Effect of niobium content on the microstructure and Young's modulus of Ti-xNb-7Zr alloys for medical implants

Tan, Magdalen; Baghi, Alireza Dareh; Ghomashchi, Reza; Xiao, Wenlong; Oskouei, Reza Hashemi

doi:10.1016/j.jmbbm.2019.07.014

Cited by 38 publications

(18 citation statements)

References 51 publications

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“…The lowest elastic modulus of 29 GPa was obtained for 33 wt% of Nb alloy with β and α ′′ phases, and this alloy has the highest β and lowest α ′′ phases. 160 Xu et al investigated the Ti-10Mo-Nb alloy with Nb composition of 3, 7, and 10 wt%. With the rise in Nb content, hardness decreased as the α phase reduced, and the highest hardness was obtained for 3 wt% Nb alloy with α and β phases.…”

Section: Ternary Alloys Magdalen Et Al Investigated the Influence Of ...mentioning

confidence: 99%

A review on β-Ti alloys for biomedical applications: The influence of alloy composition and thermomechanical processing on mechanical properties, phase composition, and microstructure

Kanapaakala

Sathesh

2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Titanium and its alloys are potential materials for orthopedic implant applications due to their appropriate biological and mechanical behavior. As biocompatibility and biomechanical compatibilities are essential parameters for determining a biomedical implant's performance and service life, this research review article discussed the novel Ti alloys with nontoxic and biocompatible alloying elements with an elastic modulus similar to the bone. Among Ti alloys, β-Ti alloys are appropriate for load-bearing implant applications due to lower elastic modulus and nontoxic elements, including Ti, Ta, Nb, Zr, Sn, and Mo. Even though the β-Ti alloys possess a lesser elastic modulus compared to other metallic biomaterials, two issues associated with β-Ti alloys that result in implant failure are that they still possess a higher elastic modulus than human bone and they have insufficient strength. Alloy composition and thermomechanical processing characteristics play a vital role in altering the mechanical properties and microstructure of β-Ti alloys. Hence, this review article emphasizes the alloying and thermomechanical processing effects on the mechanical properties and microstructure of β-Ti alloys.

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Section: Ternary Alloys Magdalen Et Al Investigated the Influence Of ...mentioning

confidence: 99%

A review on β-Ti alloys for biomedical applications: The influence of alloy composition and thermomechanical processing on mechanical properties, phase composition, and microstructure

Kanapaakala

Sathesh

2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…An approximation of the total Gibbs free energy stored (∆G T ) during milling can be estimated adding Equations (13) and (14), resulting in Equation (16). The condition necessary for the solid solution to be formed is when ∆G T > ∆G m .…”

Section: Estimation Of Storage Energy Produced By Crystalline Defectsmentioning

confidence: 99%

“…Therefore, in recent decades, research in this area has been focused on the development of new Ti-based alloys with non-toxic elements to the human body. In this sense, there is a second generation of Ti-based alloys that incorporates elements such as Ta, Nb, Mo and/or Zr [14][15][16][17]. The alloys produced using the alloying elements mentioned previously have additional advantages over Ti-6AI-4V, such as high wear strength and a lower modulus of elasticity.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis of the Formation of FCC and BCC Solid Solutions of Ti-Based Ternary Alloys by Mechanical Alloying

Aguilar

Martínez

Tello

et al. 2020

Metals

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A thermodynamic analysis of the synthesis of face-centred cubic (fcc) and body-centred cubic (bcc) solid solutions of Ti-based alloys produced by mechanical alloying was performed. Four Ti-based alloys were analysed: (i) Ti-13Ta-3Sn (at.%), (ii) Ti-30Nb-13Ta (at.%), (iii) Ti-20Nb-30Ta (wt. %) and (iv) Ti-33Nb-4Mn (at.%). The milled powders were characterized by X-ray diffraction, and the crystallite size and microstrain were determined using the Rietveld and Williamson-Hall methods. The Gibbs free energy of mixing for the formation of a solid solution of the three ternary systems (Ti-Ta-Sn, Ti-Nb-Ta and Ti-Nb-Mn) was calculated using an extended Miedema's model, applying the Materials Analysis Applying Thermodynamics (MAAT) software. The values of the activity of each component were determined by MAAT. It was found that increasing the density of crystalline defects, such as dislocations and crystallite boundaries, changed the solubility limit in these ternary systems. Therefore, at longer milling times, the Gibbs free energy increases, so there is a driving force to form solid solutions from elemental powders. Finally, there is agreement between experimental and thermodynamic data confirming the formation of solid solutions.Author Contributions: Conceptualization, C.A. and C.M.; methodology, C.A. and F.S.M.; software, C.A.; validation, I.A.; formal Analysis, C.A., C.M. and S.P.; investigation, C.A., F.S.M. and K.T.; writing-original draft preparation, C.A., S.P. and A.D.; writing-review and editing, S.P., A.D., K.T. and I.A.; visualisation, C.A. and I.A.; project administration, C.A.; funding acquisition, C.A. and K.T. All authors have read and agreed to the published version of the manuscript. Funding:The authors would like to acknowledge the financial support received from the FONDECYT project n 1190797 and FONDEQUIP/EQM project n 140095. Conflicts of Interest:The authors declare no conflict of interest.

