Modeling of the Effect of the Building Strategy on the Thermomechanical Response of Ti-6Al-4V Rectangular Parts Manufactured by Laser Directed Energy Deposition
Part warpage and residual stress are two of the main challenges for metal additive manufacturing (AM) as they result in lower geometric precision and poor mechanical properties of the products. This work investigates the effect of the building strategy on the heat transfer process and the evolution...
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| Format: | Article |
| Language: | English |
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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/2075-4701/10/12/1643 |
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| author | Xufei Lu Miguel Cervera Michele Chiumenti Junjie Li Xianglin Ji Guohao Zhang Xin Lin |
| author_facet | Xufei Lu Miguel Cervera Michele Chiumenti Junjie Li Xianglin Ji Guohao Zhang Xin Lin |
| author_sort | Xufei Lu |
| collection | DOAJ |
| description | Part warpage and residual stress are two of the main challenges for metal additive manufacturing (AM) as they result in lower geometric precision and poor mechanical properties of the products. This work investigates the effect of the building strategy on the heat transfer process and the evolution of the thermally induced mechanical variables in laser directed energy deposition (L-DED) in order to minimize residual stresses and deformations. A 3D finite element (FE) thermo-mechanical model is firstly calibrated through in-situ experiments of rectangular workpieces fabricated by L-DED technology, and, secondly, the coupled thermo-mechanical responses for different process parameters and scanning patterns are discussed in detail. On the calibration stage, the remarkable agreement is achieved between predicted results and experimental data. Regarding the modeling stage, the numerical results indicate that minimization of the part warpage is achieved by reducing the back speed and shortening the scanning lines during the building process. Both residual stress and deformation can be further reduced if preheating the baseplate is added before L-DED. |
| first_indexed | 2024-03-09T06:01:44Z |
| format | Article |
| id | doaj.art-da8aefaf6f6542789faad71239c7e443 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T06:01:44Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-da8aefaf6f6542789faad71239c7e4432023-12-03T12:08:41ZengMDPI AGMetals2075-47012020-12-011012164310.3390/met10121643Modeling of the Effect of the Building Strategy on the Thermomechanical Response of Ti-6Al-4V Rectangular Parts Manufactured by Laser Directed Energy DepositionXufei Lu0Miguel Cervera1Michele Chiumenti2Junjie Li3Xianglin Ji4Guohao Zhang5Xin Lin6International Center for Numerical Methods in Engineering (CIMNE), Universidad Politécnica de Cataluña (UPC), Edificio C1, Campus Norte, Gran Capitán s/n, 08034 Barcelona, SpainInternational Center for Numerical Methods in Engineering (CIMNE), Universidad Politécnica de Cataluña (UPC), Edificio C1, Campus Norte, Gran Capitán s/n, 08034 Barcelona, SpainInternational Center for Numerical Methods in Engineering (CIMNE), Universidad Politécnica de Cataluña (UPC), Edificio C1, Campus Norte, Gran Capitán s/n, 08034 Barcelona, SpainKey Laboratory of Metal High Performance Additive Manufacturing and Innovative Design, MIIT China, Northwestern Polytechnical University, Youyixilu, Xi’an 710072, ChinaDepartment of Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR 999077, ChinaKey Laboratory of Metal High Performance Additive Manufacturing and Innovative Design, MIIT China, Northwestern Polytechnical University, Youyixilu, Xi’an 710072, ChinaKey Laboratory of Metal High Performance Additive Manufacturing and Innovative Design, MIIT China, Northwestern Polytechnical University, Youyixilu, Xi’an 710072, ChinaPart warpage and residual stress are two of the main challenges for metal additive manufacturing (AM) as they result in lower geometric precision and poor mechanical properties of the products. This work investigates the effect of the building strategy on the heat transfer process and the evolution of the thermally induced mechanical variables in laser directed energy deposition (L-DED) in order to minimize residual stresses and deformations. A 3D finite element (FE) thermo-mechanical model is firstly calibrated through in-situ experiments of rectangular workpieces fabricated by L-DED technology, and, secondly, the coupled thermo-mechanical responses for different process parameters and scanning patterns are discussed in detail. On the calibration stage, the remarkable agreement is achieved between predicted results and experimental data. Regarding the modeling stage, the numerical results indicate that minimization of the part warpage is achieved by reducing the back speed and shortening the scanning lines during the building process. Both residual stress and deformation can be further reduced if preheating the baseplate is added before L-DED.https://www.mdpi.com/2075-4701/10/12/1643laser directed energy deposition (L-DED)thermo-mechanical simulationprocess parametersscanning patternpart warpageresidual stress |
| spellingShingle | Xufei Lu Miguel Cervera Michele Chiumenti Junjie Li Xianglin Ji Guohao Zhang Xin Lin Modeling of the Effect of the Building Strategy on the Thermomechanical Response of Ti-6Al-4V Rectangular Parts Manufactured by Laser Directed Energy Deposition Metals laser directed energy deposition (L-DED) thermo-mechanical simulation process parameters scanning pattern part warpage residual stress |
| title | Modeling of the Effect of the Building Strategy on the Thermomechanical Response of Ti-6Al-4V Rectangular Parts Manufactured by Laser Directed Energy Deposition |
| title_full | Modeling of the Effect of the Building Strategy on the Thermomechanical Response of Ti-6Al-4V Rectangular Parts Manufactured by Laser Directed Energy Deposition |
| title_fullStr | Modeling of the Effect of the Building Strategy on the Thermomechanical Response of Ti-6Al-4V Rectangular Parts Manufactured by Laser Directed Energy Deposition |
| title_full_unstemmed | Modeling of the Effect of the Building Strategy on the Thermomechanical Response of Ti-6Al-4V Rectangular Parts Manufactured by Laser Directed Energy Deposition |
| title_short | Modeling of the Effect of the Building Strategy on the Thermomechanical Response of Ti-6Al-4V Rectangular Parts Manufactured by Laser Directed Energy Deposition |
| title_sort | modeling of the effect of the building strategy on the thermomechanical response of ti 6al 4v rectangular parts manufactured by laser directed energy deposition |
| topic | laser directed energy deposition (L-DED) thermo-mechanical simulation process parameters scanning pattern part warpage residual stress |
| url | https://www.mdpi.com/2075-4701/10/12/1643 |
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