Fabrication of Single Crystals through a µ-Helix Grain Selection Process during Electron Beam Metal Additive Manufacturing
Selective Electron Beam Melting (SEBM) is a powder bed-based additive manufacturing process for metals. As the electron beam can be moved inertia-free by electromagnetic lenses, the solidification conditions can be deliberately adjusted within the process. This enables control over the local solidif...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-02-01
|
| Series: | Metals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4701/10/3/313 |
| _version_ | 1818574953065218048 |
|---|---|
| author | Martin R. Gotterbarm Alexander M. Rausch Carolin Körner |
| author_facet | Martin R. Gotterbarm Alexander M. Rausch Carolin Körner |
| author_sort | Martin R. Gotterbarm |
| collection | DOAJ |
| description | Selective Electron Beam Melting (SEBM) is a powder bed-based additive manufacturing process for metals. As the electron beam can be moved inertia-free by electromagnetic lenses, the solidification conditions can be deliberately adjusted within the process. This enables control over the local solidification conditions. SEBM typically leads to columnar grain structures. Based on numerical simulation, we demonstrated how technical single crystals develop in IN718 by forcing the temperature gradient along a µ-Helix. The slope of the µ-Helix, i.e., the deviation of the thermal gradient from the build direction, determined the effectiveness of grain selection right up to single crystals. |
| first_indexed | 2024-12-15T00:33:31Z |
| format | Article |
| id | doaj.art-4e106c172b644d7dbb26e04814ce64da |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-15T00:33:31Z |
| publishDate | 2020-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-4e106c172b644d7dbb26e04814ce64da2022-12-21T22:41:52ZengMDPI AGMetals2075-47012020-02-0110331310.3390/met10030313met10030313Fabrication of Single Crystals through a µ-Helix Grain Selection Process during Electron Beam Metal Additive ManufacturingMartin R. Gotterbarm0Alexander M. Rausch1Carolin Körner2Joint Institute of Advanced Materials and Processes, University of Erlangen-Nürnberg, Dr.-Mack-Str. 81, 90762 Fürth, GermanyChair of Materials Science and Engineering for Metals, University of Erlangen-Nürnberg, Martensstr. 5, 91058 Erlangen, GermanyJoint Institute of Advanced Materials and Processes, University of Erlangen-Nürnberg, Dr.-Mack-Str. 81, 90762 Fürth, GermanySelective Electron Beam Melting (SEBM) is a powder bed-based additive manufacturing process for metals. As the electron beam can be moved inertia-free by electromagnetic lenses, the solidification conditions can be deliberately adjusted within the process. This enables control over the local solidification conditions. SEBM typically leads to columnar grain structures. Based on numerical simulation, we demonstrated how technical single crystals develop in IN718 by forcing the temperature gradient along a µ-Helix. The slope of the µ-Helix, i.e., the deviation of the thermal gradient from the build direction, determined the effectiveness of grain selection right up to single crystals.https://www.mdpi.com/2075-4701/10/3/313additive manufacturing, powder bed fusion, single crystal, grain selection |
| spellingShingle | Martin R. Gotterbarm Alexander M. Rausch Carolin Körner Fabrication of Single Crystals through a µ-Helix Grain Selection Process during Electron Beam Metal Additive Manufacturing Metals additive manufacturing, powder bed fusion, single crystal, grain selection |
| title | Fabrication of Single Crystals through a µ-Helix Grain Selection Process during Electron Beam Metal Additive Manufacturing |
| title_full | Fabrication of Single Crystals through a µ-Helix Grain Selection Process during Electron Beam Metal Additive Manufacturing |
| title_fullStr | Fabrication of Single Crystals through a µ-Helix Grain Selection Process during Electron Beam Metal Additive Manufacturing |
| title_full_unstemmed | Fabrication of Single Crystals through a µ-Helix Grain Selection Process during Electron Beam Metal Additive Manufacturing |
| title_short | Fabrication of Single Crystals through a µ-Helix Grain Selection Process during Electron Beam Metal Additive Manufacturing |
| title_sort | fabrication of single crystals through a µ helix grain selection process during electron beam metal additive manufacturing |
| topic | additive manufacturing, powder bed fusion, single crystal, grain selection |
| url | https://www.mdpi.com/2075-4701/10/3/313 |
| work_keys_str_mv | AT martinrgotterbarm fabricationofsinglecrystalsthroughaμhelixgrainselectionprocessduringelectronbeammetaladditivemanufacturing AT alexandermrausch fabricationofsinglecrystalsthroughaμhelixgrainselectionprocessduringelectronbeammetaladditivemanufacturing AT carolinkorner fabricationofsinglecrystalsthroughaμhelixgrainselectionprocessduringelectronbeammetaladditivemanufacturing |