Please use this identifier to cite or link to this item:
https://hdl.handle.net/20.500.14279/30603
Title: | Laser powder bed fusion of 316L stainless steel with 2 wt.% nanosized SiO2 additives: Powder processing and consolidation |
Authors: | Stylianou, Rafael Evangelou, Angelos Loizou, Alexandros Kim, Donghyuk Wharton, Julian Koutsokeras, Loukas E. Constantinides, Georgios Delimitis, Andreas Kyratsi, Theodora |
Major Field of Science: | Engineering and Technology |
Field Category: | Mechanical Engineering |
Keywords: | 316L stainless steel;Ball milling;Crystallographic texture;Melt pools;Selective laser melting;Silica |
Issue Date: | 1-Sep-2023 |
Source: | Powder Technology, 2023, vol. 427 |
Volume: | 427 |
Journal: | Powder Technology |
Abstract: | Gas atomized 316L stainless steel powder was processed with 2 wt.% of nanosized SiO2 in a planetary ball milling (BM) system to produce feedstock material for laser powder bed fusion (L-PBF). X-ray diffraction (XRD) of powders revealed the development of micro-strains over increasing milling durations and the strain-induced ferrite formation. BM was limited in duration to preserve the austenitic phase and morphological characteristics analyzed by electron microscopy. In turn, 316L-2wt.% SiO2 feedstock powder was consolidated by L-PBF with varied process parameters and scanning strategies, that demonstrated a maximum density of 7.84 g/cm3 and relatively stable microhardness values close to 220 HV. A distinct (110) preferred orientation was observed in XRD pole figures of austenite for deeper melt pools over the building direction, whereas in-plane alignment reflected variations in scanning strategy. Furthermore, electron backscatter diffraction revealed columnar grains accompanied by the suspected depletion of SiO2, while electrochemical behavior displayed consistent characteristics. |
URI: | https://hdl.handle.net/20.500.14279/30603 |
ISSN: | 00325910 |
DOI: | 10.1016/j.powtec.2023.118714 |
Rights: | © Elsevier Attribution-NonCommercial-NoDerivatives 4.0 International |
Type: | Article |
Affiliation : | University of Cyprus University of Southampton Cyprus University of Technology University of Stavanger |
Publication Type: | Peer Reviewed |
Appears in Collections: | Άρθρα/Articles |
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