Oxidation Behavior of β-21S Titanium Alloy over Temperature Range 600 deg C to 800 deg C

摘要

This study focused on the oxidation behavior of the ultra-high strength metastable β-21S Titanium alloy (Ti-15Mo-2.7Nb-3Al-0.2Si, wt /100) over the temperature range 600～880 deg C. The experimental results show that the β-21S alloy has a better oxidation resistance that the commercial pure titanium, oxidation proceeds by growth of a surface oxide of TiO_2 and oxygen dissolution into the metal, oxidation initially follows an approximate linear oxidation rate which is followed by an approximate parabolic rate, the activation energies are 24.0 kJ/mol and 47.6 kJ/mol, respectively.