Eutectic phase transformation
The eutectic phase transformation is a process where a liquid phase transforms simultaneously into two solid phases at a constant temperature. This results in fine, lamellar, or globular composite structures.
Physical-Chemical Mechanism of Action
The eutectic phase transformation occurs at certain compositions and temperatures. A liquid phase condenses simultaneously into two different solid phases, resulting in a fine composite structure from these two solid phases.
Metallurgical Relevance & Risks in Welding
This phase transformation can lead to fine lamellar or globular composite structures at certain compositions and temperatures. This can affect mechanical properties such as toughness and hardness. Improper handling can lead to uneven cooling and thus to fine cracks or damage in the structure.
Workshop Practice & Action Instructions
To successfully carry out the eutectic phase transformation, it is important to ensure the correct composition and temperature. During cooling, careful work is necessary to achieve uniform hardening. This can be achieved through controlled cooling processes or special cooling agents.