Mechanical Properties, Corrosion Behavior, and In Vitro Cell Studies of the New Ti-25Ta-25Nb-5Sn Alloy

Silva, Kerolene Barboza da; Carobolante, João Pedro Aquiles; Rajan, S. Sudhagara; Júnior, Celso Bortolini; Sabino, Roberta M.; Seixas, Maurício Rangel; Nakazato, Roberto Zenhei; Popat, Ketul C.; Claro, Ana Paula Rosifini Alves

doi:10.3390/ma16051970

Cited by 2 publications

(6 citation statements)

References 43 publications

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“…The Ti-25Ta-25Nb-3Sn experimental alloy was obtained from sheets of titanium (grade 2), tantalum (99.99%), niobium (99.99%), and tin (99.99%). The methodology used in the processing was based on our previous studies with this alloy [14,17,18]. During melting, ingots were melted and re-melted at least ten times due to the difference between the melting point of these materials.…”

Section: Methodsmentioning

confidence: 99%

“…To stabilize the β phase, the bars were solution-treated in a vacuum furnace at 900 • C for 2 h followed by water quenching. Warm ECAP was added to the already studied processing route [14,17,18] to change the grain size of the alloy.…”

Section: Methodsmentioning

confidence: 99%

“…Recently, Silva et al ( 2023) verified the effects of adding 5%w of Sn, confirming better results for Ti-25Nb-25Ta-3Sn alloy. In the present work, the alloys processed with ECAP were compared with the cast alloy [18].…”

Section: Graph Xrd1mentioning

confidence: 99%

“…These results have led to an increased interest in studies in this area. Some promising alloys developed recently include: Ti-Mo-Nb [4,7,8], Ti-Mo-Nb-Zr [3,9], Ti-Nb-Cu [10], Ti-Zr-Nb [11], Ti-Nb-Sn [12], Ti-Nb-Ta [13,14], Ti-Nb-Zr-Mn-Sn [15], Ti-Mo-Nb-O [16], Ti-Nb-Zr-Ta [16], Ti-Nb-Zr-Ta-Sn [1], and Ti-Ta-Nb-Sn [17,18].…”

Section: Introductionmentioning

confidence: 99%

“…The addition of Sn to the Ti-25Ta-25Nb alloy was evaluated by Seixas (2018) and Silva (2023), and the authors reported an increase in mechanical strength and a decrease in Young's modulus [17,18]. The Ti25Ta25Nb3Sn alloy presented a UTS of 583 MPa, hardness of 193 HV, and modulus of 65 GPa, while the Ti-25Ta-25Nb-5Sn alloy presented a modulus of 85 GPa and hardness of 198 HV, more suitable results for biomedical applications in bone tissue compared to Ti-6Al-4V alloy, which has Young's modulus of 110 GPa and hardness of 184 HV.…”

Section: Introductionmentioning

confidence: 99%

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Processing of the Ti25Ta25Nb3Sn Experimental Alloy Using ECAP Process for Biomedical Applications

Bortolini,

Carobolante,

Timokhina

et al. 2023

JMMP

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The development of titanium-β alloys for biomedical applications is associated with the addition of alloying elements or the use of processing techniques to obtain suitable bulk properties. The Ti25Ta25Nb3Sn alloy has been highlighted for its mechanical properties and biocompatibility. To further enhance the properties of titanium alloys for biomedical applications, equal channel angular pressing (ECAP) was used due to its capability of refining the microstructure of the alloy, leading to improved mechanical properties without significant changes in Young’s modulus. This study aims to evaluate the impact of ECAP on the microstructure of the Ti-25Sn-25Nb-3Nb alloy and investigate the correlation between the microstructure, mechanical properties, and corrosive behavior. Grain refinement was achieved after four ECAP passes, with an average grain diameter of 395 nm and a non-homogeneous structure, and microhardness was slightly increased from 193 to 212 HV after four ECAP passes. The thermomechanical aspects of the ECAP processing have led to the formation of a metastable α″ phase during the first two passes, while after four passes, the structure was composed only of the β phase. The corrosion resistance of the alloy was increased after four passes, presenting the best results in terms of the improvement of passivation corrosion density.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Graph Xrd1mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Processing of the Ti25Ta25Nb3Sn Experimental Alloy Using ECAP Process for Biomedical Applications

Bortolini,

Carobolante,

Timokhina

et al. 2023

JMMP

Self Cite

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Analyzing the Sintering Kinetics of Ti12.5Ta12.5Nb Alloy Produced by Powder Metallurgy

Macias,

Garnica,

Fernandez-Salvador

et al. 2023

Metals

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The focus of this work is to analyze the sintering kinetics of Ti12.5Ta12.5Nb alloy by dilatometry. The mixture of powders was achieved by mixing individual powders of Ti, Ta and Nb, which were then axially pressed. Sintering was performed at 1260 °C using different heating rates. The microstructure was determined by X-ray diffraction and scanning electron microscopy. Results show that densification is achieved by solid state diffusion and that the relative density increased as the heating rate was slow. Due to the full solubility of Ta and Nb in Ti, the relative density reached was up to 93% for all samples. Activation energy was estimated from the densification rate and it was determined that two main diffusion mechanisms were predominant: grain boundary and lattice self-diffusion. This suggests that Ta and Nb diffusion did not affect the atomic diffusion to form the necks between particles. The microstructure shows a combination of α, β and α′, and α″ martensitic phases as a result of the diffusion of Ta and Nb into the Ti unit cell. It was concluded that the heating rate plays a major role in the diffusion of Ta and Nb during sintering, which affects the resulting microstructure.

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Mechanical Properties, Corrosion Behavior, and In Vitro Cell Studies of the New Ti-25Ta-25Nb-5Sn Alloy

Cited by 2 publications

References 43 publications

Processing of the Ti25Ta25Nb3Sn Experimental Alloy Using ECAP Process for Biomedical Applications

Processing of the Ti25Ta25Nb3Sn Experimental Alloy Using ECAP Process for Biomedical Applications

Analyzing the Sintering Kinetics of Ti12.5Ta12.5Nb Alloy Produced by Powder Metallurgy

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