Effect of static magnetic field on microstructure and mechanical property of AlSi10Mg alloy by laser directed energy deposition
Laser directed energy deposition (LDED) is one of the popular metal additive manufacturing techniques. However, owing to the steep temperature gradient in melt pool, its as-built part is featured by coarse columnar crystal structures which is detrimental for the mechanical properties. This work uses...
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2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| author | Weiming Niu Bingke Song Jiasen Han Haiou Yang Zhaopu Yao Hui Chen Xin Lin |
| author_facet | Weiming Niu Bingke Song Jiasen Han Haiou Yang Zhaopu Yao Hui Chen Xin Lin |
| author_sort | Weiming Niu |
| collection | DOAJ |
| description | Laser directed energy deposition (LDED) is one of the popular metal additive manufacturing techniques. However, owing to the steep temperature gradient in melt pool, its as-built part is featured by coarse columnar crystal structures which is detrimental for the mechanical properties. This work uses an infrared laser with a wavelength of 960 nm to conduct the LDED process of AlSi10Mg alloy, where magnetic field with various intensities is employed to tailor the macroscopic morphology, microstructure and mechanical properties of the processed sample. The results show that with the static magnetic field, the melted single track becomes narrower and higher with a corresponding larger wetting angle, changing the stability and quality of layer-by-layer deposition. This can be attributed to the weakened outward Marangoni melt pool flow by the magnetic damping effect. When the magnetic field intensity goes from 0 to 0.2 T, the average grain size decreases from 58.1 μm to 44.1 μm. The magnetic field is effective in refining grain structures and promoting the columnar-to-equiaxed transition of LDED process, while its influence on fusion defects of pores is not remarkable. Due to the thermoelectric-magnetic effect, the volume force imposed on the dendrite is sufficient to fracture the dendrite arm and then reduce the dendrite spacing. In addition, the magnetic field can increase the elongation of AlSi10Mg alloy from 3.5 ± 0.2% to 5.5 ± 0.2% because of the refinement of the grains and the primary dendrite arm spacing. The study provides new insights into the potential of using magnetic field during LDED process to improve the microstructure and mechanical property of AlSi10Mg alloy. |
| format | Article |
| id | doaj-art-75de57db74b34690bdaee9203d7fb7f0 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-75de57db74b34690bdaee9203d7fb7f02025-01-19T06:25:55ZengElsevierJournal of Materials Research and Technology2238-78542025-01-013423922402Effect of static magnetic field on microstructure and mechanical property of AlSi10Mg alloy by laser directed energy depositionWeiming Niu0Bingke Song1Jiasen Han2Haiou Yang3Zhaopu Yao4Hui Chen5Xin Lin6State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, People's Republic of China; MIIT Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, People's Republic of ChinaShanghai Institute of Spacecraft Equipment, Shanghai Academic of Spaceflight Technology, Shanghai, 200240, People's Republic of ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, People's Republic of China; MIIT Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, People's Republic of ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, People's Republic of China; MIIT Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, People's Republic of ChinaBeijing Institute of Control Engineering, Beijing, 100190, People's Republic of ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, People's Republic of China; MIIT Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, People's Republic of China; Corresponding author. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, People's Republic of China.State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, People's Republic of China; MIIT Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, People's Republic of China; Corresponding author. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, Shaanxi, People's Republic of China.Laser directed energy deposition (LDED) is one of the popular metal additive manufacturing techniques. However, owing to the steep temperature gradient in melt pool, its as-built part is featured by coarse columnar crystal structures which is detrimental for the mechanical properties. This work uses an infrared laser with a wavelength of 960 nm to conduct the LDED process of AlSi10Mg alloy, where magnetic field with various intensities is employed to tailor the macroscopic morphology, microstructure and mechanical properties of the processed sample. The results show that with the static magnetic field, the melted single track becomes narrower and higher with a corresponding larger wetting angle, changing the stability and quality of layer-by-layer deposition. This can be attributed to the weakened outward Marangoni melt pool flow by the magnetic damping effect. When the magnetic field intensity goes from 0 to 0.2 T, the average grain size decreases from 58.1 μm to 44.1 μm. The magnetic field is effective in refining grain structures and promoting the columnar-to-equiaxed transition of LDED process, while its influence on fusion defects of pores is not remarkable. Due to the thermoelectric-magnetic effect, the volume force imposed on the dendrite is sufficient to fracture the dendrite arm and then reduce the dendrite spacing. In addition, the magnetic field can increase the elongation of AlSi10Mg alloy from 3.5 ± 0.2% to 5.5 ± 0.2% because of the refinement of the grains and the primary dendrite arm spacing. The study provides new insights into the potential of using magnetic field during LDED process to improve the microstructure and mechanical property of AlSi10Mg alloy.http://www.sciencedirect.com/science/article/pii/S2238785424030394Laser directed energy depositionStatic magnetic fieldMicrostructureMechanical propertyAdditive manufacturing |
| spellingShingle | Weiming Niu Bingke Song Jiasen Han Haiou Yang Zhaopu Yao Hui Chen Xin Lin Effect of static magnetic field on microstructure and mechanical property of AlSi10Mg alloy by laser directed energy deposition Journal of Materials Research and Technology Laser directed energy deposition Static magnetic field Microstructure Mechanical property Additive manufacturing |
| title | Effect of static magnetic field on microstructure and mechanical property of AlSi10Mg alloy by laser directed energy deposition |
| title_full | Effect of static magnetic field on microstructure and mechanical property of AlSi10Mg alloy by laser directed energy deposition |
| title_fullStr | Effect of static magnetic field on microstructure and mechanical property of AlSi10Mg alloy by laser directed energy deposition |
| title_full_unstemmed | Effect of static magnetic field on microstructure and mechanical property of AlSi10Mg alloy by laser directed energy deposition |
| title_short | Effect of static magnetic field on microstructure and mechanical property of AlSi10Mg alloy by laser directed energy deposition |
| title_sort | effect of static magnetic field on microstructure and mechanical property of alsi10mg alloy by laser directed energy deposition |
| topic | Laser directed energy deposition Static magnetic field Microstructure Mechanical property Additive manufacturing |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424030394 |
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