Coating of Ti-6Al-4V alloy substrates with TiN/Ti multi-layered films by magnetron sputteringT. Sonoda, S. Kotake, K. Katou and T. AsahinaEur. Phys. J. Appl. Phys., 38 1 (2007) 69-72DOI: https://doi.org/10.1051/epjap:2007050