Abstract
Ti–48Al–2Nb–2Mn (at.%) alloy was plasma nitrided to investigate the effect of this thermochemical surface modification on the tribological behaviour of gamma based titanium aluminides. The effects of nitriding temperature, nitriding time and H 2/N 2 gas ratio were investigated. Characterisation of the microstructure and phases formed within the nitrided surface layers was performed using optical and electron microscopy, X-ray diffraction (XRD) and glow discharge spectroscopy (GDS). The wear resistance of the plasma nitrided samples increased considerably against ball bearing steel (AISI 52100). Experimental results indicated that time controls the thickness and nitriding temperature, and H 2/N 2 ratio is responsible for the crystal structure of the nitrided layers. The nitrided compound layers consist of TiN and Ti 2AlN phases. The diffusion zone, in most cases comprises of recrystallised gamma grains beneath the compound layer.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
