To study the principles of welding metallurgy of ferrous and non-ferrous materials .
1 THERMAL CYCLES
Heat flow - temperature distribution-cooling rates - influence of heat input, joint geometry, plate thickness, preheat, significance of thermal severity number.
Epitaxial growth - weld metal solidification - columnar structures and growth morphology- effect of welding parameters - absorption of gases - gas/metal and slag/metal reactions.
3 WELDING METALLURGY OF FERROUS MATERIALS
Phase transformations- weld CCT diagrams - carbon equivalent-preheating and post heating- weldability of low alloy steels, welding monograms; welding of stainless steels (austenitic, ferritic, martensity, duplex and PH stainless steels), use of Schaffler and Delong diagrams, welding of cast irons – microstructures, defects and remedial measures.
4 WELDING METALLURGY NON FERROUS MATERIALS
Welding of Cu, Al, Ti and Ni alloys – processes, difficulties, microstructures, defects and remedial measures.
5 WELD DEFECTS AND WELDABILITY TESTS
Origin - types - process induced defects, - significance - remedial measures, Hot cracking - cold cracking -lamellar tearing - reheat cracking - weldability tests - effect of metallurgical parameters.
TEXT BOOKS :
- Linnert G. E.,‘Welding Metallurgy’, Volume I and II, 4th Edition, AWS, 1994
- Granjon H., ‘Fundamentals of Welding Metallurgy’, Jaico Publishing House, 1994
- Kenneth Easterling, ‘Introduction to Physical Metallurgy of Welding’, 2nd Edition, Butterworth Heinmann, 1992
- Saferian D., ‘The Metallurgy of Welding’, Chapman and Hall, 1985
- Jackson M. D., ‘Welding Methods and Metallurgy’, Grffin, London, 1967
- Norman Bailey, ‘Weldability of Ferritic Steels’, Jaico Publishing House, 1997
- Kou S., ‘Welding Metallurgy’, John Wiley, 1987