Difference of Wear Behavior between Ti‐29Nb‐13Ta‐4.6Zr Alloy and Ti‐6Al‐4V ELI Alloy for Biomedical Applications

Nakai, Masaaki; Niinomi, Mitsuo; Hieda, Junko; Cho, Ken; Lee, Yoon Seok

doi:10.1002/9781118889879.ch29

Cited by 2 publications

(4 citation statements)

References 4 publications

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“…Fig. 3 shows the wear tracks on the Ti64 and TNTZ discs after the friction wear tests [12]. The tracks on the Ti64 disc show continuous uniform microcuttings, indicative of abrasion (Figs.…”

Section: Resultsmentioning

confidence: 99%

Effect of Subsurface Deformation on Sliding Wear Behavior of Ti-29Nb-13Ta-4.6Zr Alloys for Biomedical Applications

Lee

Niinomi

Nakai

et al. 2014

KEM

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The wear mechanisms of conventional Ti–6Al–4V extra-low interstitial (Ti64) and the new Ti–29Nb–13Ta–4.6Zr (TNTZ) were studied to investigate the wear properties of Ti64/TNTZ for application in spinal fixation devices. Ti64 and TNTZ balls and discs were first prepared as wear-test specimens. A ball-on-disc frictional wear-testing machine was used in air to perform the frictional wear tests of the Ti64 and TNTZ discs mated against Ti64 and TNTZ balls. The wear mechanisms were investigated using a scanning electron microscopy to analyze the worn surfaces and wear debris. The volume losses for the TNTZ discs were larger than those for the Ti64 ones, regardless of the mating ball material. Furthermore, the morphologies of the wear tracks and the debris of the Ti64 and TNTZ discs were different, suggesting that the wear mechanisms for the Ti64 and TNTZ discs were abrasive and delamination wear caused by mild and severe subsurface deformations of the Ti64 and TNTZ, respectively, regardless of the mating ball material.

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Section: Resultsmentioning

confidence: 99%

Effect of Subsurface Deformation on Sliding Wear Behavior of Ti-29Nb-13Ta-4.6Zr Alloys for Biomedical Applications

Lee

Niinomi

Nakai

et al. 2014

KEM

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“…According to wear track observations shown in Fig. 7.6 [27], continuous uniform groove and micro cutting, indicative of abrasion, and oxide debris are observed on the worn surface of Ti-6Al-4V ELI alloy. On the other hand, severe plowing, massive surface deformation, many cracks, and some traces of spalling in the form of platelets, indicative of delamination, are observed on the worn surface of Ti-29Nb-13Ta-4.6Zr alloy.…”

Section: Low Young's Modulusmentioning

confidence: 99%

“…This is made possible by the phenomenon of deformation-induced Fig. 7.6 Scanning electron micrographs of worn surfaces of a β-type titanium alloy with low Young's modulus (Ti-29Nb-13Ta-4.6Zr alloy (mass%) (TNTZ)) and a conventional (α + β)-type titanium alloy (Ti-6Al-4V ELI alloy (mass%) (Ti64)) after ball-on-disc wear tests; (a) Ti64 disc against Ti64 ball, (b) TNTZ disc against Ti64 ball, (c) Ti64 disc against TNTZ ball, and (d) TNTZ disc against TNTZ ball [27] ω-phase transformation localized within the deformed part of the material, which provides an opportunity to satisfy the conflicting requirement in terms of Young's modulus. Figure 7.7 [31] shows the Young's moduli of β-type Ti alloys, Ti-12Cr alloy with self-tunable Young's modulus and Ti-29Nb-13Ta-4.6Zr alloy with low Young's modulus, after being subjected to solution treatment and cold rolling.…”

Section: Self-tunable Young's Modulusmentioning

confidence: 99%

“…Furthermore, introducing a small amount of ceramics such as TiB and Y 2 O 3 to the β-phase matrix is also effective to improve the fatigue strength of β-type Ti alloys [21,25]. [21] Ti-6Al-4V ELI alloy and Ti-29Nb-13Ta-4.6Zr alloy was investigated [26,27]. Volume loss of Ti-29Nb-13Ta-4.6Zr alloy was larger than that of Ti-6Al-4V ELI alloy for both discs and balls (mating materials) in the ball-on-disc type wear testing as shown in Fig.…”

Section: Low Young's Modulusmentioning

confidence: 99%

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Enhancing Functionalities of Metallic Materials by Controlling Phase Stability for Use in Orthopedic Implants

Nakai

Niinomi

Cho

et al. 2015

Interface Oral Health Science 2014

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This chapter aims to review the recent trends pertaining to the enhanced functionalities, including low Young's modulus, self-tunable Young's modulus, and low magnetic susceptibility, of titanium and zirconium alloys for use in orthopedic implants. These value-added functionalities can be realized by controlling the type of crystal structure and their lattice structure stabilities, which are related to the phase stability of titanium and zirconium alloys. Keywords Magnetic susceptibility • Metallic materials • Orthopedic implant • Phase stability • Young's modulus IntroductionOne of the most important factors concerning the use of orthopedic implants is to ensure safety in usage, which is often associated with their mechanical reliability to endure physiologically cyclic loading and unexpected large loads during treatment. Given these considerations, metallic materials are advantageous over ceramic and polymeric materials for use as implantable materials. Therefore, more than 80 % of the implant devices used till date are made of metallic materials [1]. Another important factor concerning the use of orthopedic implants is their toxicity toward living tissues. In general, the human body inherently resists any incoming toxic element. In other words, human body exhibits low permittivity to highly toxic elements eluted from orthopedic implants [2]. That is, the toxicity of orthopedic implants depends not only on the nature of the metallic elements but also on the amount of them, which, in turn, strongly depends on the corrosion resistance of each metallic material. Therefore, in the human body, a metallic material with high corrosion resistance is highly imperative to ensure their safe usage as orthopedic implants.

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Difference of Wear Behavior between Ti‐29Nb‐13Ta‐4.6Zr Alloy and Ti‐6Al‐4V ELI Alloy for Biomedical Applications

Cited by 2 publications

References 4 publications

Effect of Subsurface Deformation on Sliding Wear Behavior of Ti-29Nb-13Ta-4.6Zr Alloys for Biomedical Applications

Effect of Subsurface Deformation on Sliding Wear Behavior of Ti-29Nb-13Ta-4.6Zr Alloys for Biomedical Applications

Enhancing Functionalities of Metallic Materials by Controlling Phase Stability for Use in Orthopedic Implants

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