Dislocation Climb Process
The dislocation climb process accelerates high-temperature deformation by diffusion of point defects to dislocation lines, allowing them to bypass obstacles.
Physicochemical mechanism of action
At high temperatures, point defects diffuse along dislocation lines. These lines act as paths through which point defects can bypass obstacles such as edge dislocations. This leads to accelerated diffusion and, consequently, to deformation of the material.
Metallurgical relevance & risks in welding
During welding at high temperatures, the climb process can increase deformation of the material structure. This can lead to unwanted material changes and potentially reduced strength levels if not properly controlled.
Workshop practice & action instructions
To control the climb process in welding, it is important to precisely regulate the maximum temperature and the deformation rate during welding. In high-temperature processes such as MIG welding or TIG welding, particular attention should be paid to uniform heating and cooling to avoid unwanted deformation.