What method is used to prevent the spread of cracks in welded components?

Drilling welding stop holes is an effective method used to prevent the spread of cracks in welded components. When a crack begins to initiate, it usually does so from a point of high stress or a critical flaw in the material. By drilling a stop hole at the end of the crack, you create a boundary that effectively relieves the stress concentration at that point. This interrupts the natural propagation path of the crack, allowing it to "stop" at the hole rather than continuing to extend, which helps to maintain the integrity of the welded structure.

This technique is particularly important in applications where the structural integrity is crucial, as it not only serves to inhibit further damage but also allows for inspection and repair of the affected area. Overall, this method is widely recognized in welding practices for enhancing the durability of welded joints.