Low-modulus biomedical Ti–30Nb–5Ta–3Zr additively manufactured by Selective Laser Melting and its biocompatibility

Luo, Jiapeng; Sun, Jianfei; Huang, Yongjiang; Zhang, J.H.; Zhang, Y.D.; Zhao, Dapeng; Yan, Ming

doi:10.1016/j.msec.2018.11.077

Cited by 66 publications

(26 citation statements)

References 50 publications

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“…Fischer and Schwab [27,28] manufactured Ti-26Nb and Ti-45Nb with mixed and pre-alloyed powder to achieve the β phase. Trabecular structure made up of β-alloys Ti-24Nb-4Zr-8Sn and Ti-30Nb-5Ta-3Zr were investigated in [29,30], showing, however, that the footprint of α precipitation was not erased entirely. Tantalum (Ta) has been introduced even if it is a rare-earth and expensive metal, and 50 wt.% thereof is necessary to fully stabilize the β-phase in high cooling rate solidification [31].…”

Section: Introductionmentioning

confidence: 99%

A 3D-Printed Ultra-Low Young’s Modulus β-Ti Alloy for Biomedical Applications

et al. 2020

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The metastable β-Ti21S alloy is evaluated as a potential candidate for biomedical parts. Near fully dense (99.75 ± 0.02%) samples are additively manufactured (that is, 3D-printed) by laser powder-bed fusion (L-PBF). In the as-built condition, the material consists of metastable β-phase only, with columnar grains oriented along the building direction. The material exhibits an extremely low Young’s modulus (52 ± 0.3 GPa), which was never reported for this type of alloy. The combination of good mechanical strength (σy0.2 = 709 ± 6 MPa, ultimate tensile strength (UTS) = 831 ± 3 MPa) and high total elongation during tensile test (21% ± 1.2%) in the as-built state, that is, without any heat treatment, is close to that of the wrought alloy and comparable to that of heat treated Ti grade 5. The good biocompatibility attested by cytotoxicity tests confirms its great suitability for biomedical applications.

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Section: Introductionmentioning

confidence: 99%

A 3D-Printed Ultra-Low Young’s Modulus β-Ti Alloy for Biomedical Applications

et al. 2020

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“…2) show a single-phase β structure. In previous work, a Ti-30Nb-5Ta-3Zr (wt%) alloy processed by L-PBF has been found to consist of the β phase and a minor fraction of αʺ martensite [40]. This finding can be explained by the lower amount of β stabilizing elements ([Mo] eq = 9.3), especially a lower Nb content, than in the present TNZT alloy.…”

Section: Phase Constitution and Microstructural Characterizationmentioning

confidence: 40%

Microstructure and properties of TiB2-reinforced Ti–35Nb–7Zr–5Ta processed by laser-powder bed fusion

Batalha

Pinotti

Alnoaimy

et al. 2021

Journal of Materials Research

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The Ti–35Nb–7Zr–5Ta (wt%, TNZT) alloy was reinforced with TiB2 and synthesized by L-PBF. The relatively small TiB2 particles change the solidification structure from cellular to columnar-dendritic and lead to submicron TiB precipitation in the β matrix. This results in pronounced grain refinement and reduction of texture. However, the microstructure of the additively manufactured TNZT-TiB2 is still different from the as-cast, unreinforced TNZT, which contains equiaxed and randomly oriented grains. The β phase is less stable in the as-cast samples, leading to stress-induced martensitic transformation and recoverable strain of 1.5%. The TNZT with 1 wt% of TiB2 presents significantly higher compressive strength (σYS = 495 MPa) compared to unreinforced samples (σYS = 430 MPa), without sacrificing ductility or altering Young’s modulus (E ≈ 46 GPa). The addition of a small fraction of TiB2 to the TNZT alloy synthesized by L-PBF is a promising alternative for manufacturing sophisticated components for biomedical applications. Graphical abstract

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“…According to the results from the literature, the measured fatigue limit is lower than the counterpart of as-forged + solution treated Ti–29Nb–13Ta–4.6Zr (320 MPa) 46 but remains on the same level as that of as-SLMed Ti–30Nb–5Ta–3Zr (140 MPa) obtained using pre-alloyed feedstock. 44 Here, the improvement of the fatigue limit of the TNT5Zr alloy manufactured using SLM is discussed. First, microstructure tailoring to enhance the strength and ductility of the material can be considered.…”

Section: Discussionmentioning

confidence: 99%

Microstructural Evolution, Mechanical Properties, and Preosteoblast Cell Response of a Post-Processing-Treated TNT5Zr β Ti Alloy Manufactured via Selective Laser Melting

Kong

Cox

et al. 2022

ACS Biomater. Sci. Eng.

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A Ti–34Nb–13Ta–5Zr (TNT5Zr) β Ti alloy with a high strength-to-modulus ratio has been developed, showing its potential to become another candidate material in load-bearing implant applications. This work mainly investigates the microstructural evolution, mechanical properties, and biocompatibility of a post-processing-treated TNT5Zr alloy manufactured via selective laser melting (SLM). Transmission electron microscopy observation shows the existence of the single beta grain matrix and alpha precipitates along the grain boundary in the SLM + HIP manufactured TNT5Zr alloy (TNT5Zr-AF + HIP), and ellipsoidal nano-sized intragranular α″ precipitates (approx. 5–10 nm) were introduced after the subsequent low-temperature aging treatment. The precipitation strengthening enables the SLM + HIP + aging manufactured TNT5Zr (TNT5Zr-AF + HIPA) alloy to show a comparable ultimate tensile strength (853 ± 9 MPa) to that of the reference material (Ti64-AF + HIP, 926 ± 23 MPa). Including the inferior notch-like surface of the test pieces, the slip-band cracking that occurs in this ductile TNT5Zr-AF + HIPA alloy is regarded as the main factor in determining its fatigue strength (170 MPa). In vitro short-term biocompatibility evaluation reveals almost no significant difference in the preosteoblast viability, differentiation, and mineralization between TNT5Zr-AF + HIPA and the reference biomaterial (Ti64-AF + HIP).

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Low-modulus biomedical Ti–30Nb–5Ta–3Zr additively manufactured by Selective Laser Melting and its biocompatibility

Cited by 66 publications

References 50 publications

A 3D-Printed Ultra-Low Young’s Modulus β-Ti Alloy for Biomedical Applications

A 3D-Printed Ultra-Low Young’s Modulus β-Ti Alloy for Biomedical Applications

Microstructure and properties of TiB2-reinforced Ti–35Nb–7Zr–5Ta processed by laser-powder bed fusion

Microstructural Evolution, Mechanical Properties, and Preosteoblast Cell Response of a Post-Processing-Treated TNT5Zr β Ti Alloy Manufactured via Selective Laser Melting

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