Coaxial laser metal wire deposition of Ti6Al4V alloy: process, microstructure and mechanical properties
Wire-based additive manufacturing (AM) shows a promising prospect in fabricating large-scale titanium aerospace components at a high deposition rate and low cost. The currently used wire-based AM processes commonly utilize a lateral feeding method with an acute angle to form a deposit, which reduces...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-09-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422013011 |
| _version_ | 1811199481226461184 |
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| author | Yuan Chen Xi Chen Meng Jiang Zhenglong Lei Zhe Wang Jingwei Liang Shibo Wu Shengchong Ma Nan Jiang Yanbin Chen |
| author_facet | Yuan Chen Xi Chen Meng Jiang Zhenglong Lei Zhe Wang Jingwei Liang Shibo Wu Shengchong Ma Nan Jiang Yanbin Chen |
| author_sort | Yuan Chen |
| collection | DOAJ |
| description | Wire-based additive manufacturing (AM) shows a promising prospect in fabricating large-scale titanium aerospace components at a high deposition rate and low cost. The currently used wire-based AM processes commonly utilize a lateral feeding method with an acute angle to form a deposit, which reduces the flexibility and increases the difficulty of control in making complex components. In this work, a novel coaxial laser metal wire deposition (LMWD) process was used to fabricate the most widely used titanium alloy, Ti6Al4V. The coaxial wire feeding was achieved by a coaxial laser head through a vertically fed wire surrounded by an annular shape beam at focal plane. The surface quality, microstructure and mechanical properties of the deposited Ti6Al4V were examined. To show the characteristic of the coaxial LMWD process, conventional lateral LMWD was also conducted for comparison. The deposited Ti6Al4V wall showed a high surface quality and a microstructure with a mix of equiaxed β grains and columnar prior-β grains rather than coarse prior-β grains. The refined microstructure resulted in a low anisotropy in mechanical properties. The mechanism of the equiaxed β grains formation was also discussed. The combined effect of the reduced thermal gradient and the heterogeneous nucleation from the coaxial wire feeding played an important role in determining the refined microstructures in coaxial LMWD. |
| first_indexed | 2024-04-12T01:48:55Z |
| format | Article |
| id | doaj.art-f50de4bf98aa409ba7315ee3f4b56b29 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-12T01:48:55Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-f50de4bf98aa409ba7315ee3f4b56b292022-12-22T03:53:00ZengElsevierJournal of Materials Research and Technology2238-78542022-09-012025782590Coaxial laser metal wire deposition of Ti6Al4V alloy: process, microstructure and mechanical propertiesYuan Chen0Xi Chen1Meng Jiang2Zhenglong Lei3Zhe Wang4Jingwei Liang5Shibo Wu6Shengchong Ma7Nan Jiang8Yanbin Chen9State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, ChinaCorresponding author.; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, ChinaCorresponding author.; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, ChinaCorresponding author.; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, ChinaState Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, ChinaState Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, ChinaState Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, ChinaState Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, ChinaState Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, ChinaState Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, ChinaWire-based additive manufacturing (AM) shows a promising prospect in fabricating large-scale titanium aerospace components at a high deposition rate and low cost. The currently used wire-based AM processes commonly utilize a lateral feeding method with an acute angle to form a deposit, which reduces the flexibility and increases the difficulty of control in making complex components. In this work, a novel coaxial laser metal wire deposition (LMWD) process was used to fabricate the most widely used titanium alloy, Ti6Al4V. The coaxial wire feeding was achieved by a coaxial laser head through a vertically fed wire surrounded by an annular shape beam at focal plane. The surface quality, microstructure and mechanical properties of the deposited Ti6Al4V were examined. To show the characteristic of the coaxial LMWD process, conventional lateral LMWD was also conducted for comparison. The deposited Ti6Al4V wall showed a high surface quality and a microstructure with a mix of equiaxed β grains and columnar prior-β grains rather than coarse prior-β grains. The refined microstructure resulted in a low anisotropy in mechanical properties. The mechanism of the equiaxed β grains formation was also discussed. The combined effect of the reduced thermal gradient and the heterogeneous nucleation from the coaxial wire feeding played an important role in determining the refined microstructures in coaxial LMWD.http://www.sciencedirect.com/science/article/pii/S2238785422013011Coaxial laser focusLaser metal depositionTi6Al4VTensile anisotropy |
| spellingShingle | Yuan Chen Xi Chen Meng Jiang Zhenglong Lei Zhe Wang Jingwei Liang Shibo Wu Shengchong Ma Nan Jiang Yanbin Chen Coaxial laser metal wire deposition of Ti6Al4V alloy: process, microstructure and mechanical properties Journal of Materials Research and Technology Coaxial laser focus Laser metal deposition Ti6Al4V Tensile anisotropy |
| title | Coaxial laser metal wire deposition of Ti6Al4V alloy: process, microstructure and mechanical properties |
| title_full | Coaxial laser metal wire deposition of Ti6Al4V alloy: process, microstructure and mechanical properties |
| title_fullStr | Coaxial laser metal wire deposition of Ti6Al4V alloy: process, microstructure and mechanical properties |
| title_full_unstemmed | Coaxial laser metal wire deposition of Ti6Al4V alloy: process, microstructure and mechanical properties |
| title_short | Coaxial laser metal wire deposition of Ti6Al4V alloy: process, microstructure and mechanical properties |
| title_sort | coaxial laser metal wire deposition of ti6al4v alloy process microstructure and mechanical properties |
| topic | Coaxial laser focus Laser metal deposition Ti6Al4V Tensile anisotropy |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422013011 |
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