Experimental Investigation of Microstructure and Mechanical Properties of Brass–Iron Joined by TIG Welding Process

Brass is widely used as engineering material in marine and process industry in light of its high quality, corrosion resistance, electrical, and high warm conductivity. It is easily shaped and possesses a gratifying appearance. Notwithstanding, it is hard to weld brass. The principal issue with brass alloy while welding is dissipation of zinc. Subsequent to welding, the weld area and warmth influenced zone end up permeable, since the measure of zinc in the metal combination is diminished because of vanishing, and it loses the physical and compound properties which it typically has. In this paper, a brass–iron, which is widely used in marine and process industries, is taken and welding is done with Tungsten Inert Gas (TIG) welding process with different parameters such as root gap, flow rate, diameter of electrode, and flow of current. The principal target of this paper was to determine mechanical properties, such as tensile strength, hardness, and microstructure of TIG welded brass joints. Weld zone and heat-affected zones of brass welded test are seen by scanning electron microscopy (SEM) to decide zinc dissipation in 2D pictures. Tensile strength and hardness tests are performed by utilizing universal testing machine (UTM) and Vickers hardness testing machine separately according to ASTM principles. Tensile strength of brass weld tests was found in the range of 27.102–263.62 N/mm², level of elongation was found in the range 0.72–3.80% and hardness of brass weld test was found in the range 85.9–160.33 HV. How evaporation of zinc is decreased in metal weld test is seen at weld zone (WZ), heat-affected zone 1 (HAZ1), and heat-affected zone 2 (HAZ2).