Weigold, Matthias ; Merschroth, Holger (2023)
Investigation of temperature gradient and solidification rate in laser-based powder bed fusion using a high-speed camera to evaluate local microstructure characteristics.
In: CIRP Annals - Manufacturing Technology, 72 (1)
doi: 10.1016/j.cirp.2023.04.031
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Laser-based powder bed fusion of metallic materials is widely used in industrial application with major challenges for safety-critical components. However, the layerwise build-up and process parallel monitoring systems offer the potential of direct quality evaluation. This work proposes a novel process monitoring concept to enable the local evaluation of the solidification and consequently an estimation of the microstructure using an on-axis high-speed camera. Based on characteristic intensity values of the phase transitions, the solidification rate and temperature gradient in scan vector direction are determined. A linear regression model estimates the mean grain diameter along the melt path.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Weigold, Matthias ; Merschroth, Holger |
| Art des Eintrags: | Bibliographie |
| Titel: | Investigation of temperature gradient and solidification rate in laser-based powder bed fusion using a high-speed camera to evaluate local microstructure characteristics |
| Sprache: | Englisch |
| Publikationsjahr: | 2023 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | CIRP Annals - Manufacturing Technology |
| Jahrgang/Volume einer Zeitschrift: | 72 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.1016/j.cirp.2023.04.031 |
| Kurzbeschreibung (Abstract): | Laser-based powder bed fusion of metallic materials is widely used in industrial application with major challenges for safety-critical components. However, the layerwise build-up and process parallel monitoring systems offer the potential of direct quality evaluation. This work proposes a novel process monitoring concept to enable the local evaluation of the solidification and consequently an estimation of the microstructure using an on-axis high-speed camera. Based on characteristic intensity values of the phase transitions, the solidification rate and temperature gradient in scan vector direction are determined. A linear regression model estimates the mean grain diameter along the melt path. |
| Freie Schlagworte: | additive manufacturing, monitoring, micro structure |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Institut für Produktionsmanagement und Werkzeugmaschinen (PTW) 16 Fachbereich Maschinenbau > Institut für Produktionsmanagement und Werkzeugmaschinen (PTW) > TEC Fertigungstechnologie |
| Hinterlegungsdatum: | 28 Sep 2023 06:17 |
| Letzte Änderung: | 28 Sep 2023 06:17 |
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