Lamellar Tearing
Delamination is the separation of layers in the material under the weld due to high tensile stresses and non-metallic inclusions. It leads to a fine, layered disintegration.
Physical-Chemical Mechanism
Delamination occurs when tensile stresses are applied perpendicular to the rolling direction and flat non-metallics like silicon or titanium are present. These stresses cause layers in the base material to tear apart under the weld.
Metallurgical Relevance & Welding Risks
Delamination can cause the material to split into fine, laminar layers. This can seriously weaken the weld and mess up its mechanical properties, leading to cracks or distortion in the part.
Workshop Practice & Handling Instructions
To avoid delamination, make sure the rolling process is done right. That means controlling temperature properly and using fillers or binders to minimize flat non-metallic inclusions. Good weld quality and careful rolling are key.