Intergranular Fracture
Intergranular fracture occurs due to microscopic precipitates or impurities at grain boundaries and leads to sudden, often catalyzed material failure.
Physical-Chemical Mechanism of Action
Intercrystalline fracture occurs when microscopic precipitates or impurities are present at the grain boundaries of the material. These areas can act as weak points and lead to sudden failure under mechanical stress.
Metallurgical Relevance & Welding Risks
Intercrystalline fracture can occur in the weld zone if the material is not properly prepared or processed. This leads to sudden cracking and failure of the material, which is especially dangerous at high temperatures and under mechanical stress.
Workshop Practice & Instructions
To avoid intercrystalline fracture, the following measures should be taken:
• Use high-purity material and remove microscopic precipitates before welding.
• Ensure the material is properly prepared, including correct temperature control during the welding process.
• Use a suitable welding technique and material compatible with the base material.