Yield Strength
Yield strength (ReH / Rp0.2) is the stress value at which a material transitions from purely elastic deformation to plastic deformation. It indicates when the material is permanently deformed and can serve as an indicator of mechanical properties.
Physicochemical Mechanism of Action
The yield strength (ReH / Rp0.2) is the stress value at which a material transitions from purely elastic deformation to plastic deformation. This point is reached when the internal stress in the material is so high that it can no longer fully recover and instead deforms permanently.
Metallurgical Relevance & Welding Risks
The yield strength is crucial for the strength and hardness of a material. A material with a low yield strength breaks easily, while a material with a high yield strength is more formable and flexible. In a weld, too high stress or too fast cooling can exceed the yield strength, leading to cracks and distortion.
Workshop Practice & Action Guidelines
To ensure that the yield strength is not exceeded, it is important to ensure adequate stress and controlled cooling. When selecting the welding process and materials, the specific yield strength should be considered. For metals with a high yield strength (e.g., high-strength steel), slow cooling is recommended to avoid cracks. For metals with a low yield strength (e.g., aluminum), stress should be regulated and cooling controlled to prevent distortion.