Thermal Residual Stress Field

Physical-Chemical Mechanism of Action

Different cooling rates in a component create stresses. Stronger cooling in certain areas causes rapid contraction, while other areas cool more slowly and stress less.

Metallurgical Relevance & Risks in Welding

These stresses can lead to cracks, especially if they exceed the hardness of the material. In the workshop, this can arise from uneven cooling or faulty welding.

Workshop Practice & Action Instructions

To minimize thermal residual stress fields, ensure uniform cooling. Use cooling wall systems or cooling gas to regulate the cooling rate across the entire component. When welding, it is important to cool the weld as quickly as possible to avoid stresses.