In GTAW, what type of penetration and weld width can be expected when using DCEP?

In Gas Tungsten Arc Welding (GTAW), using Direct Current Electrode Positive (DCEP) significantly affects the characteristics of penetration and weld width. DCEP is known for promoting deeper penetration into the base material compared to other current configurations, such as Direct Current Electrode Negative (DCEN).

When employing DCEP, the electrons from the electrode are attracted to the workpiece, resulting in a concentrated heat at the weld area. This intense heat allows for deeper penetration into the material, creating a narrower weld bead as the molten pool is focused and concentrated. The process also helps to improve the fusion of materials being welded, ensuring a strong joint.

The choice that states shallow penetration and wide weld does not align with the established behavior of DCEP in GTAW. The technique is utilized precisely for its ability to create deep penetration and a narrow weld profile, making it particularly effective for welding thicker materials or achieving tighter weld seams. Other configurations, like using AC or DCEN, would yield different penetration characteristics and bead widths, reflecting varying applications within welding practices.