Mechanical behavior and martensitic transformation of a Ti-Mo based shape memory alloy Ti-9. 5Mo-4Nb-2V-3Al
SONG Jie1, JIANG Hong2, FAN Zhi-guo3，ZHAO Jia-feng1
（1. School of Mechanical and Electrical Engineering, Qingdao University of Technology, Qingdao 266300, Shandong, China 2. School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China 3. Irestal Shanghai Stainless Pipe Company Limited, Shanghai 200240, China）
Abstract：Mechanical properties and shape memory effect (SME) of Ti-9. 5Mo-4Nb-2V-3Al (mass%) alloy with low elastic modulus (66 MPa) has been investigated. The lath-shaped martensite can be stress-induced from the parent phase by tensile deformation. Shape memory effect with a completely nonlinear recoverable strain of 2. 2% was obtained when the deformed specimen heated to 223 ℃ and the reverse martensite transformation occured, which has been verified by X-ray diffraction (XRD), DSC and electrical resistivity method. The starting temperature of the reverse martensitic transformation is 92 ℃ and the finishing temperature is 105 ℃.
2015, Vol. 22 
