Abstract

Isothermal oxidation testing of a Ga-containing near-α Ti alloy was performed in air at 650, 700, and 750 °C for up to 500 h. Results revealed that the alloy oxidation kinetics followed a parabolic law at 650 °C and a parabolic–cubic law at 700 and 750 °C, while the abundance of Al2O3 in the oxide layers increased with temperature after the dissolution of Ga2O3 species in the Al2O3 phase. The activation energy of the α-case formation was close to the magnitudes obtained for conventional Ti alloys despite its temperature-dependent recrystallization near the oxide/metal interface at 700 and 750 °C.

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