Investigation on welding defects of alloys using TIG and MIG welding

Abstract

This study is to look at the welding procedures of tungsten inert gas (TIG) and metal inert gas (MIG). This study focuses on welding flaws with different types of welding joints for AISI-1020 mild steel when welding with tungsten inert gas (TIG) and metal inert gas (MIG). The effects of various process factors on weld mild steel were investigated. The primary process parameters were modified in this research, and the influence on impact strength and hardness was investigated using destructive tests (tensile test). In a tensile test, the yield stress, elastic stress, breaking stress, and breaking force were all measured. Non-destructive (NDT) testing was also carried out. The ultrasonic and liquid penetration tests were carried out without causing any damage. Additionally, non-destructive testing (NDT) was done. The liquid penetration and ultrasonic tests were conducted using non-destructive testing. A comparison of the two testing approaches also brought attention to the need of outstanding weld quality. Fig. 12 shows the stresses in the tensile test for MIG welding, which are 204.793 N/mm2 for yield, 27688 N/mm2 for elastic behavior, and 180 N/mm2 for breaking behavior. The welding link was severed at 180 N/mm2 for MIG welding. The stresses for TIG welding are depicted in Fig. 13 as 313.633 N/mm2 (yield), 16506.2 N/mm2 (elastic), and 257.890 N/mm2 (breaking). The welding connection has failed at 257.890 N/mm2. Before welding, AISI-1020 mild steel had a breaking stress of 420 N/mm2. After welding, the breaking stress was reduced and is now 257.890 N/mm2.