Fig. 3: Manipulating the solidification structure by remelting.
From: Additive manufacturing of alloys with programmable microstructure and properties
a A scanning electron micrograph of chemically etched SS316L showing the morphology of the solidification cells intersecting the sample surface. Solute-enriched cell boundaries protrude from the surface (and thus appear bright in the micrograph) as they are more resistant to chemical attack compared to the matrix. b Scanning transmission electron microscopy (STEM) analysis of the internal structure of cell boundaries, which exhibits high dislocation density. c, d Energy disperse spectroscopy (EDS) STEM measurements comparing solute distribution between two h10 samples (using a hatch spacing of 10 µm) produced without and with laser remelting, respectively.
