Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf
2 PublikationenStructural characterisation of hardening of Ti-Al-V alloys after nitridation by plasma immersion ion implantation
Berberich, F.; Matz, W.; Kreissig, U.; Richter, E.; Schell, N.; Möller, W.
Abstract
The surface hardness of the titanium alloy Ti-6Al-4V, widely used as construction material, can be improved by nitrogen implantation. The paper reports on a complex study of the structural mechanisms of hardening and its loss at higher temperatures with different methods (grazing incidence X-ray diffraction, in-situ high temperature diffraction with synchrotron radiation, ERDA, hardness and surface inspection by SEM). Plasma immersion ion implantation produces a nitrogen profile directly below the surface. The formation of small TiN crystallites is detected but the hardness increase is only about 40%. Annealing leads to the reduction of the TiN phase and the formation of Ti2N deeper in the material. The in-situ XRD study of the phase formation gives information about the temperature range of the changes. The hardness increases after annealing by a factor of 2.5 compared to the unimplanted state. It is explained by precipitation hardening due to the formation of titanium nitrides in different depths of the material.
Keywords: Ti-6Al-4V; plasma immersion ion implantation; XRD; hardness
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Vortrag (Konferenzbeitrag)
11. Arbeitstagung Angewandte Oberflächenanalyse (AOFA 11), Leipzig, 24.-28.9.2000 - Applied Surface Science 179 (2001) 13-19
Permalink: https://www.hzdr.de/publications/Publ-3510