Microstructure and Mechanical Properties of Ti-12Mo-8Nb Alloy Hot Swaged and Treated for Orthopedic Applications

The development of β-metastable titanium alloys that combine low Young's modulus, good mechanical properties, corrosion resistance and biocompatibility has attracted industry interest. This type of alloy is an alternative to commercial alloys such as Ti-6Al-4V, avoiding the cytotoxic effect that occurs with Al and V in the human body in the manufactured orthopedic prostheses. In this scenario, the present work aims to characterize the effect of Nb concentration in the properties of Ti alloys based on the Ti-12Mo-xNb stoichiometry (x = 0, 3, 8, 13, 17 and 20). All alloys were produced by arc melting with non-consumable tungsten electrode in an argon atmosphere and the ingots were characterized by x-ray diffraction (XRD), optical microscopy (OM), Vickers microhardness and Young's modulus was measured by impulse excitation and density was measured using the Archimedes' principle. The Ti-12Mo alloy and the Ti-12Mo-20Nb alloy showed the lowest Young's modulus. The best hardness/ modulus was found for the Ti-12Mo-3Nb alloy. All the alloys studied in this work showed hardness/ modulus ratio above the traditional Ti-6Al-4V alloy (2.85), presented great potential for the biomedical application.

show abstract

“…Dercza et al 29 obtained a Young's modulus value of 67 GPa for the single β phase in the Ti-70Ta alloy (Mo eq. =15.4wt.%).…”

Section: Resultsmentioning

confidence: 99%

“…Due to this characteristic its necessary to find the best relation between these two properties. For this reason, the hardness/ modulus ratio is often used to evaluate the mechanical performance of metallic biomaterials for implants 29 .…”

Section: Resultsmentioning

confidence: 99%

Mechanical and Microstructural Characterization of AS-CAST Ti-12Mo-xNb Alloys for Orthopedic Application

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…This elastic modulus value is substantially lower than the elastic moduli of Ti-Mo-Nb alloys reported in the literature. [17][18][19] Furthermore, Ti-11.1Mo-10.8Nb alloy possessed both lower elastic modulus and higher yield strength, which are also desirable for orthopaedic applications because of the large elastic recovery strain.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Effect of Nb glue atom in the cluster formula on the microstructure and mechanical properties of Ti-Mo alloy

Ranganya¹,

Moshokoa²,

Obadele

et al. 2022

SATNT

View full text Add to dashboard Cite

The effect of Nb in the glue site of the cluster-plus-glue atom model formula on the microstructure and mechanical properties of Ti-Mo alloy was investigated. Phase and microstructural analysis were performed by X-ray diffraction and electron backscatter diffraction. Tensile properties were also examined. A small amount of secondary martensitic α” and ωath nano particles were precipitated in the β matrix of both alloys, due to to the inhomogeneous distribution of Mo and/ or Nb caused by segregation, which formed local regions with high- and low-stability of the β phase. The elastic modulus was significantly reduced to 56.9 ± 3.08 GPa, while the elastic admissible strain was substantially improved. The increased β stability and suppression of the ωath phase led to no significant change in both the yield and ultimate tensile strengths, and the brittle fracture behavior. The alloy can be a potential alternative of the conventional orthopedic implant materials in orthopedic applications.

show abstract

“…Also, Karthega et al 16 , Oliveira et al 17 , and Zhou et al 18 showed that Ti-Mo alloys have excellent corrosion resistance against simulated body fluids 13 . Other studies have shown that Ti-Mo-Nb alloys presented good mechanical properties, corrosion resistance 19 – 21 , and adequate in-vitro biocompatibility 22 . Mo is also a strongly β-stabilizing element.…”

Section: Introductionmentioning

confidence: 98%

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

Cardoso

Almeida

Corrêa

et al. 2022

Sci Rep

View full text Add to dashboard Cite

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.

show abstract

Microstructure and Mechanical Properties of Ti-12Mo-8Nb Alloy Hot Swaged and Treated for Orthopedic Applications

Cited by 15 publications

References 34 publications

Mechanical and Microstructural Characterization of AS-CAST Ti-12Mo-xNb Alloys for Orthopedic Application

Mechanical and Microstructural Characterization of AS-CAST Ti-12Mo-xNb Alloys for Orthopedic Application

Effect of Nb glue atom in the cluster formula on the microstructure and mechanical properties of Ti-Mo alloy

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

Contact Info

Product

Resources

About