Experimental determination of solute redistribution behavior during solidification of additively manufactured 316L

Chemical measurement points obtained with energy dispersive X-ray spectroscopy (EDS) in scanning transmission electron microscopy (STEM) were processed by a modified weighted interval rank sort (WIRS) method in order to study the solute redistribution during solidification of an additively manufactured 316L stainless steel. Scheil-Gulliver calculations give a good first approximation, although the extent of segregation is lower experimentally than theoretically. These discrepancies are believed to be due to the fast solidification rate involved. STEM-EDS data processed by the modified WIRS method is a strong and reliable technique for characterizing the segregation profile for additively manufactured metals, and the proposed method is shown to reduce the experimental uncertainty associated with the quantification of minor elements. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Automated summary

The modified WIRS method for processing STEM-EDS data is a strong and reliable technique for characterizing the segregation profile of additively manufactured metals, reducing the experimental uncertainty associated with the quantification of minor elements.