Tailoring a Low Young Modulus for a Beta Titanium Alloy by Combining Severe Plastic Deformation with Solution Treatment |
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| Authors: | Anna Nocivin Doina Raducanu Bogdan Vasile Corneliu Trisca-Rusu Elisabeta Mirela Cojocaru Alexandru Dan Raluca Irimescu Vasile Danut Cojocaru |
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| Affiliation: | 1.Department of Industrial Management, Ovidius University of Constanța, 900527 Constanța, Romania;2.Department of Metallic Materials Processing and Ecometallurgy, University Politehnica of Bucharest, 060042 Bucharest, Romania; (D.R.); (B.V.); (E.M.C.); (A.D.); (R.I.);3.Department of Science, National Institute for Research and Development in Micro-Technologies, 077190 Bucharest, Romania; |
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| Abstract: | 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. |
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| Keywords: | β -titanium alloys, XRD, SEM, HRTEM, mechanical properties |
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