Herringbone porosity in welding is a type of porosity defect characterized by a pattern resembling the bones of a herringbone. This defect occurs when gas bubbles become trapped within the weld metal during solidification, resulting in a distinctive, branching pattern of pores. Herringbone porosity can weaken the weld joint and compromise its integrity, particularly in applications where weld strength and […]
Tungsten inclusions in welding occur when tungsten particles from the electrode used in gas tungsten arc welding (GTAW) become entrapped in the weld metal. These inclusions can compromise the integrity of the weld by reducing its mechanical properties and causing stress concentration points. Tungsten inclusions are particularly problematic in critical applications where high weld quality and integrity are essential. Example: […]
Transverse cracks in welding are defects characterized by cracks that propagate perpendicular to the direction of the weld joint. These cracks can occur due to various factors such as high welding stresses, improper welding parameters, hydrogen embrittlement, or inadequate material selection. Transverse cracks can compromise the integrity and strength of the weld joint, leading to catastrophic failure if not addressed. […]
Interpass slag inclusions in welding occur when slag from a previous welding pass becomes trapped between subsequent weld passes, leading to discontinuities within the weld joint. Slag inclusions can weaken the weld and compromise its integrity. They can also serve as initiation points for other defects such as cracks or porosity. Example: Welding of a Steel Structure Let’s consider the […]
Cracks in welding are one of the most severe and critical defects that can occur, significantly compromising the integrity and strength of the welded joint. Cracks can form during or after welding due to various factors such as welding stresses, improper joint preparation, inadequate welding parameters, or material properties. These cracks can propagate through the weld metal, base metal, or […]
Parallel slag lines in welding refer to the presence of multiple parallel lines or bands of slag trapped within the weld bead. Slag is a byproduct of the flux or shielding gas used during welding, and its presence within the weld can compromise the structural integrity and mechanical properties of the joint. Parallel slag lines are indicative of incomplete slag […]
Incomplete filled groove weld is a weld defect characterized by the failure to completely fill the groove between the base metals during the welding process. This defect typically occurs due to inadequate weld deposition, insufficient penetration, or improper welding technique, resulting in a weld bead that does not fully bond with the base metal surfaces. Incomplete filled groove welds can […]
Gas pores, also known as gas pockets or voids, are common weld defects caused by the entrapment of gas, typically hydrogen or nitrogen, within the weld metal during solidification. Gas pores appear as spherical or elongated voids within the weld bead and can significantly compromise the mechanical properties and structural integrity of the weld joint. These defects may lead to […]
Spatter or debris in welding refers to the expulsion of molten metal particles and other contaminants from the weld pool during the welding process. Spatter can adhere to the surface of the weld, adjacent areas, or surrounding equipment, leading to surface irregularities, roughness, and contamination. While spatter may not always directly affect the integrity of the weld joint, excessive spatter […]
Arc strike is a weld defect that occurs when an electric arc unintentionally strikes the surface of the base metal or nearby areas during welding operations. This phenomenon can lead to localized heating, melting, and surface damage, resulting in the formation of irregularities, such as cracks, pits, or surface contamination. While arc strikes may not always directly affect the integrity […]