Nodal crack

Physical-Chemical Mechanism

Nodular cracks form when multiple welds converge at a point and stress each other. The combined constraint forces can overstress the metal, leading to cracking.

Metallurgical Relevance & Welding Risks

Nodular cracks can cause severe stress concentrations and structural failure. They induce mechanical interactions that damage the material and reduce component life.

Workshop Practice & Procedures

Avoid nodule formation by carefully planning the welding sequence. Use adequate filler material and ensure uniform stress distribution. If a nodular crack is detected, repair immediately to prevent further damage.