Composition optimization of low modulus and high-strength TiNb-based alloys for biomedical applications

Okulov, Ilya; Волегов, А. С.; Attar, Hooyar; Bönisch, Matthias; Ehtemam-Haghighi, Shima; Calin, Mariana; Eckert, J.

doi:10.1016/j.jmbbm.2016.10.013

Cited by 104 publications

(44 citation statements)

References 41 publications

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“…This fact is mainly due to the ratio between physicochemical properties and weight, and an excellent biocompatibility with organic environments [1][2][3]. Also, current advances in biotechnology and biomechanics induce the development of new materials and surface treatments that aim to increase wear and corrosion strength, or improve features, which allows the promotion of the biointegration of materials [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effects of Laser Processing Parameters on Texturized Layer Development and Surface Features of Ti6Al4V Alloy Samples

Salguero

Batista

et al. 2017

Coatings

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Surface engineering is widely used in different areas, such as the aerospace industry or the biomechanical and medical fields. Specifically, laser surface modification techniques may obtain specific surface finishes for special applications. In texturing laser procedures, the control of processing parameters has a great influence on the geometry and characteristics of the treated area. When these processes are carried out on titanium alloys, thin oxide layers are usually developed on the irradiated surface, formed through the thermochemical combination of vaporized material with atmospheric oxygen in the air. In thermal oxidation treatments of Ti6Al4V, the highest concentration of oxides is mainly composed by rutile (TiO 2 ), producing surface property modifications such as hardness, among others. In this research, a thermochemical oxidation of Ti6Al4V alloy has been performed through laser texturing, using laser scanning speed (V s ) and pulse rate (f ) as process control variables, and its influence on the beam absorption capacity of the modified layer have been analyzed. Combined evaluations of microgeometrical features and mechanical properties, such as hardness, verified that, by means of laser texturing treatments, the ability to generate specific topographies and increase the initial hardness of the alloy is obtained. The most advantageous results for the increase of hardness by thermochemical oxidation have been detected in low scan speeds of laser beam treatments, resulting in an increase of approximately 270% using a scanning speed of 10 mm/s. On the other hand, a dependence between roughness values, in terms of R a and R z , and the energy density of pulse (E d ) has been observed, showing higher values of roughness for a 17.68 J/cm 2 energy density of pulse.

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Section: Introductionmentioning

confidence: 99%

Effects of Laser Processing Parameters on Texturized Layer Development and Surface Features of Ti6Al4V Alloy Samples

Salguero

Batista

et al. 2017

Coatings

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“…reasonable feedback on their efficacy. However, the accuracy of the results acquired from in-vitro studies depends on various experimental factors [25]. Therefore, in terms of in-vitro evaluation of the biocompatibility of magnesium based materials it is recommended a minimal 6 times to a maximal 10 times dilution of extracts for in-vitro cytotoxicity evaluation because of the differences in sensitivities of cells to in-vitro and in-vivo magnesium ions and the capability of in-vivo circulation system to dilute local degradation products [26].…”

Section: Bild 7 Technischementioning

confidence: 99%

Processing and properties of a new biodegradable Mg−Zn−Ca−Zr alloy

Răducanu

Cojocaru

Şerban

et al. 2019

Materialwissenschaft Werkst

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Magnesium alloys are used for degradable orthopaedic and cardiovascular implants due to their favourable mechanical and biological properties, degradation ability in physiological environment and stimulatory effect on the new bone formation. The research challenges are related to the increase of biological and mechanical compatibility. For the present study, a magnesium based alloy design was conducted to the following chemical composition: Mg−2.7Zn−1Ca−0.6Zr (wt.%). A complex thermomechanical processing route was applied: a plastic deformation by extrusion at various temperatures and deformation degrees (400 °C–480 °C, ϵ = 20 %–40 %), followed by various final heat treatments at 200 °C–400 °C for 10 min–60 min. Further, the influence of processing parameters upon the structure, mechanical properties and biological response was studied. Processed specimens were characterized by scanning electron microscopy (secondary electron imaging and energy dispersive spectroscopy) and mechanically by tensile tests. The most representative results were obtained for the samples extruded at 450 °C/ϵ = 20 %, followed by a final heat treatment at 350 °C/15 min, air cooling. Further, for samples which revealed promising results, in‐vitro testing was developed. Biocompatibility testing of the Mg−2.7Zn−1Ca−0.6Zr (wt.%) alloy was realized by indirect contact studies using the Vero (ATCC® CCL‐81™, American Type Culture Collection) cell line. Cells morphologies, cell viability and proliferation were evaluated.

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“…Some examples include anomalously low elastic modulus in Fe-Mg microcomposites [10], outstanding strength in metal-polymer nanocomposites [5,[11][12][13] fabricated from nanoporous metals [14][15][16][17][18][19], and significantly enhanced plastic deformability in metallic glass composites [20,21]. The design of non-equilibrium composite microstructures in as-cast nanostructured titanium alloys [22][23][24][25][26] leads to the high strength and good plastic deformability required for structural and biomedical applications [27,28]. One of the promising processing methods for the design of advanced materials with non-equilibrium composite microstructures is the annealing of metallic glasses [21,29].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Metastable Crystalline Nanocomposites by Flash Annealing of Cu47.5Zr47.5Al5 Metallic Glass Using Joule Heating

et al. 2020

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Flash Joule-heating was applied to the Cu47.5Zr47.5Al5 metallic glass for designing fully crystalline metastable nanocomposites consisting of the metastable B2 CuZr and low-temperature equilibrium Cu10Zr7 phases. The onset of crystallization was in situ controlled by monitoring resistivity changes in the samples. The effect of heating rate and annealing time on the volume fraction of the crystalline phases and mechanical properties of the nanocomposites was studied in detail. Particularly, an increase of the heating rate and a decrease of the annealing time lead to a lower number of equilibrium Cu10Zr7 precipitates and an increase of tensile ductility. Tailoring of these non-equilibrium microstructures and mechanical properties may not be possible unless one starts with a fully glassy material that opens new perspectives for designing metastable nanomaterials with unique physical properties.

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Composition optimization of low modulus and high-strength TiNb-based alloys for biomedical applications

Cited by 104 publications

References 41 publications

Effects of Laser Processing Parameters on Texturized Layer Development and Surface Features of Ti6Al4V Alloy Samples

Effects of Laser Processing Parameters on Texturized Layer Development and Surface Features of Ti6Al4V Alloy Samples

Processing and properties of a new biodegradable Mg−Zn−Ca−Zr alloy

Fabrication of Metastable Crystalline Nanocomposites by Flash Annealing of Cu47.5Zr47.5Al5 Metallic Glass Using Joule Heating

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