An Experimental Study on the Effect of Heat Input on the Weld Efficiency of TIG-MIG Hybrid welding of Type 304 Austenitic Stainless Steel

Abstract

Abstract Welding is described as the process of joining metals so that bonding can be created as a result of inter-atomic penetration. This study investigated the impact of heat input on the efficiency of the welding joints of 304 stainless steel. Three welds joint were made from two similar 304 stainless steel plates of thickness 6 mm. The tensile strength outcomes acquired showed that apex average magnitude of 672 MPa is obsessed by the sample A1 with lower thermal input. It was discovered that the percentage elongation, tensile strength and weld joint efficiency decreased with the intensification in thermal input into the weld. The average % elongation for the entire samples ranged from 28.4 % to 36.5 %. Sample A1 had the highest joint efficiency of 94.5 %. However, the optimum welding current of 190 for TIG and MIG hybrid welding of type-304 austenite stainless steel can be recommended for advanced technological applications such as aircraft manufacturing, nuclear industry, automobile industry and processing industry.