Assessment of anodization conditions and annealing temperature on the microstructure, elastic modulus, and wettability of β-Ti40Nb alloy

Ricci, Virgilio Pereira; Santos, Rafael Formenton Macedo dos; Asato, Gabriel Hitoshi; Roche, Virginie; Jorge, Alberto Moreira; Afonso, Conrado Ramos Moreira

doi:10.1016/j.tsf.2021.138949

Cited by 12 publications

(4 citation statements)

References 67 publications

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“…Generally, β-type titanium alloys tend to have a low modulus of elasticity, avoiding the “stress shielding effect” [ 16 ]. Among the TNZT system alloys, two beta alloys stand out: Ti-35.3Nb-5.1Ta-7.1Zr, which has an elastic modulus value of 55 GPa, and Ti-29Nb-13Ta-4.6Zr (aged) has a high elastic modulus value for 80 GPa but an excellent tensile strength value (911 MPa) [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Surface Characterization of New β Ti-25Ta-Zr-Nb Alloys Modified by Micro-Arc Oxidation

2023

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The technique of surface modification using electrolytic oxidation, called micro-arc oxidation (MAO), has been used in altering the surface properties of titanium alloys for biomedical purposes, enhancing their characteristics as an implant (biocompatibility, corrosion, and wear resistance). The layer formed by the micro-arc oxidation process induces the formation of ceramic oxides, which can improve the corrosion resistance of titanium alloys from the elements in the substrate, enabling the incorporation of bioactive components such as calcium, phosphorus, and magnesium. This study aims to modify the surfaces of Ti-25Ta-10Zr-15Nb (TTZN1) and Ti-25Ta-20Zr-30Nb (TTZN2) alloys via micro-arc oxidation incorporating Ca, P, and Mg elements. The chemical composition results indicated that the MAO treatment was effective in incorporating the elements Ca (9.5 ± 0.4 %atm), P (5.7 ± 0.1 %atm), and Mg (1.1 ± 0.1 %atm), as well as the oxidized layer formed by micropores that increases the surface roughness (1160 nm for the MAO layer of TTZN1, 585 nm for the substrate of TTZN1, 1428 nm for the MAO layer of TTZN2, and 661 nm for the substrate of TTZN2). Regarding the phases formed, the films are amorphous, with low crystallinity (4 and 25% for TTZN2 and TTZN1, respectively). Small amounts of anatase, zirconia, and calcium carbonate were detected in the Ti-25Ta-10Zr-15Nb alloy.

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Section: Introductionmentioning

confidence: 99%

Surface Characterization of New β Ti-25Ta-Zr-Nb Alloys Modified by Micro-Arc Oxidation

2023

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“…In this scenario, β-titanium alloys (β-Ti) with low elastic modulus and free of toxic elements in their chemical composition 12,13 , like niobium (Nb), zirconium (Zr), and tantalum (Ta), have been developed for application as biomaterials, considering that β-Ti alloys present good corrosion resistance and better biological and mechanical compatibility when compared to the commercial alloys currently used [14][15][16][17][18][19][20] .…”

Section: Introductionmentioning

confidence: 99%

Influence of Hot Rolling on β Ti-Nb-Zr(-Ta) Multiprincipal Alloys for Biomedical Application

Santos,

Kuroda,

Reis

et al. 2023

Mat. Res.

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With increasing life expectancy, revision surgeries have become more frequent in implanted people. This is due to the biological and biomechanical incompatibility that generates, among others, problems such as stress shielding. This works aims to analyze the influence of the hot rolling process (HR sample) on the microstructure and, consequently, the properties of β-Ti multiprincipal alloys: Ti-27Nb-39Zr (39Zr), Ti-30Nb-50Zr (50Zr), and Ti-20Nb-30Zr-13Ta (30Zr) (wt. %.) (equimassic and with high content of β-stabilizer elements). All samples were subjected to characterization through X-ray diffraction (XRD) to determine the phases present, and optical microscopy (OM) and scanning electronic microscopy (SEM) were realized to characterize the microstructure and confirm the phases obtained through XRD. Before hot rolling, only the β phase was identified, but in the HR condition, the α and β phases were identified. Consequently, it did not observe significant changes in microhardness for all alloys, while the elastic modulus was observed with a reduction of 23% for 39Zr, 46% for 40Zr, and 13% for 30Zr. The hot rolling processing was confirmed to be a helpful route to reduce the elastic modulus for β Ti multiprincipal alloys opening perspectives for applying such alloys as metallic implant materials.

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“…In this context, β-Ti alloys are of interest due to their low elastic modulus and excellent biocompatibility 1,2 . Stress shielding is one of the mechanical problems associated with the difference in the values of the elastic modulus between the prosthesis material and the bone tissue [4][5][6][7] . In this case, this property value difference results in an uneven distribution of the mechanical stress, with most of the stress being directed toward the metal alloy.…”

Section: Introductionmentioning

confidence: 99%

Influence of Zr Content in Ti-40Nb-xZr Alloys on the Microstruture, Elastic Modulus and Microhardness

Santos,

Reis,

Afonso

2023

Mat. Res.

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In recent years, there has been a growing interest in the search for metallic alloys with favorable mechanical and chemical characteristics that elicit a positive biological response. Among these alloys, β-Ti alloys have attracted significant attention due to their low elastic modulus and excellent biocompatibility. The addition of Nb contributes to stabilizing the β phase at room temperatures, leading to the transformation of β into β + α (β-isomorph). Additionally, despite Zr being commonly considered a neutral element, it can exhibit a β-stabilizing characteristic when combined with betagenic elements. Both Nb and Zr have been shown to effectively increase the lattice parameter of the β phase, which is advantageous for reducing the elastic modulus. The primary objective of this study was to characterize β-Ti alloys within the Ti-Nb-Zr system, specifically Ti-40Nb-20Zr, Ti-40Nb-30Zr, and Ti-40Nb-40Zr (wt.%) produced via arc furnace casting. The study aimed to investigate the influence of the proportion of β-stabilizing or betagenic elements on the microstructure and properties of the alloys, including Vickers microhardness and elastic modulus.

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Assessment of anodization conditions and annealing temperature on the microstructure, elastic modulus, and wettability of β-Ti40Nb alloy

Cited by 12 publications

References 67 publications

Surface Characterization of New β Ti-25Ta-Zr-Nb Alloys Modified by Micro-Arc Oxidation

Surface Characterization of New β Ti-25Ta-Zr-Nb Alloys Modified by Micro-Arc Oxidation

Influence of Hot Rolling on β Ti-Nb-Zr(-Ta) Multiprincipal Alloys for Biomedical Application

Influence of Zr Content in Ti-40Nb-xZr Alloys on the Microstruture, Elastic Modulus and Microhardness

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