Effects of electrolytes on electrochemical behaviour and performance of Ti6Al4V alloy prepared by laser directed energy deposition
This study investigates the influence of electrolytes on the electrochemical (EC) performance of Ti6Al4V alloy fabricated via laser directed energy deposition (LDED). The EC dissolution efficiencies and surface roughnesses of the alloy are assessed, and the surface passivation films are analyzed thr...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S223878542500122X |
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| author | Jun Yu Linzeng Wang Guoqiang Kang Xin Lin Lijun Tian Pengfei Guo Liangyi Wu Weidong Huang |
| author_facet | Jun Yu Linzeng Wang Guoqiang Kang Xin Lin Lijun Tian Pengfei Guo Liangyi Wu Weidong Huang |
| author_sort | Jun Yu |
| collection | DOAJ |
| description | This study investigates the influence of electrolytes on the electrochemical (EC) performance of Ti6Al4V alloy fabricated via laser directed energy deposition (LDED). The EC dissolution efficiencies and surface roughnesses of the alloy are assessed, and the surface passivation films are analyzed through impedances, vacancy concentrations, compositions, and nanostructures. The results demonstrate that the NaCl + EDTA-2Na electrolyte attains a moderate EC machining efficiency and the optimal surface roughness of 0.31 μm at its best performance. Transmission electron microscopy reveals distinct dissolution variations between the α and β phases during ECM. The average film thickness on the α-phase is approximately 400 nm in NaCl + NaNO3 electrolyte, 35 nm in NaCl + EDTA-2Na electrolyte, and merely 10 nm in NaCl + NaBr electrolyte. Furthermore, the anionic effects on transpassive dissolution in different electrolytes are illustrated based on the point defect model. These findings reveal that, when compared to the NaCl + NaBr electrolyte, the average ECM efficiency in NaCl + EDTA-2Na drops by 4.3%, whereas the surface roughness experiences a significant reduction of 76.3%. Especially, the dissolution difference between α and β phases can be suppressed in NaCl + EDTA-2Na electrolyte. These insights can guide the selection of electrolytes for efficient and precise ECM of LDED-prepared dual-phase titanium alloy in industrial applications. |
| format | Article |
| id | doaj-art-86aafa9c651542dcaf29e3da6af67e14 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-86aafa9c651542dcaf29e3da6af67e142025-01-26T05:03:55ZengElsevierJournal of Materials Research and Technology2238-78542025-03-013519131925Effects of electrolytes on electrochemical behaviour and performance of Ti6Al4V alloy prepared by laser directed energy depositionJun Yu0Linzeng Wang1Guoqiang Kang2Xin Lin3Lijun Tian4Pengfei Guo5Liangyi Wu6Weidong Huang7State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’ an, 710072, People's Republic of China; Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design, MIIT China, Northwestern Polytechnical University, Xi’ an, 710072, People's Republic of China; Corresponding author. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’ an, 710072, People's Republic of China.State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’ an, 710072, People's Republic of China; Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design, MIIT China, Northwestern Polytechnical University, Xi’ an, 710072, People's Republic of ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’ an, 710072, People's Republic of China; Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design, MIIT China, Northwestern Polytechnical University, Xi’ an, 710072, People's Republic of ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’ an, 710072, People's Republic of China; Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design, MIIT China, Northwestern Polytechnical University, Xi’ an, 710072, People's Republic of China; Corresponding author. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’ an, 710072, People's Republic of China.State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’ an, 710072, People's Republic of China; Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design, MIIT China, Northwestern Polytechnical University, Xi’ an, 710072, People's Republic of ChinaDepartment of Engineering Sciences and Mathematics, Luleå University of Technology, 97187, Luleå, SwedenState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’ an, 710072, People's Republic of China; Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design, MIIT China, Northwestern Polytechnical University, Xi’ an, 710072, People's Republic of ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’ an, 710072, People's Republic of China; Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design, MIIT China, Northwestern Polytechnical University, Xi’ an, 710072, People's Republic of ChinaThis study investigates the influence of electrolytes on the electrochemical (EC) performance of Ti6Al4V alloy fabricated via laser directed energy deposition (LDED). The EC dissolution efficiencies and surface roughnesses of the alloy are assessed, and the surface passivation films are analyzed through impedances, vacancy concentrations, compositions, and nanostructures. The results demonstrate that the NaCl + EDTA-2Na electrolyte attains a moderate EC machining efficiency and the optimal surface roughness of 0.31 μm at its best performance. Transmission electron microscopy reveals distinct dissolution variations between the α and β phases during ECM. The average film thickness on the α-phase is approximately 400 nm in NaCl + NaNO3 electrolyte, 35 nm in NaCl + EDTA-2Na electrolyte, and merely 10 nm in NaCl + NaBr electrolyte. Furthermore, the anionic effects on transpassive dissolution in different electrolytes are illustrated based on the point defect model. These findings reveal that, when compared to the NaCl + NaBr electrolyte, the average ECM efficiency in NaCl + EDTA-2Na drops by 4.3%, whereas the surface roughness experiences a significant reduction of 76.3%. Especially, the dissolution difference between α and β phases can be suppressed in NaCl + EDTA-2Na electrolyte. These insights can guide the selection of electrolytes for efficient and precise ECM of LDED-prepared dual-phase titanium alloy in industrial applications.http://www.sciencedirect.com/science/article/pii/S223878542500122XElectrochemical machiningTi6Al4V alloyPassivation filmElectrolyte effectsSurface roughnessTranspassive dissolution |
| spellingShingle | Jun Yu Linzeng Wang Guoqiang Kang Xin Lin Lijun Tian Pengfei Guo Liangyi Wu Weidong Huang Effects of electrolytes on electrochemical behaviour and performance of Ti6Al4V alloy prepared by laser directed energy deposition Journal of Materials Research and Technology Electrochemical machining Ti6Al4V alloy Passivation film Electrolyte effects Surface roughness Transpassive dissolution |
| title | Effects of electrolytes on electrochemical behaviour and performance of Ti6Al4V alloy prepared by laser directed energy deposition |
| title_full | Effects of electrolytes on electrochemical behaviour and performance of Ti6Al4V alloy prepared by laser directed energy deposition |
| title_fullStr | Effects of electrolytes on electrochemical behaviour and performance of Ti6Al4V alloy prepared by laser directed energy deposition |
| title_full_unstemmed | Effects of electrolytes on electrochemical behaviour and performance of Ti6Al4V alloy prepared by laser directed energy deposition |
| title_short | Effects of electrolytes on electrochemical behaviour and performance of Ti6Al4V alloy prepared by laser directed energy deposition |
| title_sort | effects of electrolytes on electrochemical behaviour and performance of ti6al4v alloy prepared by laser directed energy deposition |
| topic | Electrochemical machining Ti6Al4V alloy Passivation film Electrolyte effects Surface roughness Transpassive dissolution |
| url | http://www.sciencedirect.com/science/article/pii/S223878542500122X |
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