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http://dx.doi.org/10.18419/opus-13749
Autor(en): | Megahed, Sandra Krämer, Karl Michael Kontermann, Christian Heinze, Christoph Udoh, Annett Weihe, Stefan Oechsner, Matthias |
Titel: | Micro-twinning in IN738LC manufactured with laser powder bed fusion |
Erscheinungsdatum: | 2023 |
Dokumentart: | Zeitschriftenartikel |
Seiten: | 16 |
Erschienen in: | Materials 16 (2023), No. 5918 |
URI: | http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-137683 http://elib.uni-stuttgart.de/handle/11682/13768 http://dx.doi.org/10.18419/opus-13749 |
ISSN: | 1996-1944 |
Zusammenfassung: | Components manufactured with Metal Laser Powder Bed Fusion (PBF-LB/M) are built in a layerwise fashion. The PBF-LB/M build orientation affects grain morphology and orientation. Depending on the build orientation, microstructures from equiaxed to textured grains can develop. In the case of a textured microstructure, a clear anisotropy of the mechanical properties affecting short- and long-term mechanical properties can be observed, which must be considered in the component design. Within the scope of this study, the IN738LC tensile and creep properties of PBF-LB/M samples manufactured in 0° (perpendicular to build direction), 45° and 90° (parallel to build direction) build orientations were investigated. While the hot tensile results (at 850 °C) are as expected, where the tensile properties of the 45° build orientation lay between those of 0° and 90°, the creep results (performed at 850 °C and 200 MPa) of the 45° build orientation show the least time to rupture. This study discusses the microstructural reasoning behind the peculiar creep behavior of 45° oriented IN738LC samples and correlates the results to heat-treated microstructures and the solidification conditions of the PBF-LB/M process itself. |
Enthalten in den Sammlungen: | 13 Zentrale Universitätseinrichtungen |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | |
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materials-16-05918-v2.pdf | 6,38 MB | Adobe PDF | Öffnen/Anzeigen |
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