• Vasile, Bogdan Stefan
• Trisca-Rusu, Corneliu
• Raducanu, Doina
• Irimescu, Raluca
• Dan, Alexandru
• Nocivin, Anna
• Cojocaru, Elisabeta Mirela
• Cojocaru, Vasile Danut

Abstract

<jats:p>The present paper analyzed the microstructural characteristics and the mechanical properties of a Ti–Nb–Zr–Fe–O alloy of β-Ti type obtained by combining severe plastic deformation (SPD), for which the total reduction was of εtot = 90%, with two variants of super-transus solution treatment (ST). The objective was to obtain a low Young’s modulus with sufficient high strength in purpose to use the alloy as a biomaterial for orthopedic implants. The microstructure analysis was conducted through X-ray diffraction (XRD), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HRTEM) investigations. The analyzed mechanical properties reveal promising values for yield strength (YS) and ultimate tensile strength (UTS) of about 770 and 1100 MPa, respectively, with a low value of Young’s modulus of about 48–49 GPa. The conclusion is that satisfactory mechanical properties for this type of alloy can be obtained if considering a proper combination of SPD + ST parameters and a suitable content of β-stabilizing alloying elements, especially the Zr/Nb ratio.</jats:p>

Topics

• impedance spectroscopy
• microstructure
• polymer
• scanning electron microscopy
• x-ray diffraction
• strength
• transmission electron microscopy
• titanium
• titanium alloy
• yield strength
• tensile strength