Influence of electromagnetic vibration on microstructures and mechanical properties of 304 stainless steels on Gas Tungsten Arc Welding Process

This research aimed to study the influence of electromagnetic vibration during the welding of the
stainless-steel grade 304 with cover Gas Tungsten Arc Welding process affecting microstructure and
mechanical properties. Electromagnetic vibrations were 0, 20, and 40 Hzhertz, welding current, and welding
speed. After welding, the microstructure was analyzed by the optical microscope (OM) and measured the
hardness of the weld area. The results found that the electromagnetic vibration at 40 hertz was the highest
hardness in the austenite structure and delta ferrite. The welding current was 120 amperes. The welding
speed was 300 millimetres per minute. The hardness measured was at 271.21 HV. The lowest hardness value when electromagnetic vibrations at 0 hertz, The welding current was 100 amperes. The welding speed
was 200 millimetres per minute. The hardness was measured at 216.32 HV.