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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/185943
Non-oxide precipitates in additively manufactured austenitic stainless steel
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Precipitates in an austenitic stainless steel fabricated via any Additive Manufacturing (AM), or 3D printing, technique have been widely reported to be only Mn-Si-rich oxides. However, via Transmission Electron Microscopy (TEM) studies on a 316L stainless steel, we show that non-oxide precipitates (intermetallics, sulfides, phosphides and carbides) can also form when the steel is fabricated via Laser Metal Deposition (LMD) a directed energy deposition-type AM technique. An investigation into their origin is conducted with support from precipitation kinetics and finite element heat transfer simulations. It reveals that non-oxide precipitates form during solidification/cooling at temperatures ≥ 0.75Tm (melting point) and temperature rates ≤ 105 K/s, which is the upper end of the maximum rates encountered during LMD but lower than those encountered during Selective Laser Melting (SLM) a powder-bed type AM technique. Consequently, non-oxide precipitates should form during LMD, as reported in this work, but not during SLM, in consistency with existing literature.
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UPADHYAY, Manas vijay, SLAMA, Meriem ben, GAUDEZ, Steve, MOHANAN, Nikhil, YEDRA CARDONA, Lluis, HALLAIS, Simon, HERIPRE, Eva, TANGUY, Alexandre. Non-oxide precipitates in additively manufactured austenitic stainless steel. _Scientific Reports_. 2021. Vol. 11, núm. 1, pàgs. 10393. [consulta: 27 de gener de 2026]. ISSN: 2045-2322. [Disponible a: https://hdl.handle.net/2445/185943]