Thermal creep
Under heat influence, time-dependent plastic deformation occurs under constant mechanical load, leading to long-term elongation.
Physikalisch-chemischer Wirkmechanismus
At elevated temperatures, atoms in the material are less tightly bound and can move more easily. This allows continuous plastic deformation under constant load without immediate failure.
Metallurgical Relevance & Welding Risks
Creep under heat influence can lead to long-term elongation and deformation of parts. This can cause stress buildup, cracking, or even degradation of the material's mechanical properties. It is especially relevant in high-load applications such as machine shafts or structural components.
Werkstattpraxis & Handlungsanweisungen
To minimize creep, reduce operating temperatures when possible. When selecting material, a low creep rate (KZ) is important. For high-load applications, special treatments like normalizing or austenitizing may be recommended. Regularly check and optimize mechanical load to reduce stress.