Ductile Fracture
Ductile fracture is a failure mode through microscopic void coalescence and requires a lot of energy. It often announces itself by necking.
Physical-Chemical Mechanism of Action
Ductile fracture occurs through microscopic void formation in the material, which collide and grow under high mechanical stress. This requires high energy and leads to sudden failure.
Metallurgical Relevance & Welding Risks
Ductile fracture can occur when stress is not evenly distributed or when mechanical stress is too high during welding. It leads to sudden cracking and can significantly shorten component life.
Workshop Practice & Action Guidelines
To avoid ductile fracture, ensure even stress distribution and limit mechanical stress. Use suitable welding methods like TIG for demanding applications. Make sure the material is properly pre-treated and welding parameters (temperature, voltage) are optimally set.