Investigation on Mechanical and Metallurgical Characterization of Micro-Alloyed Steel Produced by Friction Stir Welding (FSW)

<div class="section abstract"><div class="htmlview paragraph">This research investigates the impact of friction stir welding (FSW) used to join micro-alloyed steel, on the material and its mechanical characteristics. FSW increases the metallurgical and mechanical qualities of joints made from micro-alloyed steel. However, Friction Stir Welding has produced only modest improvements in connecting steels. Automobile chassis, offshore platforms, oil and gas pipelines, mining, shipbuilding and railroad carriages, pressure vessels, bridges, and storage tanks are just some of the many places and find micro-alloyed steels employed. Frictional heat and tool movement over the joint cause micro defects occurred. Tungsten carbide tools are used in this investigation. Welding shares the same process characteristics, such as the tool's rotating speed (900 rpm) and axial force (10 kN). The table's traverse speed options are available, including 50 mm/min, 60 mm/min, and 70 mm/min. Vickers microhardness testing machines and tensile testing machines are used to perform mechanical characterizations such as hardness testing and tensile testing, respectively. Charpy testing was used to analyze the impact energy released during the fracture of the welded joint. The Scanning Electron Microscope (SEM) and Optical Microscope are used for metallurgical characterizations such as microstructure and tensile fracture research. DMR-249A is low-carbon micro-alloyed steel, and it is a far better grade than the multiple grades that have previously been used for naval and other industrial uses like shipbuilding, railway car construction, etc.</div></div>