The effect of treatment condition on boost diffusion of thermally oxidised titanium alloy

A two-step oxygen boost diffusion process has been developed to produce deep hard case on titanium alloys. The dissociation process of the oxide layer in the boost diffusion was investigated in detail. The process parameters have been optimised to tailor the oxygen profile to fit the engineering requirements. Metallographic, X-ray diffraction examinations as well as mechanical testing were performed to evaluate the boost diffused treated samples.