What is a "weld bead" in the context of GTAW?

A weld bead refers to the deposit created during the welding process when molten filler material solidifies to form a joint between two pieces of metal. In Gas Tungsten Arc Welding (GTAW), the welder uses a non-consumable tungsten electrode to create an arc, which melts the base metal and the filler rod, if used. As the molten material cools, it solidifies to form a continuous weld bead that can vary in appearance and characteristics based on various factors such as heat input, travel speed, and filler material. The quality and integrity of the weld bead are crucial for ensuring a strong, reliable connection in the completed workpiece.

The other options do not accurately describe the term "weld bead." A welding tool itself is not a weld bead but an instrument used during the welding process. Temperature refers to the heat involved in welding, while a measurement of skill does not pertain to the physical output of the welding process itself. Understanding the definition and significance of a weld bead is essential for evaluating and improving welding quality in GTAW.