Surface polishing and modification of Ti-6Al-4V alloy by shear thickening polishing
Journal article
Wang, J., Zhou, Y., Qiao, Z., Goel, S., Wang, J., Wang, X., Chen, H., Yuan, J. and Lyu, B. (2023). Surface polishing and modification of Ti-6Al-4V alloy by shear thickening polishing. Surface & Coatings Technology. 468, p. 129771. https://doi.org/10.1016/j.surfcoat.2023.129771
Authors | Wang, J., Zhou, Y., Qiao, Z., Goel, S., Wang, J., Wang, X., Chen, H., Yuan, J. and Lyu, B. |
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Abstract | In this study, a comparison of three newly developed polishing techniques namely, shear thickening polishing (STP), Chemistry enhanced STP (C-STP) and Electrolysis enhanced STP (E-STP) was made to investigate their suitability to Ti-6Al-4V biomaterials polishing and modification, which can produce Beilby layer after polishing and enhance mechanical and biological performance. The surface roughness Sa after STP was about 13.8 nm with a material removal rate of 54.3 nm/min. The C-STP showed the lowest surface roughness of 7.2 nm which was almost half that of STP and the MRR during C-STP was almost 2.1 times that of the conventional STP. The STP did not lead to any change of the surface composition, whereas a 136 nm thick Beilby layer was observed to form during the C-STP which revealed a lower friction coefficient of 0.04 as well as improved osteoblast cell activity. The E-STP showed an intermittent improvement as it provided a surface roughness of 10.2 nm and 1.6 times MRR than that obtained from conventional STP. Due to the dense oxide film of about 60 nm, the E-STP processed surface showed the best wettability and corrosion resistance. Overall, we reveal an important pathway for achieving scalable finishing on Ti-6Al-4V with desirable surface characteristics. |
Keywords | STP; Ti6Al4V |
Year | 2023 |
Journal | Surface & Coatings Technology |
Journal citation | 468, p. 129771 |
Publisher | Elsevier |
ISSN | 1879-3347 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.surfcoat.2023.129771 |
Web address (URL) | https://www.sciencedirect.com/journal/surface-and-coatings-technology |
Publication dates | |
03 Jul 2023 | |
Publication process dates | |
Accepted | 02 Jul 2023 |
Deposited | 03 Jul 2023 |
Accepted author manuscript | License File Access Level Open |
https://openresearch.lsbu.ac.uk/item/945w9
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