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キーワード:
3D printers; Breeding blankets; Chromium alloys; Deposition; Dispersions; Iron alloys; Microhardness; Microstructure; Nanoparticles; Photonic bandgap fibers; Synthesis (chemical), Directed energy; Iron chromium alloy; Laser fragmentation; Laser powders; Micro-structural; Oxide dispersion strengthened steel; Powder composites, Pulsed lasers
要旨:
In this contribution, the effect of nanoparticle additivation on the microstructure and microhardness of oxide dispersion strengthened steels (ODS) manufactured by laser powder bed fusion (L-PBF) and directed energy deposition (DED) additive manufacturing (AM) is studied. The powder composites are made of micrometer-sized iron-chromium-alloy based powder which are homogenously decorated with Y2O3 nanoparticles synthesized by pulsed laser fragmentation in water. Consolidated by L-PBF and DED, an enhanced microhardness of the AM-built ODS sample is found. This increase is related to the significant microstructural differences found between the differently processed samples. © 2020 The Authors. Published by Elsevier B.V.