Tribological performance of plasma nitrided gamma based titanium aluminides

Ti–48Al–2Nb–2Mn (at.%) alloy was plasma nitrided to investigate the effect of this thermochemical surface modification on the tribological behavior of gamma based titanium aluminides. The effects of nitriding temperature, nitriding time and H2/N2 gas ratio were investigated. Characterization of the microstructure and phases formed within the nitrided surface layers was performed using optical and electron