Syllabus
Fusion welding processes: GTAW-concepts, physics of arc, flux assisted processes, forces, pulsed and continuous current modes, GMAW-concepts, types of metal transfer, pulsed and synergic MIG welding, shielding gases in arc welding processes, Selection of filler wire in welding, EBW: Concepts, types and applications. LBW: Physics of lasers, types of lasers, operation of laser welding setup, advantages and limitations, applications, hybrid welding. Solid state welding processes: Friction welding: Concepts, types and applications. Friction stir welding: Metal flow phenomena, tools, process variables and applications, Explosive bonding, diffusion bonding and ultrasonic welding, principles of operation, process characteristics and applications- Brazing and soldering- Welding residual stresses - causes, occurrence, effects, and measurements - types of distortion - factors affecting distortion - distortion control methods - prediction – Defects: Origin - types - process induced defects, - significance - remedial measures, Welding and welding metallurgy of aerospace materials.
Text Books
- J Norrish, Advanced welding process, woodhead publishing (2006)
- Nadkarni S.V., Modern Arc Welding Technology, Oxford IBH Publishers (1996)
References
1. Cary, Howard, Modern Welding Technology, prentice Hall (1993)
2. Kenneth Easterling, ‘Introduction to Physical Metallurgy of Welding’, Elsevier (1992)
3. Mishra. R.S and Mahoney. M.W, Friction Stir Welding and Processing, ASM
4. Christopher Davis, ‘Laser Welding - A Practical Guide’, Jaico Publishing House (1994)
5. H. Schultz, Electron Beam Welding, Woodhead Publishing Series in Welding and Other Joining Technologies (1994)
6. Larry Jeffus, welding: principles and applications, 8th ed. Cengage learning (2016).
7. AWS handbook
Course Outcomes (COs):
CO1: Understand the basic concepts of various welding processes, including fusion welding and solid-state welding process
CO2: To analyse the various defects associated with welding processes and correlate with the process parameters
CO3: To decide on the type of metal transfer required for various applications
CO4: Understand the effect of process parameters in various welding processes on the quality and performance of weld joints
CO5: Gain knowledge on weld residual stresses, distortion, welding process defects, their causes, and remedies
CO6: To select the right choice of filler materials.