Optical microscopy, scanning electron microscopy (SEM), X-ray diffractometry (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and a hardness tester were used to understand the microstructure and to characterise the phases formed in a Ti-6Al-4V alloy at different tracks and depths, produced by laser nitriding under a dilute nitrogen environment with a spinning beam. The results show that the solidified melt consists of α′-Ti and TiNx. Using XRD, x was determined to be 0.75 while from XPS, x lay in a range of 0.5-0.8. The melt zone showed a range of hardness of between 500 and 800 HV.
- titanium alloy
Selamat, M. S., Baker, T. N., & Watson, L. M. (2001). Study of the surface layer formed by the laser processing of Ti-6Al-4V alloy in a dilute nitrogen environment. Journal of Materials Processing Technology, 113(1-3), 509-515. https://doi.org/10.1016/S0924-0136(01)00595-7