Characterization of nano-scale oxides in austenitic stainless steel processed by powder bed fusion

By Fuyao Yan, Wei Xiong, E. Faierson, Gregory B. Olson. Scripta Materialia, 2018

297 citations recorded by the source corpus.

Abstract Nano-scale MnSiO3 Rhodonite particles were observed in 316L stainless steel fabricated by selective laser melting (SLM). These oxide particles act as Zener-pinning particles providing dragging force to retard grain growth, and enhance strength through the comparison of Hall-Petch effects between SLM 316L and commercial wrought 316L under 1200 °C isothermal heat treatment. The metastable Rhodonite particles were observed to in-situ convert to stable MnCr2O4 Spinel particles at 1200 °C, as predicted by computational thermodynamics. This work introduces nano-scale oxides, which are normally detrimental inclusions, as a new type of particle for grain refinement and strengthening through their refinement in additive manufacturing.

Subfields: Automotive Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/459a0be3b4fcd89b8c8e569aa4cc184686781c34

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In Automotive Engineering

1. M. Laleh
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4. P. Kürnsteiner
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In Mechanical Engineering

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6. P. Kürnsteiner
7. A. Kini
8. S. Primig

Citations in the corpus

• Additive manufacturing of steels: a review of achievements and challenges (2020, background): “[48] Yan F, Xiong W, Faierson E, Olson GB (2018) Character-”
• Steels in additive manufacturing: A review of their microstructure and properties (2020, background): “Also other authors notice the presence of oxides in as-L-PBFproduced steels, be it in 316L austenitic stainless steel (mostly Si- and Mn-rich oxides) [27,50,194], Invar alloy (Fe–36Ni, with Fe3O4 oxides) [195] or maraging steels (TiO2) [124], see Fig.”
• Microstructure and Mechanical Properties of AISI 316L Produced by Directed Energy Deposition-Based Additive Manufacturing: A Review (2020, background): “These oxide structures are typically found during the ladle practice of highcontent Mn/Si steels [73,74].”