- Titel
- Influence of Electron Beam Powder Bed Fusion Process Parameters at Constant Volumetric Energy Density on Surface Topography and Microstructural Homogeneity of a Titanium Aluminide Alloy
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:14-qucosa2-1039267
- Quellenangabe
- Advanced engineering materials
Erscheinungsjahr: 2023
Jahrgang: 25
Heft: 13
E-ISSN: 1527-2648
Artikelnummer: 2201871 - Erstveröffentlichung
- 2023
- Abstract (EN)
- In powder bed fusion additive manufacturing, the volumetric energy density EV is a commonly used parameter to quantify process energy input. However, recent results question the suitability of EV as a design parameter, as varying the contributing parameters may yield different part properties. Herein, beam current, scan velocity, and line offset in electron beam powder bed fusion (PBF-EB) of the titanium aluminide alloy TNM–B1 are systematically varied while maintaining an overall constant EV. The samples are evaluated regarding surface morphology, relative density, microstructure, hardness, and aluminum loss due to evaporation. Moreover, the specimens are subjected to two different heat treatments to obtain fully lamellar (FL) and nearly lamellar (NLγ) microstructures, respectively. With a combination of low beam currents, low-to-intermediate scan velocities, and low line offsets, parts with even surfaces, relative densities above 99.9%, and homogeneous microstructures are achieved. On the other hand, especially high beam currents promote the formation of surface bulges and pronounced aluminum evaporation, resulting in inhomogeneous banded microstructures after heat treatment. The results demonstrate the importance of considering the individual parameters instead of EV in process optimization for PBF-EB.
- Andere Ausgabe
- Link zum Artikel, der zuerst in der Zeitschrift „Advanced engineering materials” im Verlag Wiley erschienen ist.
DOI: 10.1002/adem.202201871 - Freie Schlagwörter (EN)
- additive manufacturing, aluminum evaporation, electron beam powder bed fusion, heat treatments, process parameters, titanium aluminides
- Klassifikation (DDC)
- 540
- 660
- Verlag
- Wiley-VCH, Weinheim
- Förder- / Projektangaben
- Deutsche Forschungsgemeinschaft (DFG)
Mikrostruktur- und defektkontrollierte additive Fertigung von gamma Titanaluminiden zur funktionsbasierten Steuerung lokaler Werkstoffeigenschaften
ID: 404665753 - Deutsche Forschungsgemeinschaft (DFG)
Mikrostrukturelle Entwicklung von EBM-gefertigtem Gamma Titanaluminide (TNM-B1)
ID: 406109547 - Version / Begutachtungsstatus
- publizierte Version / Verlagsversion
- URN Qucosa
- urn:nbn:de:bsz:14-qucosa2-1039267
- Veröffentlichungsdatum Qucosa
- 21.04.2026
- Dokumenttyp
- Artikel
- Sprache des Dokumentes
- Englisch
- Lizenz / Rechtehinweis
CC BY 4.0