B.Tech III Year II Semester (R16)
The basic objective of this course is to provide in depth knowledge about
various metal joining techniques, the thermal, residual, and transformational stresses associated with, the equipment used, their modern developments, and defects and defectoscopy of weldments.
The student will be able to apply various metal joining techniques for
various ferrous and nonferrous alloys, fixing of process parameters to obtain a sound welding, precautionary measures to be taken to avoid weld defects, and advancements in Metal Joining technologies.
Classification of welding processes. Principles, advantages disadvantages and fields of application of the following welding processes: Gas Welding, Arc Welding processes, MMAW, GTAW, GMAW, SAW, ESW & EGW, Resistance Welding. Other metal joining techniques: Brazing, Soldering and Adhesive bonding.
Working principle. Advantages and limitations of solid state welding processes. Friction, friction stir, explosive, diffusion and ultrasonic welding Advanced Metal Joining Techniques: Plasma Arc Welding, Electron Beam Welding, Laser welding.
Weldability, Microstructure of fusion zone and heat affected zone. Influence of heat input, thermal and residual stresses, pre heat and cooling rate, PWHT. Weldability of high carbon steel, cast irons, stainless steels use of Schaffler and Delong diagrams.Welding of non-ferrous alloys - Aluminum alloys and Cu-base alloys.
Welding of dissimilar metals, Joining of ceramics with case studies.
Quality Testing of Weldments by Dye Penetrant and Radiography Testing, Defects in weldments, causes, effects and remedies, hot and cold cracking.
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