Coating of Ti6Al4V Alloys by Physical Vapor Deposition Method and Micro-scratch and Corrosion Test Investigations of Coated Samples
DOI:
https://doi.org/10.29329/jaasci.2023.562.05Keywords:
Coating, Corrosion, Micro-scratch, PVDAbstract
Titanium alloys are one of the most preferred materials in the aerospace industry due to their low density and high mechanical properties. It is also widely preferred in diving and marine equipment due to its excellent corrosion resistance in the marine environment. Due to its high biocompatibility and corrosion resistance, it is also used as a basic component of the biomedical materials sector, especially as implant material. However, titanium alloy has poor wear resistance, so surface treatment is required before use in many applications. In this respect, coated titanium alloys are expected to exhibit higher wear and corrosion resistance. In this study, TiAlN, AlCrN, TiSiN and TiN coatings were applied to the samples using Ti6Al4V alloy as the base material by PVD method at two different coating thicknesses, followed by micro-scratch and corrosion tests on the coated samples. As a result of the micro-scratch tests, it was determined that the indentation depth of the samples increased with the increase in the applied dynamic force, the average friction coefficient values varied between 0.08 and 0.16, and the results of the corrosion tests showed that the cathodic current densities of the coating samples varied considerably compared to the base material. Among the corrosion samples, the closest current density to the base material was observed in the thin AlCrN coating, while the lowest corrosion rate was observed in the thick TiN coating.
References
Ahmad, F. N., & Zuhailawati, H. (2020). A brief review on the properties of titanium as a metallic biomaterials. International Journal of Electroactive Materials, 8(2020), 63-67.
Chim, Y. C., Ding, X. Z., Zeng, X. T., & Zhang, S. (2009). Oxidation resistance of TiN, CrN, TiAlN and CrAlN coatings deposited by lateral rotating cathode arc. Thin Solid Films, 517(17), 4845-4849. https://doi.org/10.1016/j.tsf.2009.03.038
Islak, S., & Ozorak, C. (2018). Microstructure, corrosion and wear properties of FeCrNiMo based coating produced on AISI 1040 steel by using laser coating technique. Hittite Journal of Science and Engineering, 5(3), 219-223. https://doi.org/10.17350/HJSE19030000098
Leyendecker, T., Lemmer, O., Esser, S., & Ebberink, J. (1991). The development of the PVD coating TiAlN as a commercial coating for cutting tools. Surface and Coatings Technology, 48(2), 175-178. https://doi.org/10.1016/0257-8972(91)90142-J
Li, N., Xiong, Y., Xiong, H., Shi, G., Blackburn, J., Liu, W., & Qin, R. (2019). Microstructure, formation mechanism and property characterization of Ti+ SiC laser cladded coatings on Ti6Al4V alloy. Materials Characterization, 148, 43-51. https://doi.org/10.1016/j.matchar.2018.11.032
Luo, Y., Ge, S., Liu, H., & Jin, Z. (2009). Microstructure analysis and wear behavior of titanium cermet femoral head with hard TiC layer. Journal of Biomechanics, 42(16), 2708–2711. https://doi.org/10.1016/j.jbiomech.2009.08.003
Mattox, D. M. (2010). Physical vapour deposition (PVD) processing. Elsevier Publishing.
Sa'aidi, A. F., Ahmad, F. N., & Zuhailawati H. (2022). Influence of processing parameters on dehydrogenation of TiH2in thepreparation of Ti–Nb: A review. Heliyon, 8(11), e11602. https://doi.org/10.1016/j.heliyon.2022.e11602
Sha, W., & Malinov, S. (2009). Titanium alloys: Modelling of microstructure, properties and applications. Woodhead Publishing.
Wang, D., Tian, Z., Shen, L., Liu, Z., & Huang, Y. (2008). Research states of laser surface modification technology on titanium alloys. Laser and Optoelectronics Progress, 45, 24-32.
