Design of experiments 1 Electrode diameters 1 Flow of gases 1 Gas flowrate Gas welding 1 Hardness 1 Inert gas welding 1 Inert gases 1 Input parameter 1 Martensitic stainless steel 1 Martensitic structures 1 Novel SEM microstructure 1 Parameter impacts 1 Plates (structural components) 1 Tensile strength 1 Tensile test 1 Tensile testing 1 Tungsten 1 Tungsten inert gas welding 1 Welding current 1 Welds 1 Wire feed rate 1 hardness 1 martensitic steel 1 novel SEM microstructures 1 tensile test 1 tungsten inert gas welding 1