Phase transformation of quenched α″ martensite by aging in Ti–Nb alloys

Mantani, Yoshikazu; Tajima, Mamoru

doi:10.1016/j.msea.2006.02.180

Cited by 173 publications

(94 citation statements)

References 8 publications

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“…These samples can be identified as reflections from the diffracting plane of -BBC (bodycentered cubic) of Ti and Nb solid solution and non-equilibrium α''-phase with orthorhombic lattice on X-ray diffractograms (Figure 3с). The existing α''-phase is associated with the unbalanced cooling and crystallization conditions of composite powder [9,10].…”

Section: Resultsmentioning

confidence: 99%

Phase Composition and Microstructure of Ti-Nb Alloy Produced by Selective Laser Melting

Sharkeev

Eroshenko

Kovalevskaya

et al. 2016

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. The phase composition and microstructure of Ti-Nb alloy produced from composite titanium and niobium powder by selective laser melting (SLM) was studied. Produced monolayered Ti-Nb alloy enhanced the formation of fine-grained and medium-grained zones with homogeneous element composition of 36-38% Nb mass interval. Alloy phase composition responded to -alloy substrate phase (grain size was 5-7 µm) and non-equilibrium martensite -phase (grain size was 0.1-0.7 µm). -phase grains were found along -phase grain boundaries and inside grains, including decreased niobium content. Alloy microhardness varied within 4200-5500 MPa.

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Section: Resultsmentioning

confidence: 99%

Phase Composition and Microstructure of Ti-Nb Alloy Produced by Selective Laser Melting

Sharkeev

Eroshenko

Kovalevskaya

et al. 2016

IOP Conf. Ser.: Mater. Sci. Eng.

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“…The -phase grain volume includes acicular inclusions that are characteristic for metastable orthorhombic martensite -phase [9]. The formation of such a structure after annealing is characteristic for titanium-based alloys containing from 30 to 40 wt.% of Nb [11].…”

Section: Resultsmentioning

confidence: 99%

“…+ [9,10]. X-ray diffractograms of the annealed alloy subjected to isothemral multi-axial forging with consequent rolling are presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and mechanical properties of Ti40Nb alloy after severe plastic deformation

Sharkeev¹,

Eroshenko²,

Глухов³

et al. 2014

AIP Conference Proceedings

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Abstract. The study presents the analysis of microstructure, phase composition and mechanical properties of Ti40Nb alloy exposed to severe plastic deformation. It was shown that isothermal multi-axial forging and further multi-pass rolling intensify the formation of ultra-fine grained structure in the bulk of a billet with the average element size of 0.3 μm. Such ultra-fine grained structure considerably improves the alloy mechanical properties.

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“…Pure Ti and Ti alloys are two of the most popular biomaterials in use today due to their favorable properties, such as biocompatibility, mechanical properties, and corrosion resistance [1][2][3]. These alloys have a considerably wide range of biomedical applications, such as dental implants, crowns, and bridges; orthodontic wires; bone plates; hip joints; and spinal fixation devices [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, in the current study, we selected Ti-Nb alloys as our research focus. In previous studies on Ti-Nb alloys, the proportion of Nb ranged from 10-40% [1][2][3]12,18,27]. Therefore, for our research, we chose an alloy composition of 12%, which is referred to as Ti-(12%)Nb.…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Properties and Corrosion Resistance of the Newly Developed Biomaterial, Ti–12Nb–1Ag Alloy

Chao

Chiu

et al. 2017

Metals

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Currently, the development of biomaterials has focused on having a low Young's modulus, biocompatibility, corrosion resistance, and antibacterial properties. Ti-Nb alloys have higher research value due to their excellent corrosion resistance and low Young's modulus. In recent years, the antibacterial properties of materials have been enhanced by the addition of Ag and Cu. Therefore, the corrosion resistance and antibacterial properties of the Ti-12Nb-1Ag alloy formulated in the current study were investigated and compared to those of commonly used Ti alloys, G2 pure Ti (ASTM B348 CP Grade 2), and Ti-6Al-4V, via electrochemical and E. coli antibacterial tests. Meanwhile, we also carried out a microstructural analysis to investigate the composition of the alloy. The results were as follows: (1) The electrochemical test demonstrated that Ti-12Nb-1Ag had a higher corrosion resistance than Ti-6Al-4V, which is similar to the properties of pure Ti. (2) The E. coli antibacterial test demonstrated that the sterilization rate of Ti-12Nb-1Ag was higher than that of the Ti-6Al-4V alloy and pure Ti. (3) The microstructural analysis revealed that Ti-12Nb-1Ag had an acicular martensite structure, with nano-Ag precipitates observed. Based on the results of the E. coli antibacterial test and the principles of sterilization of nano-precipitates and Ag, we inferred that the nano-Ag precipitates of Ti-12Nb-1Ag enhanced the antibacterial properties of the newly developed biomaterial, which is, namely, the Ti-12Nb-1Ag alloy.

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Phase transformation of quenched α″ martensite by aging in Ti–Nb alloys

Cited by 173 publications

References 8 publications

Phase Composition and Microstructure of Ti-Nb Alloy Produced by Selective Laser Melting

Phase Composition and Microstructure of Ti-Nb Alloy Produced by Selective Laser Melting

Microstructure and mechanical properties of Ti40Nb alloy after severe plastic deformation

Antibacterial Properties and Corrosion Resistance of the Newly Developed Biomaterial, Ti–12Nb–1Ag Alloy

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