Thermally Activated Creep Deformation
Thermally activated creep deformation is the slow, continuous plastic deformation of materials under mechanical load at high temperatures. It results from diffusion-controlled dislocation climb processes and can lead to damage in the workpiece.
Physical-Chemical Mechanism of Action
Thermally activated creep deformation occurs at high temperatures when materials are under constant mechanical load. The movement of atoms within the crystal lattice is controlled by diffusion, leading to slow deformation.
Metallurgical Relevance & Welding Risks
This deformation can cause damage to the workpiece, especially in complex components under high temperatures and mechanical stress. It can reduce strength and deform the material, leading to functional failures or cracks.
Workshop Practice & Procedures
To minimize thermally activated creep deformation, avoid high temperatures and keep the material under as little mechanical load as possible during welding. For complex parts, careful planning and control of the welding process is essential.