Laser deposition and deformation behavior of Ti–Nb–Zr–Ta alloys for orthopedic implants

Nag, S.; Banerjee, Rajarshi

doi:10.1016/j.jmbbm.2012.08.014

Cited by 23 publications

(3 citation statements)

References 23 publications

(29 reference statements)

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“…LDED has already been explored to generate parts of cp-Ti and titanium alloys [ 31 , 32 , 33 , 34 ], such as improved cp-Ti ingots for dental prosthetic applications [ 36 ]; porous Ti parts [ 42 , 43 ]; Ti-6Al-4V scaffolds [ 44 ]; or biocompatible β type Ti-Nb [ 37 , 45 , 46 , 47 ], and Ti-Zr-Nb [ 37 ], and Ti-35Nb-7Zr-5Ta (wt%) [ 48 , 49 , 50 ]. Laser-deposited β type Ti alloys consist of a single metastable β-phase because of the high cooling speed achieved during the process [ 37 , 45 , 46 , 48 , 49 , 50 ]. It also has been reported that β type Ti alloys generated by LDED exhibit vertical columnar β grains [ 37 , 46 ].…”

Section: Introductionmentioning

confidence: 99%

Laser-Deposited Beta Type Ti-42Nb Alloy with Anisotropic Mechanical Properties for Pioneering Biomedical Implants with a Very Low Elastic Modulus

et al. 2022

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Present commercial titanium alloy implants have an elastic modulus higher than 100 GPa, whereas that of the cortical bone is much smaller (17–28 GPa). This elastic modulus mismatch produces a stress shielding effect and the resorption of the bone surrounding the implant. In the present work, a <100> fiber texture is developed in β type Ti-42Nb (wt%) alloy ingots generated by laser-directed energy deposition (LDED) in order to achieve anisotropic mechanical properties. In addition, we demonstrate that laser-deposited β type Ti‑42Nb alloy ingots with an intense <100> fiber texture exhibit a very low elastic modulus in the building direction (Ez < 50 GPa) and high yield (σ0.2z > 700 MPa) and tensile (UTSz > 700 MPa) strengths. Laser-deposited Ti-42Nb alloy enhances the osteoinductive effect, promoting the adhesion, proliferation, and spreading of human osteoblast-like cells. Hence, we propose that laser-deposited β type Ti-42Nb alloy is a potentially promising candidate for the manufacturing of pioneering biomedical implants with a very low elastic modulus that can suppress stress shielding.

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Section: Introductionmentioning

confidence: 99%

Laser-Deposited Beta Type Ti-42Nb Alloy with Anisotropic Mechanical Properties for Pioneering Biomedical Implants with a Very Low Elastic Modulus

et al. 2022

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“…Since Laser Directed Energy Deposition can deliver feedstock material in the form of particles, it allows the flexibility to deposit blends of elemental powders to produce custom alloy components in situ. LDED with elemental powders as feedstock materials has been used to generate in-situ biomedical β-type Ti alloys, such as Ti-35Nb-7Zr-5Ta (wt%) [39][40][41] and Ti-26Nb (at%) [42]. However, the in-situ Laser Directed Energy Deposition of these alloys is a challenge because of the relatively high melting points of Nb (2750 K) and Ta (3290 K).…”

Section: Introductionmentioning

confidence: 99%

In-Situ Laser Directed Energy Deposition of Biomedical Ti-Nb and Ti-Zr-Nb Alloys from Elemental Powders

González

Contreras

Punset

et al. 2021

Metals

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In order to achieve the required properties of titanium implants, more resources and research are needed to turn into reality the dream of developing the perfect implant material. The objective of this study was to evaluate the viability of the Laser Directed Energy Deposition to produce biomedical Ti-Nb and Ti-Zr-Nb alloys from elemental powders (Ti, Nb and Zr). The Laser Directed Energy Deposition is an additive manufacturing process used to build a component by delivering energy and material simultaneously. The material is supplied in the form of particles or wire and a laser beam is employed to melt material that is selectively deposited on a specified surface, where it solidifies. Samples with different compositions are characterized to analyze their morphology, microstructure, constituent phases, mechanical properties, corrosion resistance and cytocompatibility. Laser-deposited Ti-Nb and Ti-Zr-Nb alloys show no relevant defects, such as pores or cracks. Titanium alloys with lower elastic modulus and a significantly higher hardness than Ti grade 2 were generated, therefore a better wear resistance could be expected from them. Moreover, their corrosion resistance is excellent due to the formation of a stable passive protective oxide film on the surface of the material; in addition, they also possess outstanding cytocompatibility.

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“…Por exemplo, a liga de titânio com 6 % em peso de tântalo apresenta 43 GPa no módulo de elasticidade, a medida que aumentando o percentual de tântalo para 13 %, o módulo assume valor de 60 GPa26 . Quanto ao zircônio é considerado isomorfo em ambas fases do titânio, porém, como 4V e possuem módulo de elasticidade inferior a 100 GPa5,10,25,26,76,88,90,91,92,93 .Porém, com os progressos na técnica BE já é possível produzir produtos com 99 % da densidade teórica por meio da utilização de pós hidrogenados95 .A hidrogenação consiste em etapa de saturação de átomos de hidrogênio na rede cristalina do material por meio de aquecimento controlado. Os particulados de hidretos são obtidos por cominuição (gerando uma larga distribuição dos particulados) ou processo de moagem (obtém um controle maior da distribuição do particulado).…”

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Obtenção e caracterização de ligas à base de Ti-Nb-Zr-(Ta) processadas por metalurgia do pó para aplicação como biomaterial

Mendes¹

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pela oportunidade da realização do curso de pós-graduação em nível de Doutorado no Programa de Pós-Graduação em Tecnologia Nuclear-Materiais. Ao Dr. Hidetoshi Takiishi, meu orientador, pela confiança depositada, pela compreensão e tempo despendido em discussões que valorizaram esse trabalho. À Dr a. Ana Helena de Almeida Bressiani, minha co-orientadora, pela acolhida no IPEN e direcionamento ao grupo de pesquisa para desenvolvimento deste trabalho, pelas inúmeras conversas, discussões, críticas e valiosas sugestões que conduziram para concretização deste doutorado. Ao órgão de fomento, CAPES, pela bolsa concedida nos primeiros meses de trabalho.

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Laser deposition and deformation behavior of Ti–Nb–Zr–Ta alloys for orthopedic implants

Cited by 23 publications

References 23 publications

Laser-Deposited Beta Type Ti-42Nb Alloy with Anisotropic Mechanical Properties for Pioneering Biomedical Implants with a Very Low Elastic Modulus

Laser-Deposited Beta Type Ti-42Nb Alloy with Anisotropic Mechanical Properties for Pioneering Biomedical Implants with a Very Low Elastic Modulus

In-Situ Laser Directed Energy Deposition of Biomedical Ti-Nb and Ti-Zr-Nb Alloys from Elemental Powders

Obtenção e caracterização de ligas à base de Ti-Nb-Zr-(Ta) processadas por metalurgia do pó para aplicação como biomaterial

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