Effect of Ta Content on Microstructure and Phase Transformation Temperatures of Ti75.5-Nb25.5 (%at.) Alloy

Authors : Safar MOHAMMED, Fethi DAĞDELEN, Ibrahim Nazem QADER

Pages : 1129-1138

Doi:10.35378/gujs.947678

View : 53 | Download : 8

Publication Date : 2022-09-01

Article Type : Research Paper

Abstract :β-titanium shape memory alloys are used as shape memory-based biomedical applications and superelastic materials because they are made up of non-toxic components. Also, their behaviors are more semilar with that of human bone and dental biological tissues, such as biocompatibility, superior corrosion resistance, low density, and low modulus of elasticity. In the current study, the effect of Ta additive on the physical properties of Ti-Nb alloy has been investigated. Ti-Nb-Ta alloy samples were produced such that the Tantalum insert ignore into journalissuearticles values(Ta); element was substituted instead of Niobium insert ignore into journalissuearticles values(Nb);, and the induction arc melting was used to melting the mixed powders. To investigate the crystal structure, microstructure, and phase transformation temperatures of all samples, the X-Ray Diffraction insert ignore into journalissuearticles values(XRD);, Scanning Electron Microscopic insert ignore into journalissuearticles values(SEM);, and Diffraction Scanning Calorimetry insert ignore into journalissuearticles values(DSC); measurements have been used. Both β-rich and α peaks were observed in the XRD and SEM measurements. Also, the DSC results revealed that the Ti-Nb-Ta alloys have only austenite transformation temperatures and their phase austenite phase transformation were decreased by the effect of Ta additive, additionally, the enthalpy change in〖 E〗_3 sample insert ignore into journalissuearticles values( Ti_75.5 Nb_22.5 Ta_2 insert ignore into journalissuearticles values(%at);); has the highest value, while E_4 sample insert ignore into journalissuearticles values( Ti_75.5 Nb_21.5 Ta_3 insert ignore into journalissuearticles values(%at);); has the lowest respective value. 
Keywords : Shape memory alloy, β titanium alloy, Ti Nb Ta, microstructure

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