Influence of ω phase precipitation on mechanical performance and corrosion resistance of Ti–Nb–Zr alloy

Li, Qiang; Li, Junjie; Ma, Guanghao; Liu, Xuyan; Pan, Deng

doi:10.1016/j.matdes.2016.09.026

Cited by 32 publications

(6 citation statements)

References 30 publications

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“…The α′′ martensite tended to be observed together with ω phase instead of α′′ itself. A similar study was showed by Li et al [ 50 ], in which improving the mechanical properties of the Ti–Nb–Zr alloys is related to the presence of the ω phase, since ω is a hard and brittle phase which could improve the strength of the β phase. Besides, due to the coherent interface between the ω phase and β matrix, the reaction of nanobands with dislocations also contributed to the strengthening effect of the ω phase.…”

Section: Discussionsupporting

confidence: 73%

Mechanobiologically optimized Ti–35Nb–2Ta–3Zr improves load transduction and enhances bone remodeling in tilted dental implant therapy

Mao

Jin

et al. 2022

Bioactive Materials

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Section: Discussionsupporting

confidence: 73%

Mechanobiologically optimized Ti–35Nb–2Ta–3Zr improves load transduction and enhances bone remodeling in tilted dental implant therapy

Mao

Jin

et al. 2022

Bioactive Materials

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“…The both deformed samples had higher passive current densities than CP Ti due to the precipitation of ω phase during the deformation and ageing processes which significantly destabilize the passive oxide film [56]. According to the results of [58,59], not any deformation procedure can improve the corrosion resistance of β type Ti alloys. There are a range of parameters such as deformation percent, annealing temperature and the texture of refined grains (e.g., uniform orientation) can affect the electrochemical behaviour of the alloy.…”

Section: Fabrication Processmentioning

confidence: 95%

“…It is indicated that the HR sample with a coarse lamellar structure has higher corrosion current density (0.9976 mA/cm 2 ) compared to the WR sample (0.8179 mA/cm 2 ) with an ultra-fine microstructure and formation of more stable and passive surface layer. Also, in a study by Li et al [59], corrosion characterization of two Ti-24Nb-2Zr (at. %) samples were investigated.…”

Section: Fabrication Processmentioning

confidence: 96%

On the Corrosion Behaviour of Low Modulus Titanium Alloys for Medical Implant Applications: A Review

Afzali

Ghomashchi

Oskouei

2019

Metals

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The corrosion behaviour of new generation titanium alloys (β-type with low modulus) for medical implant applications is of paramount importance due to their possible detrimental effects in the human body such as release of toxic metal ions and corrosion products. In spite of remarkable advances in improving the mechanical properties and reducing the elastic modulus, limited studies have been done on the electrochemical corrosion behaviour of various types of low modulus titanium alloys including the effect of different beta-stabilizer alloying elements. This development should aim for a good balance between mechanical properties, design features, metallurgical aspects and, importantly, corrosion resistance. In this article, we review several significant factors that can influence the corrosion resistance of new-generation titanium alloys such as fabrication process, body electrolyte properties, mechanical treatments, alloying composition, surface passive layer, and constituent phases. The essential factors and their critical features are discussed. The impact of various amounts of α and β phases in the microstructure, their interactions, and their dissolution rates on the surface passive layer and bulk corrosion behaviour are reviewed and discussed in detail. In addition, the importance of different corrosion types for various medical implant applications is addressed in order to specify the significance of every corrosion phenomenon in medical implants.

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“…During the growth of ω iso particles, alloying elements diffuse from the ω phase into the surrounding β matrix [1,13,14,86,91]. APT is a powerful technique for investigating sub-nanometer scale, spatially resolved composition of precipitate phases [92], and APT studies of multiple binary β Ti alloys clearly show that the ω phase is solute-lean (shown in Figure 5) [20,32,43,70,93].…”

Section: Isothermal ω Phasementioning

confidence: 99%

A review of the metastable omega phase in beta titanium alloys: the phase transformation mechanisms and its effect on mechanical properties

Ballor

Prima

et al. 2022

International Materials Reviews

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Since its discovery in 1954, the omega (ω) phase in titanium and its alloys has attracted substantial attention from researchers. The β-to-ω and ω-to-α phase transformations are central to β-titanium alloy design, but the transformation mechanisms have been a subject of debate. With new generations of aberration-corrected transmission electron microscopy and atom probe tomography, both the spatial resolution and compositional sensitivity of phase transformation analysis have been rapidly improving. This review provides a detailed assessment of the new understanding gained and related debates in this field enabled by advanced characterization methods. Specifically, new insights into the possibility of a coupled diffusional-displacive component in the β-to-ω transformation and key nucleation driving forces for the ω-assisted α phase formation are discussed. Additionally, the influence of ω phase on the mechanical properties of β-titanium alloys is also reviewed. Finally, a perspective on open questions and future direction for research is discussed.

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Influence of ω phase precipitation on mechanical performance and corrosion resistance of Ti–Nb–Zr alloy

Cited by 32 publications

References 30 publications

Mechanobiologically optimized Ti–35Nb–2Ta–3Zr improves load transduction and enhances bone remodeling in tilted dental implant therapy

Mechanobiologically optimized Ti–35Nb–2Ta–3Zr improves load transduction and enhances bone remodeling in tilted dental implant therapy

On the Corrosion Behaviour of Low Modulus Titanium Alloys for Medical Implant Applications: A Review

A review of the metastable omega phase in beta titanium alloys: the phase transformation mechanisms and its effect on mechanical properties

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