Effect of nickel and nitrogen addition on the microstructure and mechanical properties of power beam processed duplex stainless steel (UNS 31803) weld metals

The joining of duplex stainless steel was attempted by electron beam and laser beam welding, introducing nickel and nitrogen into the weld metals by different means. The addition of nickel and nitrogen has a significant role on the microstructure, phase balance and impact toughness, but it seems to have no appreciable influence on hardness.