Interfacial energy of phases
Interfacial energy is the energy at the contact surface between two phases. It influences nucleation and grain structure.
Physico-Chemical Mechanism
Interfacial energy is the energy at the contact surface between two phases. It arises from the unequal attraction between atoms of different phases. This energy prevents the collapsing and coarsening of grains.
Metallurgical Relevance & Welding Risks
Interfacial energy influences nucleation and grain structure in the weld. Too high interfacial energy can lead to fine, difficult-to-coarsen grains, reducing toughness. On the other hand, too low interfacial energy can lead to coarse grains and possible cracks.
Workshop Practice & Action Items
To achieve the optimal interfacial energy, it is important to precisely control welding parameters such as temperature and time. For steels with high carbon content, the cooling steps should be regulated to create a homogeneous grain structure. For high-performance applications, use materials with low interfacial energy, such as certain alloys or heat exchangers.