; magnetic particle testing; definition and principle; magnetizing technique, procedure, equipment sensitivity and limitation; radiography – basic principle, electromagnetic radiation in film, radiographic imaging, inspection techniques, applications, limitations, real time radiography, safety in industrial radiography.

2 EDDY CURRENT AND ULTRASONIC TECHNIQUES

Eddy current testing – principle, instrument techniques, sensitivity application, limitation; ultrasonic testing – basic properties of sound beam, ultrasonic transducers, inspection methods, technique for normal beam inspection, flaw characterization technique, ultrasonic flaw detection equipment modes of display, immersion testing, advantage, limitations; acoustic emission testing – principles of AET and techniques.

3 APPLICATION OF NDT TO FINISHED PRODUCTS

Comparison and selection of NDT methods – defects like casting defects, forging and rolling defect, extrusion defect, drawing defect, grinding cracks, heat treating cracks, service defects; selection of NDT methods- VE, LPT, MPT, ECT, RT, UT, AET and thermography; selection of instrumentation for various NDT methods; reliability in NDT.

4 FAILURE ANALYSIS – I

Failure analysis – methodology; approaches, tools and techniques of failure analysis; modes of failure; failure data retrieval; procedural steps for investigation of a failure for failure analysis.

5 FAILURE ANALYSIS – II

Improvements (design, material) derived from failure analysis; two case studies; application of fracture mechanics concepts to design for safety.

TEXT BOOKS :

  1. Baldev Raj, Jayakumar T., Thavasimuthu M., ‘Practical Non-Destructive Testing’, Narosa Publishing, 1997.
  2. Das A.K., ‘Metallurgy of Failure Analysis’, TMH, 1992.

REFERENCES :

  1. Hull., ‘Non-Destructive Testing’, ELBS Edition, 1991
  2. Halmshaw R., - ‘Non-Destructive Testing’, Edward Arnold, 1989
  3. Rolfe T., Barsom J., ‘Fracture and Fatigue Control and Structure – Application of Fracture Mechanics’, Prentice Hall, 1977
  4. Metals Hand Book (Failure Analysis and Prevention), Volume X, American Society for Metals, 1988
  5. Metals Hand Book (Mechanical Testing), Volume VIII, American Society for Metals, 1988
  6. Suryanarayana., ‘Testing of Metallic Materials’, Prentice Hall India, 1979