Optical microscopy

1. M.KARTHIKEYAN
ASSISTANT PROFESSOR
DEPARTMENT OF MECHANICAL ENGINEERING
AAA COLLEGE OF ENGINEERING & TECHNOLOGY, SIVAKASI
karthikeyan@aaacet.ac.in
OML751 TESTING OF MATERIALS

2. UNIT IV MATERIAL CHARACTERIZATION TESTING
1. Macroscopic observations
2. Microscopic observations
3. Optical microscopy
4. Electron microscopy (SEM)
5. Electron microscopy (TEM)
6. Diffraction techniques,
7. Spectroscopic Techniques,
8. Electrical Techniques
9. Magnetic Techniques
Principles, Types, Advantages and Limitations, Applications.

3. 1. SPECIMEN CUTTING

4. 2. ULTRASONICATION CLEANING

5. 3. DRYING

6. 4. PREPARATION OF MOUNT

7. 5. CURING/DRYING

9. 6. ROUGH POLISHING [COARSE EMERY SHEET]

10. 7. FINE POLISHING [FINE EMERY SHEET]

11. 7. FINE POLISHING [FINE EMERY SHEET]

12. 8. ULTRASONICATION CLEANING

13. 9. RINSED WITH WATER

14. 10. MIRROR POLISHING USING DIAMOND PASTE

15. 10. MIRROR POLISHING USING DIAMOND PASTE

16. 9. RINSED WITH WATER

17. 10. MIRROR POLISHING

18. 11. EXAMINATION

19. 12. MICROSTRUCTURE OBSERVATION

20. 13. MICROSTRUCTURE OBSERVATION

21. • Removal of hard sample material is done by _________
a) Manual hacksawing
b) Piercing
c) Abrasive cutoff wheel
d) Oxy-fuel burning
MCQ - 1

22. 7
The study of metallographic includes ____
a. alloy constituents
b. failure analysis
c. metal structure
d. all of the above
MCQ - 2

23. • Which thermosetting resin is used in the mounting of the
specimen in metallography?
a) Thiolyte
b) Bakelite
c) Silicone
d) Urea formaldehyde
MCQ - 3

24. • Which thermoplastic resin is used for mounting a
specimen in metallography?
a) Lucite
b) Polycarbonate
c) Polystyrene
d) Acetal copolymer polyoxymethylene
MCQ - 4