Local Remelting in Laser Powder Bed Fusion
In Laser Powder Bed Fusion, process material defects such as a lack of fusion, powder inclusions and cavities occur repeatedly by chance. These stochastically distributed defects can significantly reduce the mechanical performance of the components during operation. Possible in situ repair solutions...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-12-01
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| Series: | Journal of Manufacturing and Materials Processing |
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| Online Access: | https://www.mdpi.com/2504-4494/8/6/281 |
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| author | Janno Lehmann Martin Weise Markus Köhler Frank von Lacroix Vasily Ploshikhin Klaus Dilger |
| author_facet | Janno Lehmann Martin Weise Markus Köhler Frank von Lacroix Vasily Ploshikhin Klaus Dilger |
| author_sort | Janno Lehmann |
| collection | DOAJ |
| description | In Laser Powder Bed Fusion, process material defects such as a lack of fusion, powder inclusions and cavities occur repeatedly by chance. These stochastically distributed defects can significantly reduce the mechanical performance of the components during operation. Possible in situ repair solutions such as multiple remelting of specific layer areas are promising approaches to avoid these defects in the finished component, thus improving the overall properties. In this context, the present study investigates the remelting of artificially introduced defects using the example of M789 tool steel. In the first step, the process parameter settings and mechanical properties were evaluated using a tensile test, and the density of the local repair was examined using X-ray computer tomography and a metallographic analysis. The results demonstrate that the mechanical properties of the tensile test are comparable with those of the reference samples while successfully increasing the component quality. This indicates that defects that arise during the process can be remelted without the loss of mechanical characteristics. |
| format | Article |
| id | doaj-art-6d2d3bf845e14fd08dd93645c5f0e400 |
| institution | DOAJ |
| issn | 2504-4494 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Manufacturing and Materials Processing |
| spelling | doaj-art-6d2d3bf845e14fd08dd93645c5f0e4002025-08-20T02:53:26ZengMDPI AGJournal of Manufacturing and Materials Processing2504-44942024-12-018628110.3390/jmmp8060281Local Remelting in Laser Powder Bed FusionJanno Lehmann0Martin Weise1Markus Köhler2Frank von Lacroix3Vasily Ploshikhin4Klaus Dilger5Volkswagen AG, Braunschweig, Berliner Ring 2, 38440 Wolfsburg, GermanyInstitute of Joining and Welding, Technische Universität Braunschweig, Langer Kamp 8, 38106 Braunschweig, GermanyInstitute of Joining and Welding, Technische Universität Braunschweig, Langer Kamp 8, 38106 Braunschweig, GermanyVolkswagen AG, Braunschweig, Berliner Ring 2, 38440 Wolfsburg, GermanyAirbus Endowed Chair for Integrative Simulation and Engineering of Materials and Processes, University of Bremen, Am Fallturm 1, TAB, 28359 Bremen, GermanyInstitute of Joining and Welding, Technische Universität Braunschweig, Langer Kamp 8, 38106 Braunschweig, GermanyIn Laser Powder Bed Fusion, process material defects such as a lack of fusion, powder inclusions and cavities occur repeatedly by chance. These stochastically distributed defects can significantly reduce the mechanical performance of the components during operation. Possible in situ repair solutions such as multiple remelting of specific layer areas are promising approaches to avoid these defects in the finished component, thus improving the overall properties. In this context, the present study investigates the remelting of artificially introduced defects using the example of M789 tool steel. In the first step, the process parameter settings and mechanical properties were evaluated using a tensile test, and the density of the local repair was examined using X-ray computer tomography and a metallographic analysis. The results demonstrate that the mechanical properties of the tensile test are comparable with those of the reference samples while successfully increasing the component quality. This indicates that defects that arise during the process can be remelted without the loss of mechanical characteristics.https://www.mdpi.com/2504-4494/8/6/281remeltingPBF-LBdefectsrepairtensile testX-ray computer tomography |
| spellingShingle | Janno Lehmann Martin Weise Markus Köhler Frank von Lacroix Vasily Ploshikhin Klaus Dilger Local Remelting in Laser Powder Bed Fusion Journal of Manufacturing and Materials Processing remelting PBF-LB defects repair tensile test X-ray computer tomography |
| title | Local Remelting in Laser Powder Bed Fusion |
| title_full | Local Remelting in Laser Powder Bed Fusion |
| title_fullStr | Local Remelting in Laser Powder Bed Fusion |
| title_full_unstemmed | Local Remelting in Laser Powder Bed Fusion |
| title_short | Local Remelting in Laser Powder Bed Fusion |
| title_sort | local remelting in laser powder bed fusion |
| topic | remelting PBF-LB defects repair tensile test X-ray computer tomography |
| url | https://www.mdpi.com/2504-4494/8/6/281 |
| work_keys_str_mv | AT jannolehmann localremeltinginlaserpowderbedfusion AT martinweise localremeltinginlaserpowderbedfusion AT markuskohler localremeltinginlaserpowderbedfusion AT frankvonlacroix localremeltinginlaserpowderbedfusion AT vasilyploshikhin localremeltinginlaserpowderbedfusion AT klausdilger localremeltinginlaserpowderbedfusion |