Characterization of Anomalous Grains in FeCo Magnetic Alloys

Abstract Heat-treated FeCo-based magnetic alloys were characterized using a suite of electron microscopy techniques to gain insight into their structural properties. Electron channeling contrast imaging (ECCI) in the scanning microscope (SEM) found unique grains towards outer edge FeCo sample with nonuniform background contrast. High-magnification ECCI these revealed weblike network defects that not observed standard uniform grains. High-resolution backscattered diffraction (HR-EBSD) confirmed defect structures be dislocation networks and additionally subgrain boundaries within The content suggests they are unrecrystallized grains, can used as rapid method quantify To demonstrate garnered via on was imaged before after micro indentation. This experiment showed slip bands propagate throughout material until interacting networks, suggesting specific provide barrier plastic deformation. Taken together, results show how better understand failure mechanisms provides further evidence play critical role brittle alloys.