Laser Directed Energy Deposition of an AlMgScZr-Alloy in High-Speed Process Regimes
Aluminum-magnesium-scandium-zirconium (AlMgScZr) alloys need to be rapidly cooled from the liquid state to obtain a high degree of solute supersaturation that helps to exploit the precipitation hardening potential of the material. While AlMgScZr alloys have been successfully used in laser powder bed...
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| Format: | Article |
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MDPI AG
2022-12-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/24/8951 |
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| author | Tong Zhao Teng Chen Yuhan Wang Mengjie Wang Maha Bakir Marius Dahmen Wangcan Cai Chen Hong Thomas Schopphoven Norbert Pirch Matthias Brucki Andres Gasser Constantin Leon Häfner |
| author_facet | Tong Zhao Teng Chen Yuhan Wang Mengjie Wang Maha Bakir Marius Dahmen Wangcan Cai Chen Hong Thomas Schopphoven Norbert Pirch Matthias Brucki Andres Gasser Constantin Leon Häfner |
| author_sort | Tong Zhao |
| collection | DOAJ |
| description | Aluminum-magnesium-scandium-zirconium (AlMgScZr) alloys need to be rapidly cooled from the liquid state to obtain a high degree of solute supersaturation that helps to exploit the precipitation hardening potential of the material. While AlMgScZr alloys have been successfully used in laser powder bed fusion (LPBF) processes, there has been little research in the field of laser directed energy deposition (DED) of the material. The limited previous studies have shown that the performance of AlMgScZr parts fabricated with DED only reached about 60% of that of the parts fabricated with LPBF. In view of breaking through the limitation associated with the process conditions of conventional DED, this work demonstrates the DED of AlMgScZr alloys in high-speed process regimes and elucidates the mechanism of enhancing the hardness and tensile strength of AlMgScZr alloys by increasing the cooling rate by one to two orders of magnitudes, as well as reducing the track overlapping and the porosity of the specimens during the process. A maximum average hardness of nearly 150 HV0.1 and a max. tensile strength of 407 MPa are obtained by using an energy per unit length of 5400 J/m and a powder feed rate per unit length of 0.25 g/m. |
| first_indexed | 2024-03-09T16:08:41Z |
| format | Article |
| id | doaj.art-0b7a64e8f577464f9132db228815b4b9 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T16:08:41Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-0b7a64e8f577464f9132db228815b4b92023-11-24T16:24:30ZengMDPI AGMaterials1996-19442022-12-011524895110.3390/ma15248951Laser Directed Energy Deposition of an AlMgScZr-Alloy in High-Speed Process RegimesTong Zhao0Teng Chen1Yuhan Wang2Mengjie Wang3Maha Bakir4Marius Dahmen5Wangcan Cai6Chen Hong7Thomas Schopphoven8Norbert Pirch9Matthias Brucki10Andres Gasser11Constantin Leon Häfner12Fraunhofer ILT—Institute for Laser Technology, Steinbachstraße 15, D-52074 Aachen, GermanyFraunhofer ILT—Institute for Laser Technology, Steinbachstraße 15, D-52074 Aachen, GermanyFraunhofer ILT—Institute for Laser Technology, Steinbachstraße 15, D-52074 Aachen, GermanyFraunhofer ILT—Institute for Laser Technology, Steinbachstraße 15, D-52074 Aachen, GermanyFraunhofer ILT—Institute for Laser Technology, Steinbachstraße 15, D-52074 Aachen, GermanyFraunhofer ILT—Institute for Laser Technology, Steinbachstraße 15, D-52074 Aachen, GermanyFraunhofer ILT—Institute for Laser Technology, Steinbachstraße 15, D-52074 Aachen, GermanyFraunhofer ILT—Institute for Laser Technology, Steinbachstraße 15, D-52074 Aachen, GermanyFraunhofer ILT—Institute for Laser Technology, Steinbachstraße 15, D-52074 Aachen, GermanyFraunhofer ILT—Institute for Laser Technology, Steinbachstraße 15, D-52074 Aachen, GermanyFraunhofer ILT—Institute for Laser Technology, Steinbachstraße 15, D-52074 Aachen, GermanyFraunhofer ILT—Institute for Laser Technology, Steinbachstraße 15, D-52074 Aachen, GermanyFraunhofer ILT—Institute for Laser Technology, Steinbachstraße 15, D-52074 Aachen, GermanyAluminum-magnesium-scandium-zirconium (AlMgScZr) alloys need to be rapidly cooled from the liquid state to obtain a high degree of solute supersaturation that helps to exploit the precipitation hardening potential of the material. While AlMgScZr alloys have been successfully used in laser powder bed fusion (LPBF) processes, there has been little research in the field of laser directed energy deposition (DED) of the material. The limited previous studies have shown that the performance of AlMgScZr parts fabricated with DED only reached about 60% of that of the parts fabricated with LPBF. In view of breaking through the limitation associated with the process conditions of conventional DED, this work demonstrates the DED of AlMgScZr alloys in high-speed process regimes and elucidates the mechanism of enhancing the hardness and tensile strength of AlMgScZr alloys by increasing the cooling rate by one to two orders of magnitudes, as well as reducing the track overlapping and the porosity of the specimens during the process. A maximum average hardness of nearly 150 HV0.1 and a max. tensile strength of 407 MPa are obtained by using an energy per unit length of 5400 J/m and a powder feed rate per unit length of 0.25 g/m.https://www.mdpi.com/1996-1944/15/24/8951aluminum magnesium scandium zirconium alloyshigh-speed directed energy deposition—EHLAcooling ratetrack overlappingporosity |
| spellingShingle | Tong Zhao Teng Chen Yuhan Wang Mengjie Wang Maha Bakir Marius Dahmen Wangcan Cai Chen Hong Thomas Schopphoven Norbert Pirch Matthias Brucki Andres Gasser Constantin Leon Häfner Laser Directed Energy Deposition of an AlMgScZr-Alloy in High-Speed Process Regimes Materials aluminum magnesium scandium zirconium alloys high-speed directed energy deposition—EHLA cooling rate track overlapping porosity |
| title | Laser Directed Energy Deposition of an AlMgScZr-Alloy in High-Speed Process Regimes |
| title_full | Laser Directed Energy Deposition of an AlMgScZr-Alloy in High-Speed Process Regimes |
| title_fullStr | Laser Directed Energy Deposition of an AlMgScZr-Alloy in High-Speed Process Regimes |
| title_full_unstemmed | Laser Directed Energy Deposition of an AlMgScZr-Alloy in High-Speed Process Regimes |
| title_short | Laser Directed Energy Deposition of an AlMgScZr-Alloy in High-Speed Process Regimes |
| title_sort | laser directed energy deposition of an almgsczr alloy in high speed process regimes |
| topic | aluminum magnesium scandium zirconium alloys high-speed directed energy deposition—EHLA cooling rate track overlapping porosity |
| url | https://www.mdpi.com/1996-1944/15/24/8951 |
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