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“…Among them, β-type Ti alloys have been confirmed to have the lowest Young's modulus, and thus they have attracted increasing research attention in recent years. Up to date, many β-type Ti alloys have been developed, such as Gum metal [18], Ti-Nb-Ta-Zr [7,11,19,20], Ti-Nb-Sn [21][22][23][24], Ti-Nb-Zr [9,[25][26][27][28][29][30], Ti-Nb-Hf [31] and Ti-Nb-Zr-Sn [32,33]. It is noted that most β-type Ti alloys exhibiting low Young's modulus contain Nb as a β stabilizing alloying element due to the moderate β phase stabilizing ability and biocompatibility.…”

Section: Introductionmentioning

confidence: 99%

“…Despite such extensive research, much uncertainty still exists on the relations among Young's modulus, martensitic transformation behavior, and the values of e/a, Bo, and Md, and the experimental data are still insufficient to understand the mechanisms involved. This study focuses on the effect of the Zr addition on the phase stability and Young's modulus in Ti-Nb alloys because Zr has been used as a major alloying element in β-type Ti alloys for biomedical applications due to its superior biocompatibility [2,9,11,[25][26][27][28][29][30]32,33]. It has been demonstrated that Zr suppresses the martensitic transformation from the β phase to the α phase and enhances the stability of the β phase of Ti-Nb alloys [32,38,58].…”

Section: Introductionmentioning

confidence: 99%

Effect of Zr Content on Phase Stability, Deformation Behavior, and Young’s Modulus in Ti–Nb–Zr Alloys

Kim

Miyazaki

2020

Materials

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Ti alloys have attracted continuing research attention as promising biomaterials due to their superior corrosion resistance and biocompatibility and excellent mechanical properties. Metastable β-type Ti alloys also provide several unique properties such as low Young’s modulus, shape memory effect, and superelasticity. Such unique properties are predominantly attributed to the phase stability and reversible martensitic transformation. In this study, the effects of the Nb and Zr contents on phase constitution, transformation temperature, deformation behavior, and Young’s modulus were investigated. Ti–Nb and Ti–Nb–Zr alloys over a wide composition range, i.e., Ti–(18–40)Nb, Ti–(15–40)Nb–4Zr, Ti–(16–40)Nb–8Zr, Ti–(15–40)Nb–12Zr, Ti–(12–17)Nb–18Zr, were fabricated and their properties were characterized. The phase boundary between the β phase and the α′′ martensite phase was clarified. The lower limit content of Nb to suppress the martensitic transformation and to obtain a single β phase at room temperature decreased with increasing Zr content. The Ti–25Nb, Ti–22Nb–4Zr, Ti–19Nb–8Zr, Ti–17Nb–12Zr and Ti–14Nb–18Zr alloys exhibit the lowest Young’s modulus among Ti–Nb–Zr alloys with Zr content of 0, 4, 8, 12, and 18 at.%, respectively. Particularly, the Ti–14Nb–18Zr alloy exhibits a very low Young’s modulus less than 40 GPa. Correlation among alloy composition, phase stability, and Young’s modulus was discussed.

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Effect of niobium content on the microstructure and Young's modulus of Ti-xNb-7Zr alloys for medical implants

Cited by 38 publications

References 51 publications

A review on β-Ti alloys for biomedical applications: The influence of alloy composition and thermomechanical processing on mechanical properties, phase composition, and microstructure

A review on β-Ti alloys for biomedical applications: The influence of alloy composition and thermomechanical processing on mechanical properties, phase composition, and microstructure

Thermodynamic Analysis of the Formation of FCC and BCC Solid Solutions of Ti-Based Ternary Alloys by Mechanical Alloying

Effect of Zr Content on Phase Stability, Deformation Behavior, and Young’s Modulus in Ti–Nb–Zr Alloys

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