Deformation-Induced Precipitation
Strain-induced precipitation: during mechanical working, fine precipitates form at dislocations and grain boundaries, increasing strength.
Physical-Chemical Mechanism of Action
During stretching or deformation of metals, local stresses can occur, leading to localized precipitation processes. These processes are more pronounced at dislocations and grain boundaries.
Metallurgical Relevance & Welding Risks
Deformation-induced precipitation can increase the material's strength by creating finer structures. However, it can also lead to cracking and grain growth if the material is overstressed or cooled insufficiently.
Workshop Practice & Action Guidelines
To leverage the positive effects of deformation-induced precipitation and minimize risks, it is important:
• To control material supply (e.g., temperature, pressure).
• To ensure careful cooling after stretching or deformation.
• For hard-to-form materials, to perform slow and continuous deformation.