Effect of Thermo-Mechanical Deformation on the Microstructure Evolution in a High Temperature Ti Alloy with Erbium
The effect of thermo-mechanical deformation on the microstructure was investigated by isothermal compression and microstructure characterization. The mechanical response of as-casted Ti–6.2Al–3Sn–5Zr–0.5Mo–1.0Nb–0.4Si–0.2Er titanium alloy was sensitive to the deformation temperatures and strain rates. The true stress increased with the increase in the strain rate and decreased in temperature. The discontinuous dynamic recrystallization of β phase was promoted with the increase in temperatures. Global α phase generated during the deformation at a temperature of 980 °C. The (Ti, Zr)3Si and participated phase were dissolved into the matrix above 950 °C, which acted as the homogenizing annealing process. However, novel participated phases with an average diameter of 20 nm generated.
KeywordsThermo-mechanical deformation High-temperature titanium Microstructure
This research was supported by the Beijing Natural Science Foundation (Project No. 2162004), and National Natural Science Foundation of China (Project No. 51371013).
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