Microstructure and hardness of titanium and iron surfaces after megaelectronvolt nitrogen implantation Back to all publications Publication date 1 January 1989 Reference A.J. Vredenberg, F.Z. Cui, F.W. Saris, N.M. van der Pers and P.F. Colijn, Microstructure and hardness of titanium and iron surfaces after megaelectronvolt nitrogen implantation, Mater. Sci. Eng. A, 297-302 (1989)