Weld Defect
Weld defects are deviations from the specified geometric and metallurgical properties in welded joints, such as cracks, porosity, or lack of fusion. These reduce load-bearing capacity and often require rework.
Physikalisch-chemischer Wirkmechanismus
Weld defects are caused by improper welding processes, lack of control, or material defects. Porosity can form during solidification and remain in the metal, weakening it. Cracks can occur due to rapid cooling or mechanical stress.
Metallurgical Relevance & Welding Risks
Weld defects reduce the load-bearing capacity and toughness of the weld, increase the risk of cracking, and can lead to failure. They also cause extra costs due to rework and can jeopardize safety.
Werkstattpraxis & Handlungsanweisungen
To avoid weld defects, careful preparation of the workpiece is essential. Make sure all surfaces are clean and free of contaminants. Use suitable shielding gases or backing materials to prevent porosity. Pay attention to proper heating and cooling of the metal to avoid cracks. If necessary, do rework such as grinding or filling pores.