Fig. 2: Tailoring the driving force for recrystallization by varying laser hatch spacing.
From: Additive manufacturing of alloys with programmable microstructure and properties
a Optical micrograph showing the arrangement of melt pools in our samples. b Estimated geometrically necessary dislocation (GND) densities as measured by EBSD and from the cumulative plastic strains obtained through finite element model (FEM). The values refer to as-built SS316L samples. The experimental melt pool width (w) is 70 µm in this work. c Cross-section EBSD KAM maps from the top surface and top view KAM map from the center region of an SS316L sample produced using a hatch spacing of 35 µm (h = 35 µm). Yellow curves indicate melt pool boundaries. Red dashed lines indicate centerlines. d KAM maps highlighting the difference in crystal misorientation distribution between samples produced using h = 35 µm and h = 10 µm, which correspond to the first and last data point (enclosed within a dashed circle) in (b), respectively.
