Substitutional Alloying Atoms
Substitutional alloying atoms are atoms with comparable atomic radii that occupy regular lattice sites in the base metal and alter its properties. They form solid solutions and affect electronic and elastic properties.
Physical-Chemical Mechanism of Action
Substitutional alloying atoms have similar atomic radii as the base metal. They can occupy the regular lattice sites of the metal, leading to the formation of mixed crystals. This changes the electronic and elastic structure of the material.
Metallurgical Relevance & Welding Risks
Introducing substitutional alloying atoms can affect the strength, hardness, and toughness of the metal. Wrong selection or concentration of these atoms can lead to increased stress buildup and cracking. During welding, these properties can be altered, affecting the microstructure and mechanical properties of the weld.
Workshop Practice & Action Points
When alloying or welding metals with substitutional alloying atoms, it's important to pay attention to the correct composition and concentration. Use appropriate welding processes and parameters to maintain the material's mechanical properties. Regularly check the composition and microstructure of the alloy.