Effects of plasma electrolytic polishing treatment on the surface morphology, microstructure and corrosion resistance of additively manufactured TC4 titanium alloy
This study investigates the effect of plasma electrolytic polishing (PEP) on the surface morphology and corrosion resistance of TC4 titanium alloy parts fabricated by selective laser melting (SLM). Mechanical polishing (MP) was used as the control group. The surface topography, micromorphology, phas...
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| 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/S2238785425005782 |
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| author | Dengke Liu Xuewen Zong Pengsheng Xue Zhongtang Gao Weijie Wu Zengquan Song Fan Ye Ying Pang Yan Zhang Hongzhi Zhou Hui Li Bingheng Lu |
| author_facet | Dengke Liu Xuewen Zong Pengsheng Xue Zhongtang Gao Weijie Wu Zengquan Song Fan Ye Ying Pang Yan Zhang Hongzhi Zhou Hui Li Bingheng Lu |
| author_sort | Dengke Liu |
| collection | DOAJ |
| description | This study investigates the effect of plasma electrolytic polishing (PEP) on the surface morphology and corrosion resistance of TC4 titanium alloy parts fabricated by selective laser melting (SLM). Mechanical polishing (MP) was used as the control group. The surface topography, micromorphology, phase composition, open circuit potential (OCP), potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS) of both PEP- and MP-treated samples were compared and analyzed. The results demonstrate that the PEP process effectively eliminates the surface defects inherent to SLM, resulting in a smoother and more uniform surface compared to the MP-treated samples. Electrochemical analysis, including PDP and EIS, suggests that the oxide film formed after PEP treatment offers superior corrosion resistance. This enhancement is attributed to the higher β-phase content (18.4%) in the PEP-treated SLMed TC4 alloy, which contributes to the formation of a more stable oxide layer and increased charge transfer resistance. These findings expand the application of PEP technology and offer new solutions for enhancing the surface quality and corrosion resistance of additively manufactured TC4 titanium alloy. |
| format | Article |
| id | doaj-art-7ab7e729721249e3b8bab978ad33ebac |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-7ab7e729721249e3b8bab978ad33ebac2025-08-20T01:58:27ZengElsevierJournal of Materials Research and Technology2238-78542025-03-01357008701710.1016/j.jmrt.2025.03.067Effects of plasma electrolytic polishing treatment on the surface morphology, microstructure and corrosion resistance of additively manufactured TC4 titanium alloyDengke Liu0Xuewen Zong1Pengsheng Xue2Zhongtang Gao3Weijie Wu4Zengquan Song5Fan Ye6Ying Pang7Yan Zhang8Hongzhi Zhou9Hui Li10Bingheng Lu11School of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an, 710054, ChinaSchool of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an, 710054, China; Corresponding author.School of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an, 710054, ChinaSchool of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an, 710054, ChinaSchool of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an, 710054, ChinaSchool of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an, 710054, ChinaSchool of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an, 710054, ChinaSchool of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an, 710054, ChinaSchool of Mechanical Engineering, Hunan Institute of Science and Technology, Yueyang, 414000, ChinaSchool of Mechanical Engineering, Hunan Institute of Science and Technology, Yueyang, 414000, ChinaNation Innovation institute of Additive Manufacturing, Xi'an, 710054, ChinaNation Innovation institute of Additive Manufacturing, Xi'an, 710054, ChinaThis study investigates the effect of plasma electrolytic polishing (PEP) on the surface morphology and corrosion resistance of TC4 titanium alloy parts fabricated by selective laser melting (SLM). Mechanical polishing (MP) was used as the control group. The surface topography, micromorphology, phase composition, open circuit potential (OCP), potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS) of both PEP- and MP-treated samples were compared and analyzed. The results demonstrate that the PEP process effectively eliminates the surface defects inherent to SLM, resulting in a smoother and more uniform surface compared to the MP-treated samples. Electrochemical analysis, including PDP and EIS, suggests that the oxide film formed after PEP treatment offers superior corrosion resistance. This enhancement is attributed to the higher β-phase content (18.4%) in the PEP-treated SLMed TC4 alloy, which contributes to the formation of a more stable oxide layer and increased charge transfer resistance. These findings expand the application of PEP technology and offer new solutions for enhancing the surface quality and corrosion resistance of additively manufactured TC4 titanium alloy.http://www.sciencedirect.com/science/article/pii/S2238785425005782TC4 titanium alloySLMPlasma electrolytic polishingSurfaceCorrosion resistance |
| spellingShingle | Dengke Liu Xuewen Zong Pengsheng Xue Zhongtang Gao Weijie Wu Zengquan Song Fan Ye Ying Pang Yan Zhang Hongzhi Zhou Hui Li Bingheng Lu Effects of plasma electrolytic polishing treatment on the surface morphology, microstructure and corrosion resistance of additively manufactured TC4 titanium alloy Journal of Materials Research and Technology TC4 titanium alloy SLM Plasma electrolytic polishing Surface Corrosion resistance |
| title | Effects of plasma electrolytic polishing treatment on the surface morphology, microstructure and corrosion resistance of additively manufactured TC4 titanium alloy |
| title_full | Effects of plasma electrolytic polishing treatment on the surface morphology, microstructure and corrosion resistance of additively manufactured TC4 titanium alloy |
| title_fullStr | Effects of plasma electrolytic polishing treatment on the surface morphology, microstructure and corrosion resistance of additively manufactured TC4 titanium alloy |
| title_full_unstemmed | Effects of plasma electrolytic polishing treatment on the surface morphology, microstructure and corrosion resistance of additively manufactured TC4 titanium alloy |
| title_short | Effects of plasma electrolytic polishing treatment on the surface morphology, microstructure and corrosion resistance of additively manufactured TC4 titanium alloy |
| title_sort | effects of plasma electrolytic polishing treatment on the surface morphology microstructure and corrosion resistance of additively manufactured tc4 titanium alloy |
| topic | TC4 titanium alloy SLM Plasma electrolytic polishing Surface Corrosion resistance |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425005782 |
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