Non-oxide precipitates in additively manufactured austenitic stainless steel.

ABSTRACT: 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 ≥ 0.75T_m (melting point) and temperature rates ≤ 10⁵ K/s, which is the upper e

SUBMITTER: Upadhyay MV 

PROVIDER: S-EPMC8128905 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature