Development of a Novel High-Temperature Al Alloy for Laser Powder Bed Fusion
The number of available materials for Laser Powder Bed Fusion is still limited due to the poor processability of many standard alloys. In particular, the lack of high-strength aluminium alloys, widely used in aerospace and automotive industries, remains a big issue for the spread of beam-based addit...
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| Format: | Article |
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MDPI AG
2020-12-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/1/35 |
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| author | Filippo Belelli Riccardo Casati Martina Riccio Alessandro Rizzi Mevlüt Y. Kayacan Maurizio Vedani |
| author_facet | Filippo Belelli Riccardo Casati Martina Riccio Alessandro Rizzi Mevlüt Y. Kayacan Maurizio Vedani |
| author_sort | Filippo Belelli |
| collection | DOAJ |
| description | The number of available materials for Laser Powder Bed Fusion is still limited due to the poor processability of many standard alloys. In particular, the lack of high-strength aluminium alloys, widely used in aerospace and automotive industries, remains a big issue for the spread of beam-based additive manufacturing technologies. In this study, a novel high-strength aluminium alloy for high temperature applications having good processability was developed. The design of the alloy was done based on the chemical composition of the widely used EN AW 2618. This Al-Cu-Mg-Ni-Fe alloy was modified with Ti and B in order to promote the formation of TiB<sub>2</sub> nuclei in the liquid phase able to stimulate heterogeneous nucleation of grains and to decrease the hot cracking susceptibility of the material. The new Al alloy was manufactured by gas atomisation and processed by Laser Powder Bed Fusion. Samples produced with optimised parameters featured relative density of 99.91%, with no solidification cracks within their microstructure. After aging, the material revealed upper yield strength and ultimate tensile strength of 495 MPa and 460 MPa, respectively. In addition, the alloy showed tensile strength higher than wrought EN AW 2618 at elevated temperatures. |
| first_indexed | 2024-03-10T13:45:58Z |
| format | Article |
| id | doaj.art-e3b30482e6174255874bd00b020e9343 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T13:45:58Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-e3b30482e6174255874bd00b020e93432023-11-21T02:40:21ZengMDPI AGMetals2075-47012020-12-011113510.3390/met11010035Development of a Novel High-Temperature Al Alloy for Laser Powder Bed FusionFilippo Belelli0Riccardo Casati1Martina Riccio2Alessandro Rizzi3Mevlüt Y. Kayacan4Maurizio Vedani5Department of Mechanical Engineering, Politecnico di Milano, Via G. La Masa 1, 20156 Milano, ItalyDepartment of Mechanical Engineering, Politecnico di Milano, Via G. La Masa 1, 20156 Milano, ItalyBeam-IT, Strada Prinzera, 17, 43045 Fornovo di Taro (PR), ItalyBeam-IT, Strada Prinzera, 17, 43045 Fornovo di Taro (PR), ItalyDepartment of Mechanical Engineering, Politecnico di Milano, Via G. La Masa 1, 20156 Milano, ItalyDepartment of Mechanical Engineering, Politecnico di Milano, Via G. La Masa 1, 20156 Milano, ItalyThe number of available materials for Laser Powder Bed Fusion is still limited due to the poor processability of many standard alloys. In particular, the lack of high-strength aluminium alloys, widely used in aerospace and automotive industries, remains a big issue for the spread of beam-based additive manufacturing technologies. In this study, a novel high-strength aluminium alloy for high temperature applications having good processability was developed. The design of the alloy was done based on the chemical composition of the widely used EN AW 2618. This Al-Cu-Mg-Ni-Fe alloy was modified with Ti and B in order to promote the formation of TiB<sub>2</sub> nuclei in the liquid phase able to stimulate heterogeneous nucleation of grains and to decrease the hot cracking susceptibility of the material. The new Al alloy was manufactured by gas atomisation and processed by Laser Powder Bed Fusion. Samples produced with optimised parameters featured relative density of 99.91%, with no solidification cracks within their microstructure. After aging, the material revealed upper yield strength and ultimate tensile strength of 495 MPa and 460 MPa, respectively. In addition, the alloy showed tensile strength higher than wrought EN AW 2618 at elevated temperatures.https://www.mdpi.com/2075-4701/11/1/35additive manufacturinglaser powder bed fusionaluminium alloyshigh temperature applicationsaging |
| spellingShingle | Filippo Belelli Riccardo Casati Martina Riccio Alessandro Rizzi Mevlüt Y. Kayacan Maurizio Vedani Development of a Novel High-Temperature Al Alloy for Laser Powder Bed Fusion Metals additive manufacturing laser powder bed fusion aluminium alloys high temperature applications aging |
| title | Development of a Novel High-Temperature Al Alloy for Laser Powder Bed Fusion |
| title_full | Development of a Novel High-Temperature Al Alloy for Laser Powder Bed Fusion |
| title_fullStr | Development of a Novel High-Temperature Al Alloy for Laser Powder Bed Fusion |
| title_full_unstemmed | Development of a Novel High-Temperature Al Alloy for Laser Powder Bed Fusion |
| title_short | Development of a Novel High-Temperature Al Alloy for Laser Powder Bed Fusion |
| title_sort | development of a novel high temperature al alloy for laser powder bed fusion |
| topic | additive manufacturing laser powder bed fusion aluminium alloys high temperature applications aging |
| url | https://www.mdpi.com/2075-4701/11/1/35 |
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