Applied Welding Metallurgy

This course provides a practical understanding of the metallurgical principles associated with welding processes and welded structures. It explains how welding heat input, thermal cycles, and cooling rates influence the mechanical properties and microstructure of welded materials. Participants will learn about weld metal, heat-affected zones (HAZ), and the metallurgical transformations that occur during welding. The course covers the weldability characteristics of carbon steels, stainless steels, alloy steels, and other commonly used engineering materials. It introduces common welding defects and explains their metallurgical causes, effects, and prevention methods. Participants will understand the importance of preheating, interpass temperature control, and post-weld heat treatment (PWHT) in achieving reliable welded joints. The course also examines hardness, toughness, residual stresses, and welding distortion and their relationship with welding parameters and material behavior. It explains the selection of suitable welding consumables based on material composition, welding procedure, and service conditions. Participants will learn about metallurgical testing, weld inspection, and failure analysis techniques used to evaluate welded components. The course connects welding metallurgy concepts with practical applications in fabrication, maintenance, quality control, inspection, and engineering projects.