Fig. 1: Microstructure of L-PBF as-printed Al0.5CrCoFeNi high-entropy alloy.
a A representative pseudo-3D microstructure of solidification cells analogous to a micro-scale honeycomb-like structure. b An inverse pole figure (IPF) map showing the near-uniform crystallographic orientation of the solidification cells in different grains and the corresponding phase map in c showing the consistent distribution of the B2 (bcc) phase on the fcc cell boundaries. d Bright-field TEM images of a solidification cell show the morphology of the B2 phase on the cellular boundaries, and the magnified images from locations 1, 2, and 3 show the nanometer-scale bridges (nano-bridges) connecting cells, where high-density dislocations are observed. e Quantitative compositional analysis by atom probe tomography (APT) shows the distribution of different elements in the fcc cells and B2 phase on the cellular boundaries.
