Ductile Fracture Dimple Morphology
Ductile fracture dimple structure is a microscopic honeycomb structure on the fracture surface, formed by micropores. These pores cause ductile tearing.
Physical-Chemical Mechanism of Action
The ductile fracture dimple structure forms through the local formation and coalescence of micropores during plastic deformation. These pores can arise from mechanical loads or chemical reactions.
Metallurgical Relevance & Welding Risks
The ductile fracture dimple structure leads to increased brittleness and can cause cracks in the weld. It is especially dangerous in stiff steels or under high mechanical loads.
Workshop Practice & Action Guidelines
To minimize the ductile fracture dimple structure, take the following measures:
• Use correct welding temperature and time to cool the structure more evenly.
• Make sure the weld pool is clean and free of chemical triggers for pore formation.
• Use suitable filler materials or protective coatings to minimize mechanical loads.