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Nanoparticle Tracing during Laser Powder Bed Fusion of Oxide Dispersion Strengthened Steels

Yang, Yangyiwei ; Doñate-Buendía, Carlos ; Oyedeji, Timileyin David ; Gökce, Bilal ; Xu, Bai-Xiang (2021):
Nanoparticle Tracing during Laser Powder Bed Fusion of Oxide Dispersion Strengthened Steels. (Publisher's Version)
In: Materials, 14 (13), MDPI, e-ISSN 1996-1944,
DOI: 10.26083/tuprints-00019391,
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Item Type: Article
Origin: Secondary publication via sponsored Golden Open Access
Status: Publisher's Version
Title: Nanoparticle Tracing during Laser Powder Bed Fusion of Oxide Dispersion Strengthened Steels
Language: English
Abstract:

The control of nanoparticle agglomeration during the fabrication of oxide dispersion strengthened steels is a key factor in maximizing their mechanical and high temperature reinforcement properties. However, the characterization of the nanoparticle evolution during processing represents a challenge due to the lack of experimental methodologies that allow in situ evaluation during laser powder bed fusion (LPBF) of nanoparticle-additivated steel powders. To address this problem, a simulation scheme is proposed to trace the drift and the interactions of the nanoparticles in the melt pool by joint heat-melt-microstructure–coupled phase-field simulation with nanoparticle kinematics. Van derWaals attraction and electrostatic repulsion with screened-Coulomb potential are explicitly employed to model the interactions with assumptions made based on reported experimental evidence. Numerical simulations have been conducted for LPBF of oxide nanoparticle-additivated PM2000 powder considering various factors, including the nanoparticle composition and size distribution. The obtained results provide a statistical and graphical demonstration of the temporal and spatial variations of the traced nanoparticles, showing ~55% of the nanoparticles within the generated grains, and a smaller fraction of ~30% in the pores, ~13% on the surface, and ~2% on the grain boundaries. To prove the methodology and compare it with experimental observations, the simulations are performed for LPBF of a 0.005 wt % yttrium oxide nanoparticle-additivated PM2000 powder and the final degree of nanoparticle agglomeration and distribution are analyzed with respect to a series of geometric and material parameters.

Journal or Publication Title: Materials
Journal volume: 14
Number: 13
Publisher: MDPI
Collation: 24 Seiten
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Functional Materials
Date Deposited: 30 Aug 2021 12:19
Last Modified: 30 Aug 2021 12:19
DOI: 10.26083/tuprints-00019391
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-193919
Additional Information:

Keywords: additive manufacturing; laser powder bed fusion; selective laser melting; oxide dispersion strengthened steel; phase-field model; finite element simulation; nanoparticle interaction

URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/19391
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