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Surface modification of Ti-4Al-2V alloy by nitrogen implantation
- Wang, Z. G., Zu, X. T., Xiang, X., Zhu, S., Wang, L. M.
- Journal of materials science 2006 v.41 no.11 pp. 3363-3367
- X-ray diffraction, X-ray photoelectron spectroscopy, alloys, energy industry, engineering, hardness, irradiation, nitrogen, steam, titanium
- Ti-4Al-2V is a new type of alpha titanium alloy that suitable for the application in high-temperature and high-pressure water/steam environment. Ti-4Al-2V can be used in marine engineering, nuclear power industry. In this paper the surface characterization of the Ti-4Al-2V implanted with 75 keV nitrogen with fluences of 3 × 10¹⁷ and 8 × 10¹⁷ N⁺/cm² is investigated by glancing-incidence XRD, XPS and microhardness. The results show that new phase TiN are formed after N implantation in the surface region. The nitrogen implantation increases the surface hardness up to 340 and 260% for fluence of 8 × 10¹⁷ and 3 × 10¹⁷ N⁺/cm², respectively. The enhancement of hardness is related to the formation of TiN and irradiation induced hardness.