Three‐dimensional α colony characterization and prior‐β grain reconstruction of a lamellar Ti–6Al–4V specimen using near‐field high‐energy X‐ray diffraction microscopy

摘要: Near-field high energy X-ray diffraction microscopy (nf-HEDM) has been used to characterize the 3-D crystallographic orientation field of the hexagonal close-packed (hcp) α phase in a bulk Ti-6Al-4V specimen with lamellar (β-annealed) microstructure. These data have been segmented using misorientation-based grain finding algorithm, providing unprecedented information about complex morphologies and spatial misorientation distributions the transformed lamellae colonies. A Burgers relationship-based flood fill algorithm has implemented reconstruct orientations the high temperature body centred cubic (bcc) prior-β grains. The combination these has been gain understanding role structure on formation of specific observed transformed α colony structures. It is hoped that this can be develop transformation structures optimized for specific applications produce more physically realistic synthetic microstructures use simulations.