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

• DOI: 10.1016/j.scriptamat.2014.11.038
• Publication Date: 2014-12-19T12:45:06Z
• Authors: Z.Y. Yang; X.H. Zheng; W. Cai
• Keywords: Diffusionless transformation; Elongation; Strain (injury)

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%.