Substitutional solid solution
A substitutional solid solution forms when atoms of one substance replace the regular lattice sites of the base metal in a crystal. This can affect mechanical properties.
Physical-Chemical Mechanism of Action
In a substitutional mixed crystal, atoms of one substance replace the regular lattice sites of the base metal. This can lead to a change in crystal structure if the atomic sizes differ greatly.
Metallurgical Relevance & Welding Risks
Substitutional mixed crystals can affect the mechanical properties of the material. For example, too high a concentration of substitutional atoms can lead to grain coarsening, which reduces toughness. Additionally, this can lead to the development of cracks or wear spots.
Workshop Practice & Action Points
When welding, it's important to ensure an optimal composition of the metal to avoid substitutional mixed crystals. This can be achieved by choosing the right filler materials and controlling the melting processes. If there are problems with mechanical properties, check the composition and crystal structure of the material.