Abstract
Abstract Ti–5Al–2.5Sn is one of the oldest titanium alloys and has been used mainly in low-temperature applications such as hydrogen tanks and pressure vessels. The study here was conducted to investigate the superplasticity, dynamic recrystallization and cavitation of this alpha-titanium alloy during high temperature deformation; uniaxial tensile tests were carried out at various temperatures between 600 and 900 °C with different initial strain rates. Microstructure evolution during high temperature tensile testing was studied by using electron back-scattered diffraction. Recrystallization can be observed during high temperature tensile test and this process not only decreases the average grain size but also increases the average misorientation angle, and this aids the superplastic process.
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