ME 512 Welding and Additive Manufacturing (3-0-0-6)
Introduction to welding processes; Classification of joining processes; Type of welds and weld joints; Welding symbols and codes; Arc welding processes; Laser welding; Electron beam welding; Resistance spot welding; Friction welding; friction stir welding; Types of power sources, Current-voltage and arc power – arc length characteristics; Synergic and pulsed welding; Forces on molten droplet, Mode of metal transfer in arc welding; Cold metal transfer. Analysis of heat flow, Cooling rates; Models for welding heat sources, Analytical solution of temperature distribution; Chemical reactions in welding; Solidification in welding and solidification cracking; Phase transformation in welded structure; Weld microstructure; Heat treatment of weld joint; Types of welding defects, their cause and remedies; Distortion and residual stress and their measurement; Weld testing methods: destructive and non-destructive; Analysis of welded structure for fatigue loading; Additive manufacturing: Introduction; Classification; Principle, Welding technology based metal 3D printing; Solid state additive manufacturing, Additive vs. subtractive manufacturing.
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