Intermediate phase
An intermediate phase forms in a two- or multi-component alloy system when it has its own crystal lattice structure and deviates strongly from the pure elements. It can occur at specific compositions and temperatures.
Physical-Chemical Mechanism of Action
An intermediate phase forms when two or more metals or alloys in a system mix in such a way that a new crystal structure is created. This structure differs strongly from the lattice structures of the individual components and can arise from specific compositions and temperatures.
Metallurgical Relevance & Risks in Welding
Intermediate phases can cause problems during welding, such as deformation or the occurrence of cracks. They affect the mechanical properties of the weld and can alter the structure. It is important to control the composition and temperatures during the welding process to avoid such phases or keep them under control.
Workshop Practice & Instructions
To avoid intermediate phases, pay attention to the specific compositions when selecting the alloy and welding process. For certain materials, it can be helpful to perform welding under controlled temperatures or apply additional post-weld treatment steps.