Transverse Weld Crack
A weld seam transverse crack is a crack that goes across the welding direction and comes from high axial shrinkage stresses and brittle microstructure. It can cut through the weld metal perpendicular to the main stress direction.
Physical-Chemical Mechanism of Action
A transverse weld crack forms when high axial shrinkage stresses combine with a brittle microstructure. During cooling, the metals contract and can suddenly crack if stress levels are too high.
Metallurgical Relevance & Welding Risks
A transverse crack can seriously affect the weld metal by cutting it perpendicular to the main stress direction. This leads to reduced load-bearing capacity and increases the risk of further cracks or failure under load.
Workshop Practice & Action Guidelines
To avoid transverse cracks, ensure careful thermal insulation during welding. Cooling should be slow and controlled to avoid high stresses. For highly brittle microstructures, consider using zinc or other stabilizing additives.