A discontinuity in the weld bead can arise from inadequate reheating or insufficient filler metal at the point of resumption. This imperfection may manifest as incomplete fusion, slag inclusions, porosity, or undercut, potentially weakening the joint and making it susceptible to premature failure under stress. For instance, a weld restart performed at too low a temperature might trap gas, creating voids that compromise structural integrity.
Sound weld restarts are critical for achieving strong, reliable, and durable welded structures. Ensuring continuity and quality at these points minimizes potential failure points and extends the lifespan of fabricated components. Historically, the understanding and techniques for proper weld restarts have evolved alongside advancements in welding processes and materials science. This evolution has led to improved procedures and a heightened awareness of the crucial role restarts play in overall weld quality.
