Abstract Scope |
Local residual stresses develop in nearly all crystalline materials during manufacturing or while in service, and they are critical for materials physical and mechanical properties. However, only limited knowledge regarding their spatial distribution exists due to the limitations of standard characterization techniques. In the present work, advanced 3D synchrotron micro-diffraction is used to map the distribution of residual strains/stresses within individual grains in single and two-phase materials. The results are related to parameters such as the crystallographic orientation, grain size, dislocation density and the size of the second phase particles. Thereby breakthroughs have been achieved in the understanding of the origin of local residual stresses. Also results from in-situ investigations of local residual stress upon external loading will be presented. Local residual stress is generally overlooked in current models for microstructural development. It is discussed how the present data sets provide critical input for advancing the models. |