Effect of Hydrogen in an Argon GTAW Shielding Gas: Arc Characteristics and BeadMorphology

摘要

The influence of hydrogen additions to an argon shielding gas on the heat inputand weld bead morphology was investigated using the gas tungsten arc welding process. Variations in weld bead size and shape with hydrogen additions were related to changes in the ability of the arc to generate heat and not to generate perturbations in the weld pool caused by Marangoni fluid flow.