Cyclic Creep
Fatigue creep is a continuous plastic deformation of materials under cyclic loading and elevated temperature. It leads to long-term elongation without visible changes.
Physicochemical Mechanism of Action
Fatigue creep occurs when materials are continuously plastically deformed under repeated load cycles and elevated temperature. This leads to long-term elongation of the material without visible changes.
Metallurgical Relevance & Risks in Welding
Fatigue creep can lead to long-term material deformation under elevated temperature and cyclic loading. This can cause cracks, deformation, or reduced service life of components. It is particularly relevant in highly loaded applications such as machine shafts or structural members.
Workshop Practice & Action Guidelines
To minimize fatigue creep, operating and environmental conditions should be designed to reduce temperatures and minimize load fluctuations. During welding processing, it is important to ensure an optimal cooling rate (t8/5 between 5 and 25 seconds) to stabilize the steel microstructure and increase toughness.