Ti6Al4V Surface Hardness Improvement by Duplex Coating

Abstract:

Ti6Al4V alloy are among the most widely used materials in engineering applications. This is because their relatively beneficial properties. However, inadequate wear properties of Ti6Al4V alloy have largely constrained the application for this material. In this study, Plasma nitriding of the Ti6Al4V was performed using microwave plasma technique at 600°C for 1hour, 3 hours and 5 hours then followed with deposition of CrN on plasma nitrided samples for duplex coating purposes. Microstructural analysis and hardness measurement revealed that formation of Ti₂N and TiN phases indicating the formation of compound layer is observed for substrate nitrided at temperature as low as 600°C 1 hour and a substantial increase on the surface hardness of plasma nitrided Ti6Al4V is observed with an increase of process time. The duplex coating obtained in this study has significant surface hardness property and superior as compared with CrN coatings deposited on as received Ti6Al4V.

• Periodical: Advanced Materials Research (Volume 701)
• Pages: 370-374
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.701.370
• Online since: May 2013
• Authors: Yusliza Yusuf, Zulkifli Mohd Rosli, Jariah Mohd Juoi, Zainab Mahamud, Kwan Wai Loon
• Keywords: CrN Coating, Duplex Coating, Plasma Nitriding, Ti6Al4V

References

[1] Bell, T., Dong, H., Sun, Y. (1998). Realising the potential of duplex surface engineering. Tribology International, Vol.31, pp.127-137.

DOI: 10.1016/s0301-679x(98)00015-2

[2] Zhecheva, A., Sha, W., Malinov, S., Long, A. (2005). Enhancing the microstructure and properties of titanium alloys through nitriding and other surface engineering methods. Surface and Coatings technology, Vol.200, pp.2192-2207.

DOI: 10.1016/j.surfcoat.2004.07.115

[3] Kamminga, J.D., Hoy, R., Janssen, G.C.A.M., Lugscheider, E., Maes, M. (2003). First result on duplex coatings without intermediate mechanical treatment. Surface and Coatings Technology, Vol. 174-175, pp.671-676.

DOI: 10.1016/s0257-8972(03)00578-4

[4] Fu, Y., Wei, J., Yan, B., Loh, N.L. (2000). Characterization and tribological evaluation of duplex treatment by depositing carbon nitride films on plasma nitrided Ti-6Al-4V. Journal of Materials Science, Vol. 35, pp.2215-2227.

DOI: 10.1016/s0043-1648(99)00313-0

[5] El hossary, F., Negm, N., El rahman, A., Hammad, M., Templier, C. (2008). Duplex surface treatment of AISI 304 austenitic steel using RF nitriding and DC reactive magnetron sputtering of titanium. Surface and Coatings Technology, Vol. 202, pp.1392-1400.

DOI: 10.1016/j.surfcoat.2007.06.066

[6] Yan, B., Loh, N.E., Fu, Y. (2000) Effect of duplex pre-treatment on diamond deposition on pure titanium. Journal of Materials Science Letters, Vol. 19, pp.1139-1141.

[7] Yetim, A.F., Celik, A., Alsaran, A. (2010). Improving tribological properties of Ti-6Al-4V alloy with duplex surface treatment. Surface and Coatings Technology, Vol. 205, pp.320-324.

DOI: 10.1016/j.surfcoat.2010.06.048

[8] Park, Y.G., Wey, M.Y., Hong, S.I. (2007). Enhanced wear and fatigue properties of Ti-6Al-4V alloy modified by plasma carburizing/ CrN coating. Journal of Materials Science. Material in medicine, Vol. 18, pp.925-931.

DOI: 10.1007/s10856-006-0014-0

[9] Vidakis, N., Antoniadis, A., Bilalis, N. (2003). The VDI 3198 indentation test evaluation of a reliable qualitative control layered compounds. Journal of Materials Processing Technology. Vol. 143-144, pp.481-485.

DOI: 10.1016/s0924-0136(03)00300-5

[10] El hossary, F.M., Negm, N.Z., Khalil, S.M., Raaif, M.( 2006). Surface modification of titanium by radio frequency plasma nitriding. Thin Solid Films. Vol. 497, pp.196-202.

DOI: 10.1016/j.tsf.2005.09.193