Abstract
A Ti–45.9Al–8Nb (at%) alloy with a lamellar structure (γ+α2) was oxidised in air at 700, 800, 850 and 900°C in isothermal and thermal cycling conditions. The reaction progress was followed by thermogravimetric measurements. In isothermal conditions the oxidation kinetics followed approximately a parabolic rate law and the rate constants ranged from about 10–12 kg2 m–4 s–1 at 700°C to 10–10 kg2 m–4 s–1 at 900°C. The oxide scales were built of Al2O3 and TiO2, the former being the main component of the outermost layer. The oxidation behaviour of Ti–45.9Al–8Nb was referred to a commercial titanium alloy, WT4 (Ti–6Al–1Mn), and selected oxidation-resistant alloys.
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Godlewska, E., Mitoraj, M., Devred, F. et al. Reactivity of a Ti–45.9Al–8Nb alloy in air at 700–900°C. J Therm Anal Calorim 88, 225–230 (2007). https://doi.org/10.1007/s10973-006-8291-x
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DOI: https://doi.org/10.1007/s10973-006-8291-x