Local joint misalignment
A local misalignment is a sudden, axial or lateral deviation of the joint partners within a weld. It can lead to stress and cracks.
Physical-chemical mechanism of action
A local misalignment occurs due to unequal expansion or deformation of the workpieces during welding. This can be caused by different materials, stresses in the workpiece, or inaccurate alignment of the parts.
Metallurgical relevance & risks in welding
Local misalignment creates stress concentrations within the weld, which can lead to cracks and wear. It can also affect the strength and toughness of the weld, which is especially dangerous in high-stress applications.
Shop practice & instructions
To avoid local misalignment, careful alignment of the parts is essential. Make sure the workpieces are straight and secure before welding. Use aids like expansion slides or clamps if necessary to distribute the expansion evenly. After welding, inspect the weld for cracks and wear with a microscope or an ultrasonic scanner.