Laser-based powder bed fusion of Ti-6Al-4V powder modified with SiO2 nanoparticles

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Autoren

  • Nicole Emminghaus
  • Robert Bernhard
  • Jörg Hermsdorf
  • Stefan Kaierle

Externe Organisationen

  • Laser Zentrum Hannover e.V. (LZH)
Forschungs-netzwerk anzeigen

Details

OriginalspracheEnglisch
Seiten (von - bis)1679-1694
Seitenumfang16
FachzeitschriftInternational Journal of Advanced Manufacturing Technology
Jahrgang122
Ausgabenummer3-4
Frühes Online-Datum25 Aug. 2022
PublikationsstatusVeröffentlicht - Sept. 2022

Abstract

In laser-based powder bed fusion of metals (PBF-LB/M), residual oxygen in the processing atmosphere is regarded as disruptive and disadvantageous for the manufacturing process and the resulting component properties. A novel approach to eliminate residual oxygen is to add small amounts of silane to the argon process gas. Silane eliminates residual oxygen and forms SiO2 nanoparticles, which in turn can be incorporated into the powder during the process. It is therefore necessary to evaluate the influence of these nanoparticles admixed to the metal powder. In this work, Ti-6Al-4V powder was modified with pyrogenic SiO2 nanoparticles generated by the reaction of a silane argon gas mixture with ambient air. Modified and unmodified powder was analyzed and processed using statistically designed experiments. An improvement of the flow rate according to DIN EN ISO 4490 (from 33.3 to 32.5 s/50 g) and increase of apparent density according to DIN EN ISO 3923 (from 2.52 to 2.58 g/cm3) could be observed after powder modification. No statistically significant effects of the modification on roughness, porosity, and hardness were found. The results demonstrate that powder modification using silane can lead to enhanced flowability without affecting the PBF-LB processing window of Ti-6Al-4V.

ASJC Scopus Sachgebiete

Zitieren

Laser-based powder bed fusion of Ti-6Al-4V powder modified with SiO2 nanoparticles. / Emminghaus, Nicole; Bernhard, Robert; Hermsdorf, Jörg et al.
in: International Journal of Advanced Manufacturing Technology, Jahrgang 122, Nr. 3-4, 09.2022, S. 1679-1694.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Emminghaus N, Bernhard R, Hermsdorf J, Kaierle S. Laser-based powder bed fusion of Ti-6Al-4V powder modified with SiO2 nanoparticles. International Journal of Advanced Manufacturing Technology. 2022 Sep;122(3-4):1679-1694. Epub 2022 Aug 25. doi: 10.1007/s00170-022-09944-0
Emminghaus, Nicole ; Bernhard, Robert ; Hermsdorf, Jörg et al. / Laser-based powder bed fusion of Ti-6Al-4V powder modified with SiO2 nanoparticles. in: International Journal of Advanced Manufacturing Technology. 2022 ; Jahrgang 122, Nr. 3-4. S. 1679-1694.
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title = "Laser-based powder bed fusion of Ti-6Al-4V powder modified with SiO2 nanoparticles",
abstract = "In laser-based powder bed fusion of metals (PBF-LB/M), residual oxygen in the processing atmosphere is regarded as disruptive and disadvantageous for the manufacturing process and the resulting component properties. A novel approach to eliminate residual oxygen is to add small amounts of silane to the argon process gas. Silane eliminates residual oxygen and forms SiO2 nanoparticles, which in turn can be incorporated into the powder during the process. It is therefore necessary to evaluate the influence of these nanoparticles admixed to the metal powder. In this work, Ti-6Al-4V powder was modified with pyrogenic SiO2 nanoparticles generated by the reaction of a silane argon gas mixture with ambient air. Modified and unmodified powder was analyzed and processed using statistically designed experiments. An improvement of the flow rate according to DIN EN ISO 4490 (from 33.3 to 32.5 s/50 g) and increase of apparent density according to DIN EN ISO 3923 (from 2.52 to 2.58 g/cm3) could be observed after powder modification. No statistically significant effects of the modification on roughness, porosity, and hardness were found. The results demonstrate that powder modification using silane can lead to enhanced flowability without affecting the PBF-LB processing window of Ti-6Al-4V.",
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T1 - Laser-based powder bed fusion of Ti-6Al-4V powder modified with SiO2 nanoparticles

AU - Emminghaus, Nicole

AU - Bernhard, Robert

AU - Hermsdorf, Jörg

AU - Kaierle, Stefan

N1 - Funding Information: Open Access funding enabled and organized by Projekt DEAL. Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) — Project-ID 394563137 — SFB 1368.

PY - 2022/9

Y1 - 2022/9

N2 - In laser-based powder bed fusion of metals (PBF-LB/M), residual oxygen in the processing atmosphere is regarded as disruptive and disadvantageous for the manufacturing process and the resulting component properties. A novel approach to eliminate residual oxygen is to add small amounts of silane to the argon process gas. Silane eliminates residual oxygen and forms SiO2 nanoparticles, which in turn can be incorporated into the powder during the process. It is therefore necessary to evaluate the influence of these nanoparticles admixed to the metal powder. In this work, Ti-6Al-4V powder was modified with pyrogenic SiO2 nanoparticles generated by the reaction of a silane argon gas mixture with ambient air. Modified and unmodified powder was analyzed and processed using statistically designed experiments. An improvement of the flow rate according to DIN EN ISO 4490 (from 33.3 to 32.5 s/50 g) and increase of apparent density according to DIN EN ISO 3923 (from 2.52 to 2.58 g/cm3) could be observed after powder modification. No statistically significant effects of the modification on roughness, porosity, and hardness were found. The results demonstrate that powder modification using silane can lead to enhanced flowability without affecting the PBF-LB processing window of Ti-6Al-4V.

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