Effect of Nb content on the microstructure and mechanical properties of binary Ti-Nb alloys

Fikeni, Lusanda; Annan, Kofi Ahomkah; Mutombo, Kalenda; Machaka, Ronald

doi:10.1016/j.matpr.2020.05.315

Cited by 31 publications

(16 citation statements)

References 22 publications

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“…Strength and elastic modulus decreased as the content of the β phase increased. 158 Borgman et al studied the influence of Nb composition of 10, 20, and 30 wt% of Ti-Nb binary system. 10 wt% Nb contained α and α ′′ phases.…”

Section: Effect Of Nbmentioning

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: Effect Of Nbmentioning

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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“…Xu et al . 19 studied the Ti-15Mo-xNb system alloys and also obtained an increase in the microhardness value of the alloy with 10% of Nb, which can be caused by the formation of ω phase, which makes the material harder and brittle 36 – 38 . With the addition of 20% and 30% Nb, there is a reduction in the microhardness values to 330 HV and 200 HV, respectively.…”

Section: Resultsmentioning

confidence: 99%

Preparation and characterization of novel as-cast Ti-Mo-Nb alloys for biomedical applications

Cardoso

Almeida

Corrêa

et al. 2022

Sci Rep

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Ti and its alloys are the most used metallic biomaterials devices due to their excellent combination of chemical and mechanical properties, biocompatibility, and non-toxicity to the human body. However, the current alloys available still have several issues, such as cytotoxicity of Al and V and high elastic modulus values, compared to human bone. β-type alloys, compared to α-type and (α + β)-type Ti alloys, have lower elastic modulus and higher mechanical strength. Then, new biomedical β-type alloys are being developed with non-cytotoxic alloying elements, such as Mo and Nb. Therefore, Ti-5Mo-xNb system alloys were prepared by argon arc melting. Chemical composition was evaluated by EDS analysis, and the density measurements were performed by Archimedes' method. The structure and microstructure of the alloys were obtained by X-ray diffraction and optical and scanning electron microscopy. Microhardness values were analyzed, and MTT and crystal violet tests were performed to assess their cytotoxicity. As the Nb concentration increases, the presence of the β-Ti phase also grows, with the Ti-5Mo-30Nb alloy presenting a single β-Ti phase. In contrast, the microhardness of the alloys decreases with the addition of Nb, except the Ti-5Mo-10Nb alloy, which has its microhardness increased probably due to the ω phase precipitation. Biological in-vitro tests showed that the alloys are not cytotoxic.

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“…Niobium (Nb), zirconium (Zr) and tantalum (Ta) are among the common biocompatible β-stabilizers that can maintain the β phase of Ti alloys at room and body temperatures [8,[12][13][14]. Fabrication and characterization of these β-stabilized Ti alloys have been reported by many studies as Ti-Mo [12,15], Ti-Nb [16][17][18], Ti-Ta [19] and Ti-Nb-Zr [20]. However, Nb has shown greater potential than the other alloys as an effective and biocompatible material that is also more affordable [8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nb Content and water quenching on microstructure and mechanical properties of Ti-Nb alloys fabricated by spark plasma sintering

et al. 2022

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Titanium-niobium (Ti-Nb) alloys have been extensively studied for medical implants due to their advantageous mechanical properties and biocompatibility. However, the stress shielding effect remains a challenge. This research investigated the effects of Nb content and enhancement of α ′′ formation on the mechanical properties of Ti-xNb alloys (x = 0, 5, 15 and 25%) fabricated by spark plasma sintering. Water quenching from the β phase induced α ′′ phase formation in Ti-5Nb and Ti-15Nb samples, thereby reducing their Young's modulus values but was not observed in commercially pure titanium (CP-Ti) and Ti-25Nb. Results showed that heat treatment with water quenching induced α ′′ phase formation and can be used to tailor the properties of Ti-Nb alloys fabricated by SPS. This technique can also be used to enhance material ductility at high β-stabilizer content, as observed in Ti-25Nb samples.

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Effect of Nb content on the microstructure and mechanical properties of binary Ti-Nb alloys

Cited by 31 publications

References 22 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

Preparation and characterization of novel as-cast Ti-Mo-Nb alloys for biomedical applications

Effect of Nb Content and water quenching on microstructure and mechanical properties of Ti-Nb alloys fabricated by spark plasma sintering

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