Solid solution strengthening
Solid solution hardening increases the strength of metals by incorporating foreign atoms into the host lattice, which hinders the movement of atoms and thus restricts their mobility.
Physical-Chemical Mechanism of Action
Foreign atoms are incorporated into the metal, altering the lattice of the host metal. These foreign atoms can affect atom positions and hinder the movement of dislocations in the lattice.
Metallurgical Relevance & Welding Risks
Solid solution hardening can lead to increased strength, making the material stronger. However, it can also lead to increased stress concentration, which can cause cracking and wear problems if not handled correctly.
Shop Practice & Action Guidelines
To control solid solution hardening, welding parameters such as temperature and time must be precisely maintained. For high-hardening steels, it is important to perform slow cooling after welding to stabilize the structure and avoid cracking.