MT466

Welding Metallurgy

 

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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

 

Phase transformations- weld CCT diagrams - carbon equivalent-preheating and post heating- weldability of low alloy steels, welding of stainless steels use of Schaffler and Delong diagrams, welding of cast irons

 

Welding of Cu, Al, Ti and Ni alloys – processes, difficulties, microstructures, defects and remedial measures

 

Origin - types  - process induced defects, - significance - remedial measures, Hot cracking  - cold  cracking -lamellar  tearing - reheat cracking - weldability  tests -  effect   of   metallurgical parameters,                       

 

TEXT BOOKS

1.       Linnert  G. E.,‘Welding  Metallurgy’, Volume I and II, 4th  Edition, AWS, 1994

2.       Granjon H., ‘Fundamentals of Welding Metallurgy’, Jaico Publishing House, 1994

 

REFERENCES

 

1.             Kenneth Easterling, ‘Introduction to Physical Metallurgy of  Welding’, 2nd Edition, Butterworth  Heinmann, 1992

2.             Saferian D., ‘The Metallurgy of Welding’,  Chapman and  Hall, 1985

1.               Jackson M. D., ‘Welding Methods and Metallurgy’, Grffin, London, 1967SPECIAL