Evaluation of the effects of plasma nitriding temperature and time on the characterisation of Ti 6Al 4V alloy

► Effects of PN temperature and time on surface properties of Ti 6Al 4V investigated. ► PN applied at 700-850 °C for 2-10 h, structural and tribological quality characterised. ► Compound layer (TiN + Ti2N), an aluminium-rich and α-diffusion regions were detected. ► Hardness, loadability and wear resistance improved, roughness and friction increased. ► Rising T&t gain thickness, hardness, roughness, friction, loadability, wear resistance.