Abstract Scope |
Understanding plasticity events at the grain scale is key to the development of mesoscale models. High Energy x-ray Diffraction Microscopy (HEDM) has proven effective for determining grain-averaged elastic strain and grain orientation in a sample, but it provides no local strain information. Bragg Coherent Diffraction Imaging (BCDI) has been shown to provide 3-D strain fields in individual grains but has largely been applied only to nano-particles, rather than polycrystals. We propose combining these two methods to image the interaction between several grains in a polycrystalline sample. HEDM gives us a 3D map of a microstructure in a sample, providing orientations for each grain. These orientations can be used to locate Bragg peaks for neighboring grains, allowing us to employ BCDI to investigate, in 3D, the interaction between two neighboring grains during heating or loading and the migration of defects within a particular grain. |