Megahed, Sandra ; Krämer, Karl Michael ; Kontermann, Christian ; Heinze, Christoph ; Udoh, Annett ; Weihe, Stefan ; Oechsner, Matthias (2023)
Micro-Twinning in IN738LC Manufactured with Laser Powder Bed Fusion.
In: Materials, 16 (17)
doi: 10.3390/ma16175918
Article, Bibliographie
This is the latest version of this item.
Abstract
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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2023 |
| Creators: | Megahed, Sandra ; Krämer, Karl Michael ; Kontermann, Christian ; Heinze, Christoph ; Udoh, Annett ; Weihe, Stefan ; Oechsner, Matthias |
| Type of entry: | Bibliographie |
| Title: | Micro-Twinning in IN738LC Manufactured with Laser Powder Bed Fusion |
| Language: | English |
| Date: | 2023 |
| Place of Publication: | Darmstadt |
| Publisher: | MDPI |
| Journal or Publication Title: | Materials |
| Volume of the journal: | 16 |
| Issue Number: | 17 |
| Collation: | 16 Seiten |
| DOI: | 10.3390/ma16175918 |
| Corresponding Links: | |
| Abstract: | 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. |
| Uncontrolled Keywords: | laser powder bed fusion, IN738LC, microstructure, creep, micro-twinning |
| Classification DDC: | 600 Technology, medicine, applied sciences > 620 Engineering and machine engineering |
| Divisions: | 16 Department of Mechanical Engineering 16 Department of Mechanical Engineering > Center for Engineering Materials, State Materials Testing Institute Darmstadt (MPA) Chair and Institute for Materials Technology (IfW) |
| Date Deposited: | 02 Aug 2024 12:55 |
| Last Modified: | 02 Aug 2024 12:55 |
| PPN: | |
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| Suche nach Titel in: | TUfind oder in Google |
Available Versions of this Item
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Micro-Twinning in IN738LC Manufactured with Laser Powder Bed Fusion. (deposited 11 Sep 2023 12:20)
- Micro-Twinning in IN738LC Manufactured with Laser Powder Bed Fusion. (deposited 02 Aug 2024 12:55) [Currently Displayed]
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