Page 355 - IJB-10-1

International Journal of Bioprinting Corrosion behavior of SLM-prepared 316L steel

AM-prepared workpiece exceeded 300 µm. Sample 20 (71.7 %) among the swaged microstructures was observed
featured the greatest grain size inhomogeneity of all the within sample 20. The occurrence of misorientations was
swaged samples, as some of the grains were still relatively relatively scarce within sample 20, which corresponded
large and exceeded the diameter of 100 µm (although the to the relatively low applied swaging ratio (Figure 5A).
majority of the grains was refined). Sample 17 featured Increasing the imposed strain resulted in the accumulation
the majority of refined grains, although the remnants of of dislocations and development of substructure, i.e., the
larger grains with the diameters of about 100 µm were LAGB fraction increased at the expense of the HAGB one
still evident. The structure within sample 15, on the other with continuing swaging (the HAGB fraction for sample
hand, exhibited no evident traces of grains with sizes 17 was 65.4%). Also, the occurrence of misorientations
reaching up to 100 µm. increased noticeably for this sample (Figure 5B), primarily
by the effect of the increasing amount of the imposed
The LAGB and HAGB fractions for the swaged samples shear strain . The HAGB fraction then decreased with
59
20, 17, and 15 are characterized in Figure 5A–C, which also continuing swaging to 59.5% for sample 15. In other
depict the Kernel average misorientation (KAM) maps for words, the LAGB fraction increased for this sample, and
the respective samples. The maximum limit for KAM was the microstructure also exhibited many misorientations
set to 5° to reliably depict relative densities of dislocations (Figure 5C), collectively pointing to the development of
within the microstructures. The highest HAGB fraction substructure (as discussed in section 3.4).

Figure 5. Kernel average misorientation (KAM) maps for structures of (A) sample 20, (B) sample 17, and (C) sample 15.

Volume 10 Issue 1 (2024) 347 https://doi.org/10.36922/ijb.1416