Microstructure Analysis Of Heat Affected Zone During MIG Welding Using Mild Steel

Authors: Md Zaid Javed, Er. Shara Khursheed, Dr. Mohd Faizan Hasa

Abstract: Metal Inert Gas (MIG) welding is extensively employed for joining mild steel due to its efficiency and adaptability. However, the thermal cycles inherent in the welding process induce significant microstructural transformations, particularly within the Heat Affected Zone (HAZ), which can influence the mechanical properties of the welded joint. This study delves into the microstructural variations within the HAZ of MIG-welded mild steel, examining how different welding parameters affect grain morphology and phase distribution. Through metallographic analysis, the research identifies distinct sub-zones within the HAZ and correlates these findings with mechanical property alterations, offering insights for optimizing welding practices.