Martensitic transformation and shape memory effect of Ti–V–Al lightweight high-temperature shape memory alloys

The effects of Al content on martensitic transformation and shape memory effect of Ti–V–Al alloys were investigated. The addition of Al suppressed the formation of ω phase and improved the shape memory effect and mechanical properties. The optimal Al content for getting a high martensitic transformation temperature and a good shape memory effect is determined to be 3 at.%. The recoverable strain with 6% pre-strain was 4.2% and the martensitic transformation temperature of Ti–13V–3Al was 359 °C. The alloy showed an elongation of over 20%.