Point Defect
Lattice defects are atomic irregularities in the crystal lattice, such as vacancies or interstitial atoms. They facilitate diffusion processes and influence the mechanical properties of the material.
Physikalisch-chemischer Wirkmechanismus
Vacancy defects are atomic positions in the crystal lattice that are empty or occupied by other atoms. These defects increase thermal activity and facilitate diffusion of atoms within the material.
Metallurgical Relevance & Welding Risks
Vacancy defects can lead to improved formability as they soften the material. However, they also increase susceptibility to cracking and deformation. If mishandled during welding, this can cause uneven cooling and fine grains in the microstructure, impairing toughness and hardness.
Werkstattpraxis & Handlungsanweisungen
To effectively control vacancy defects, it is important to ensure a constant cooling rate during welding. This can be achieved by choosing the correct welding method and parameters. Avoid too fast or too slow cooling to ensure uniform grain and optimal mechanical properties of the material.