Elastic deformation behaviour of Ti–24Nb–4Zr–7.9Sn for biomedical applications

Hao, Yulin; Li, S.J.; Sun, Shumin; Zheng, Ce; Yang, Rui

doi:10.1016/j.actbio.2006.11.002

Cited by 469 publications

(206 citation statements)

References 28 publications

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“…4), the sixth cycle stress-strain curve in Fig. 5, and stress-strain curve of the same tensile sample tested 6 days after the cyclic deformation experiment, demonstrating partial recovery of incipient Young's modulus (Hao, Li, Sun, Zheng & Yang, 2007).…”

Section: Biomechanical Propertiesmentioning

confidence: 82%

“…By constructing a cluster containing a solute the bulk modulus of β-type titanium alloys can be estimated and the results for a series of Ti-TM (Fedotov, 1973). A schematic of the E vs. e/a plot for Ti-TM alloys is shown in (c) with the dotted curve indicating the intrinsic minimum in E of the β phase (Hao, Li, Sun, Zheng & Yang, 2007). (Song, Xu, Yang, Li, Wu & Guo, 1999).…”

Section: Primary Design Considerationsmentioning

confidence: 99%

“…Understanding of the elastic softening and recovery of Ti2448 is incomplete, but some clues to this extraordinary behaviour will be discussed in the next section. The effects of different heat treatment on the mechanical properties of Ti2448 have been systematically investigated (Hao, Li, Sun, Zheng & Yang, 2007). Solution treatment at high temperature has weak effect on superelasticity but causes the decrease of strength and slight increase of the incipient Young's modulus (by about 8 GPa).…”

Section: Biomechanical Propertiesmentioning

confidence: 99%

See 2 more Smart Citations

Development and Application of Low-Modulus Biomedical Titanium Alloy Ti2448

Yang¹,

Hao²,

Li³

2011

Biomedical Engineering, Trends in Materials Science

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Section: Biomechanical Propertiesmentioning

confidence: 82%

Section: Primary Design Considerationsmentioning

confidence: 99%

Section: Biomechanical Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Development and Application of Low-Modulus Biomedical Titanium Alloy Ti2448

Yang¹,

Hao²,

Li³

2011

Biomedical Engineering, Trends in Materials Science

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“…It was forged at 1123 K into a bar with 55 mm in diameter and then rolled at 1073 K into a bar with 12 mm in diameter. The asrolled alloy has a single β phase microstructure with an average grain size of~5 μm and sub-grain size of~0.6 μm as well as a nanoscale Nb modulation with the domain size of 2-3 nm [20,24]. Three kinds of V-type circumferential notch specimens ( Fig.…”

Section: Materials Preparationmentioning

confidence: 99%

Weak fatigue notch sensitivity in a biomedical titanium alloy exhibiting nonlinear elasticity

et al. 2017

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It is well known that metallic materials exhibit worse fatigue damage tolerance as they behave stronger in strength and softer in modulus. This raises concern on the long term safety of the recently developed biomechanical compatible titanium alloys with high strength and low modulus. Here we demonstrate via a model alloy, Ti-24Nb-4Zr-8Sn in weight percent, that this group of multifunctional titanium alloys possessing nonlinear elastic deformation behavior is tolerant in fatigue notch damage. The results reveal that the alloy has a high strength-to-modulus (σ/E) ratio reaching 2% but its fatigue notch sensitivity (q) is low, which decreases linearly from 0.45 to 0.25 as stress concentration factor increases from 2 to 4. This exceeds significantly the typical relationship between σ/E and q of other metallic materials exhibiting linear elasticity. Furthermore, fatigue damage is characterized by an extremely deflected mountain-shape fracture surface, resulting in much longer and more tortuous crack growth path as compared to these linear elastic materials. The above phenomena can be explained by the nonlinear elasticity and its induced stress relief at the notch root in an adaptive manner of higher stress stronger relief. This finding provides a new strategy to balance high strength and good damage tolerance property of metallic materials.

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“…12,13 Considerable efforts have been devoted to exploring novel b-titanium alloys by addition of d-electron-rich elements such as Mo and Nb to stabilize b phase at low temperature. 12,14 In a or (a + b) titanium alloys, thus far, the transformed b phase from the a phase has not been found in most of the ambient temperature experiments, except a recent report showing a high pressure (>67 GPa)-induced a-to-b phase transition in an aged Ti-15Mo-3Nb-3Al-0.2Si alloy. 15 However, why and how this phase transition takes place have not been studied.…”

mentioning

confidence: 99%

Deformation-induced ambient temperature α-to-β phase transition and nanocrystallization in (α + β) titanium alloy

Han

Zhuang

2009

J. Mater. Res.

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Ambient temperature a-to-b phase transition and nanocrystallization in the aged Ti-25Nb-3Mo-3Zr-2Sn titanium alloy was achieved by surface mechanical attrition treatment (SMAT). The phase transition occurs at a/b interfaces and extends to a phase interiors with increasing strain. It is irreversible and diffusion controlled. The stressinduced increase of Gibbs energy and enrichment of Nb may cause a high order of lattice instability of the a phase adjacent to the a/b interfaces and compel the a phase to b phase. The presence of fine a needles in the aged alloy and the phase transition from a to b with increasing strain are viewed to play a crucial role in the subsequent nanostructuring.

show abstract

Elastic deformation behaviour of Ti–24Nb–4Zr–7.9Sn for biomedical applications

Cited by 469 publications

References 28 publications

Development and Application of Low-Modulus Biomedical Titanium Alloy Ti2448

Development and Application of Low-Modulus Biomedical Titanium Alloy Ti2448

Weak fatigue notch sensitivity in a biomedical titanium alloy exhibiting nonlinear elasticity

Deformation-induced ambient temperature α-to-β phase transition and nanocrystallization in (α + β) titanium alloy

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