An examination of local strain fields evolution in ductile cast iron through micromechanical simulations based on 3D imaging

Microscopic digital volume correlation (DVC) and finite element precoalescence strain evaluations are compared for two nodular cast iron specimens. Displacement fields from \textit{in-situ} 3D synchrotron laminography images obtained by DVC. Subsequently the microstructure is explicitely meshed considering nodules as voids. Boundary conditions applied DVC measurement. Image segmentation-related uncertainties taken into account observed to be negligible with respect differences between levels. Macroscopic well local levels in coalescing ligaments voids nucleated at large graphite compared. consistently predicted. A very good agreement one of specimens, while second specimen presents some discrepancies. Limitations modeling numerical framework discussed light these differences. discussion use coalescence indicator initiated.