Publication detail

The Dispersion-Strengthening Effect of TiN Nanoparticles Evoked by Ex Situ Nitridation of Gas-Atomized, NiCu-Based Alloy 400 in Fluidized Bed Reactor for Laser Powder Bed Fusion

ROTH, J. ŠULÁK, I. GÁLÍKOVÁ, M. DUVAL, A. BOISSONNET, G. PEDRAZA, F. KRUPP, U. JAHNS, K.

Original Title

Type

journal article in Web of Science

Language

English

Original Abstract

Throughout recent years, the implementation of nanoparticles into the microstructure of additively manufactured (AM) parts has gained great attention in the material science community. The dispersion strengthening (DS) effect achieved leads to a substantial improvement in the mechanical properties of the alloy used. In this work, an ex situ approach of powder conditioning prior to the AM process as per a newly developed fluidized bed reactor (FBR) was applied to a titanium-enriched variant of the NiCu-based Alloy 400. Powders were investigated before and after FBR exposure, and it was found that the conditioning led to a significant increase in the TiN formation along grain boundaries. Manufactured to parts via laser-based powder bed fusion of metals (PBF-LB/M), the ex situ FBR approach not only revealed a superior microstructure compared to unconditioned parts but also with respect to a recently introduced in situ approach based on a gas atomization reaction synthesis (GARS). A substantially higher number of nanoparticles formed along cell walls and enabled an effective suppression of dislocation movement, resulting in excellent tensile, creep, and fatigue properties, even at elevated temperatures up to 750 degrees C. Such outstanding properties have never been documented for AM-processed Alloy 400, which is why the demonstrated FBR ex situ conditioning marks a promising modification route for future alloy systems.

Keywords

Alloy 400; fluidized bed reactor; laser powder bed fusion; internal nitridation; TiN nanoparticle; dispersion strengthening

Authors

ROTH, J.; ŠULÁK, I.; GÁLÍKOVÁ, M.; DUVAL, A.; BOISSONNET, G.; PEDRAZA, F.; KRUPP, U.; JAHNS, K.

Released

1. 10. 2024

Publisher

MDPI

Location

BASEL

ISBN

2504-4494

Periodical

Journal of Manufacturing and Materials Processing

Year of study

Number

State

Swiss Confederation

Pages from

Pages to

Pages count

URL

https://www.mdpi.com/2504-4494/8/5/223

Full text in the Digital Library

http://hdl.handle.net/11012/250831

BibTex

@article{BUT191211,
  author="Jan-Philipp {Roth} and Ivo {Šulák} and Markéta {Gálíková} and Antoine {Duval} and Germain {Boissonnet} and Fernando {Pedraza} and Ulrich {Krupp} and Katrin {Jahns}",
  title="The Dispersion-Strengthening Effect of TiN Nanoparticles Evoked by Ex Situ Nitridation of Gas-Atomized, NiCu-Based Alloy 400 in Fluidized Bed Reactor for Laser Powder Bed Fusion",
  journal="Journal of Manufacturing and Materials Processing",
  year="2024",
  volume="8",
  number="5",
  pages="29",
  doi="10.3390/jmmp8050223",
  issn="2504-4494",
  url="https://www.mdpi.com/2504-4494/8/5/223"
}