Elastoplastic properties of a low-modulus titanium-based β alloy

Бетехтин, В. И.; Kolobov, Yu. R.; Голосова, О. А.; Kardashev, B. K.; Кадомцев, А. Г.; Narykova, M. V.; Иванов, М. Б.; Vershinina, T. N.

doi:10.1134/s1063784213100046

Cited by 12 publications

(2 citation statements)

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“…This is a serious obstacle that limits the use of NiTi SMAs for the development and manufacture of bone implants. Therefore, when developing implants, scholars turn to nickel-free SMAs [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

On Structural Sensitivity of Young’s Modulus of Ni-Rich Ti-Ni Alloy

Рыклина

Murygin

Komarov

et al. 2023

Metals

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When developing bone implants, Young’s modulus is one of the primary characteristics of the material that should be considered. This study focuses on regulating the modulus of Ti-50.8 at.% Ni alloy by varying the grain/subgrain size as well as the initial structure using subsequent aging at 430 °C for 10 h. After post-deformation annealing (PDA), the temperature dependence of Young’s modulus exhibits a pronounced V-shaped character with a minimum at the onset temperature of the forward martensitic transformation, Ms, regardless of the structure. The grain/subgrain size of B2-austenite strongly affects the modulus magnitude. This effect is ambiguous for a material with a grain size range of 0.13–3 µm and depends on the test temperature. The effect of aging on the modulus reduction depends on the initial structure; it is most pronounced in an alloy with a relatively coarse grain size of 9 µm and brings a decrease of 3.8 times at a temperature of 37 °C. Aging of the initially recrystallized Ni-rich NiTi alloy makes it possible to obtain a вone-like elastic modulus of E = 12–13 GPa at an operating temperature of 37 °C. An ultrafine-grained substructure exhibits the same Young’s modulus values in the low temperature range from −100 to 25 °C.

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Section: Introductionmentioning

confidence: 99%

On Structural Sensitivity of Young’s Modulus of Ni-Rich Ti-Ni Alloy

Рыклина

Murygin

Komarov

et al. 2023

Metals

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“…Currently, bone implants made of metals and their alloys are widely used in orthopedics and dentistry. Due to the combination of bioinertness, strength, and low density [1][2][3], titanium and its alloys are commonly used for implant applications [4]. Titanium alloy Ti-6Al-4V is the predominant material for implant production because it combines corrosion resistance and high mechanical properties; however, this alloy contains cytotoxic elements Al and V, which can cause allergic reactions in the body tissues or a general toxic effect on the human organism [5].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Biocompatible Coatings Produced by Plasma Electrolytic Oxidation on cp-Ti and Ti-Zr-Nb Superelastic Alloy

et al. 2021

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The paper compares the coatings produced by plasma electrolytic oxidation (PEO) on commercially pure titanium and a novel superelastic alloy Ti-18Zr-15Nb (at. %) for implant applications. The PEO coatings were produced on both alloys in the identical pulsed bipolar regime. The properties of the coatings were examined using scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy-dispersive X-ray spectroscopy (EDX), potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS). The PEO process kinetics was modeled based on the Avrami theorem and Cottrell equation using a relaxation method. The resultant coatings contain TiO2, for both alloys, and NbO2, Nb2O5, ZrO2 for Ti-18Zr-15Nb alloy. The coating on the Ti-18Zr-15Nb alloy has a higher thickness, porosity, and roughness compared to that on cp-Ti. The values of the kinetic coefficients of the PEO process—higher diffusion coefficient and lower time constant for the processing of Ti-18Zr-15Nb—explain this effect. According to the electrochemical studies, PEO coatings on Ti-18Zr-15Nb alloy provide better corrosion protection. Higher corrosion resistance, porosity, and roughness contribute to better biocompatibility of the PEO coating on Ti-18Zr-15Nb alloy compared to cp-Ti.

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