Martensitic transformation and shape memory behavior of Ti-V-Al-Fe lightweight shape memory alloys

Effects of Fe addition on martensitic transformation and shape memory behavior of Ti-V-Al-Fe alloys were investigated. A little amount of Fe addition reduces martensitic transformation temperature rapidly and enhances shape memory effect of Ti-V-Al alloy. Alloy with an optimal Fe content, which is Ti-13V-3Al-1Fe, shows the largest recoverable strain of 5.8% and highest recovery stress of 250 MPa when pre-strain is 6%. Meanwhile, Ti-13V-3Al-1Fe alloy has a large elongation of 30%.