Microscopic Residual Stresses of the Second Kind
Micro residual stresses of the second kind are stresses between adjacent grains, resulting from differences in elastic or plastic properties. They affect material flow and can lead to fatigue.
Physical-Chemical Mechanism of Action
Micro residual stresses of the second kind arise when adjacent crystallites have different elastic or plastic properties. These stresses can result from various causes, such as uneven melting times, non-uniform cooling, or mechanical loads.
Metallurgical Relevance & Welding Risks
These stresses affect the local flow behavior of the material and can lead to fatigue. They can also cause cracks and deformations, especially when they persist over longer periods or occur at high temperatures.
Workshop Practice & Action Guidelines
To minimize micro residual stresses of the second kind, it is important to ensure uniform cooling and careful welding planning. Use welding processes and shielding agents that generate low stress. At high temperatures, ensure continuous cooling and avoid rapid temperature changes.