Demixing Process
The segregation process is the transformation process in which a homogeneous solution divides into different phases during cooling. This can lead to grain formation and distortion.
Physicochemical Mechanism of Action
During cooling, certain atoms or molecules in a material condense together, leading to a phase transformation. This process can result in grain formation and distortion in the material.
Metallurgical Relevance & Risks in Welding
An uncontrolled segregation process can lead to fine grains and distortion, which impairs the strength and toughness of the material. This increases the risk of cracks and hot cracks in the weld.
Workshop Practice & Instructions
To ensure a controlled segregation process, the cooling rates must be precisely controlled. This can be achieved by selecting the appropriate welding process and correct machine settings. Too rapid cooling can lead to glass-hard martensite, while too slow cooling can result in large grains and distortion.