Band Segregation
Band segregation is a band-like enrichment of alloying elements that occurs during deformation or uneven cooling. It leads to anisotropic mechanical properties.
Physico-Chemical Mechanism of Action
Band segregation occurs when certain alloying elements become concentrated during deformation or uneven cooling. This can be caused by mechanical stresses or chemical reactions.
Metallurgical Relevance & Risks in Welding
Band segregation leads to anisotropic mechanical properties, meaning strength and hardness are different in different directions. This can lead to uneven stress distribution and increased crack risk, especially under dynamic loading.
Shop Practice & Action Instructions
To avoid or minimize band segregation:
• Use homogeneous melting conditions and controlled cooling processes.
• Ensure even deformation.
• Inspect the microstructure after welding for anomalies or uneven structure.