Grain Boundary Segregation Coefficient
The grain boundary segregation coefficient shows how strongly a metal concentrates its additives at the grain boundaries during cooling. High segregation can lead to porosity and loss of properties.
Physicochemical Mechanism of Action
When a metal cools, atoms shift and often cluster at grain boundaries. This process is called segregation. The grain boundary segregation coefficient measures how strong this clustering is.
Metallurgical Relevance & Risks in Welding
High segregation can lead to porosity and loss of properties. This can impair the strength and toughness of the material and cause cracks. It is especially important in high-performance metals, such as steel or nickel alloys.
Workshop Practice & Action Instructions
To minimize segregation, cooling should be controlled. This can be achieved by choosing the right welding process and the correct cooling configuration. For high-performance metals, slow and uniform cooling is essential.