Influence of electromagnetic vibrations on the microstructure and mechanical properties of 316 stainless steel on Gas Tungsten Arc Welding process

This research aimed to study the influence of electromagnetic vibrations on the microstructure and
mechanical properties with Gas Tungsten Arc Welding process of 316 stainless steels. Study and design an
experiment based on three factors: 1. Electromagnetic pulses 2. Welding current 3. Welding speed. The
microstructure analysis experiments with an optical microscope and tests the hardness in the Heat-Affected
Zone (HAZ). Analysis revealed that influence of electromagnetic vibrations affect the austenite and delta
ferrite structures, and the hardness influence is the highest. The hardness results are according to the experimental statistical analysis and data distribution. The highest hardness when electromagnetic
vibrations at 40 Hz, Welding current 105 A, Welding speed 200 mm./min is 269.34 HV, and the lowest
hardness at the level of the factor electromagnetic vibrations at 0 Hz, Welding current 95 A, Welding speed
100 mm./min is 215.18 HV. Statistical significance at the 0.05 level showed that the hardness was a normal
distribution.