Microstructures and mechanical properties of metastable β TiNbSn alloys cold rolled and heat treated

Matsumoto, Hiroaki; Watanabe, Sadao; Hanada, Shuji

doi:10.1016/j.jallcom.2006.08.267

Cited by 180 publications

(130 citation statements)

References 19 publications

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“…7.1 [6]. Given this consideration, several studies have focused on the reduction of the Young's modulus of β-type Ti alloys closer to that of the bone [7][8][9][10][11][12][13].…”

Section: Low Young's Modulusmentioning

confidence: 99%

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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“…7.1 [6]. Given this consideration, several studies have focused on the reduction of the Young's modulus of β-type Ti alloys closer to that of the bone [7][8][9][10][11][12][13].…”

Section: Low Young's Modulusmentioning

confidence: 99%

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

View full text Add to dashboard Cite

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“…During the past few decades, β titanium alloys have become one of the most promising candidates due to their high specific strength and good corrosion resistance [1,2]. Mo is desirable as an alloying element for the development of Ti-based biomaterials.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Microstructures, Mechanical Properties and Corrosion Behaviours of Ti-8Mo-6Ni Alloys Adding NbC PowdersviaVacuum Sintering Process

et al. 2017

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Abstract. In this study, the Ti-8Mo-6Ni alloys are subjected to add various amounts of NbC carbides as a strengthening phase after the sintering process. Meanwhile, the composite materials underwent a vacuum sintering process at different temperatures of 1175°C, 1225°C and 1275°C for 1 h, respectively. To evaluate the microstructure, mechanical properties and corrosion behaviors of the Ti-8Mo-6Ni alloys adding NbC via the vacuum sintering processes, tests on the relative density, hardness, transverse rupture strength (TRS), corrosion and microstructure inspections are performed using XRD and SEM, with the aim of improving the microstructure and properties of sintered Ti-8Mo-6Ni alloys. The experimental results showed that when 1 wt% of NbC carbides is added to the Ti-8Mo-6Ni alloys they possessed the optimal properties after sintering at 1275°C for 1 h. The sintering density increased to about 99.7%, the hardness is enhanced to 48.1 HRC and the TRS increased to 976 MPa. Meanwhile, the sintered composite materials possessed good corrosion resistance.

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“…In the as-solution treated condition, the tensile properties of β titanium alloys have been reported to depend signi cantly on the deformation mode, which is closely associated with the β phase stability. [3][4][5] Mo is desirable as an alloying element for the development of Ti-based biomaterials. Previous research have studied the phase transformations and mechanical properties of different Ti-Mo alloys, and found that the phase constitutions, elastic modulus and hardness are different for TiMo alloys with different Mo contents.…”

Section: Introductionmentioning

confidence: 99%

Change in Microstructure, Mechanical Strength and Corrosion Resistance of Ti-8Mo-xNi Alloys through Various Sintering Temperatures

et al. 2016

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In this study, three different powders are mixed and used to produce Ti-8Mo-xNi alloys in three different proportions: Ti-8Mo-4Ni, Ti8Mo-6Ni and Ti-8Mo-8Ni. The Ti-Mo-Ni alloys simultaneously undergo various vacuum sintering temperatures of 1125, 1150, 1175 and 1200 C, respectively. The experimental results show that the Ti-8Mo-8Ni alloys acquire a higher sintering density (98.9%) and hardness (52.1 HRC) after sintering at 1175 C for 1 h. However, due to the grain growth and increased amount of nickel in the Ti-8Mo-8Ni alloys, the transverse rupture strength (TRS) shows an obvious decrease (as compared with Ti-8Mo-6Ni, the TRS value decreasing from 1177 to 685 MPa). Consequently, the suitable Ni content of the Ti-8Mo-6Ni alloys which proves advantageous to the TRS results from the uniform distribution of the TiNi intermetallic compound precipitates within the β matrix. The sintered Ti-8Mo-8Ni alloys also possess the lowest corrosion current (I corr = 1.87 × 10 −7 A·cm −2) and highest polarization resistance (56084 Ω·cm 2 ) in 3.5 mass% NaCl solutions. This result con rms that sintered Ti-8Mo-8Ni alloys effectively improve corrosion resistance.

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Microstructures and mechanical properties of metastable β TiNbSn alloys cold rolled and heat treated

Cited by 180 publications

References 19 publications

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

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

Investigation of the Microstructures, Mechanical Properties and Corrosion Behaviours of Ti-8Mo-6Ni Alloys Adding NbC PowdersviaVacuum Sintering Process

Change in Microstructure, Mechanical Strength and Corrosion Resistance of Ti-8Mo-xNi Alloys through Various Sintering Temperatures

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