Structure and functional properties of metastable beta Ti-18Zr-14Nb (at.%) alloy for biomedical applications subjected to radial shear rolling and thermomechanical treatment

In this work we present the results of a functional properties assessment via Atomic Force Microscopy (AFM)-based surface morphology, surface roughness, nano-scratch tests and adhesion force maps of TiZr-based nanotubular structures. The nanostructures have been electrochemically prepared in a glycerin + 15 vol.% H2O + 0.2 M NH4F electrolyte. The AFM topography images confirmed the successful preparation of the nanotubular coatings. The Root Mean Square (RMS) and average (Ra) roughness parameters increased after anodizing, while the mean adhesion force value decreased. The prepared nanocoatings exhibited a smaller mean scratch hardness value compared to the un-coated TiZr. However, the mean hardness (H) values of the coatings highlight their potential in having reliable mechanical resistances, which along with the significant increase of the surface roughness parameters, which could help in improving the osseointegration, and also with the important decrease of the mean adhesion force, which could lead to a reduction in bacterial adhesion, are providing the nanostructures with a great potential to be used as a better alternative for Ti implants in dentistry.

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A Comparative Study of Structure Formation in Thermomechanically Treated Ti-Ni and Ti-Nb-(Zr, Ta) SMA

Materials Science Forum ◽

10.4028/www.scientific.net/msf.706-709.1931 ◽

2012 ◽

Vol 706-709 ◽

pp. 1931-1936 ◽

Cited By ~ 5

Author(s):

Sergey Prokoshkin ◽

Vladimir Brailovski ◽

Karine Inaekyan ◽

Andrey Korotitskiy ◽

Sergey Dubinskiy ◽

...

Keyword(s):

Cold Rolling ◽

Comparative Study ◽

Shape Memory Alloys ◽

Shape Memory ◽

Structure Formation ◽

Thermomechanical Treatment ◽

Functional Properties ◽

Nanocrystalline Structure ◽

Technological Factors

The processes of structure formation in Ti-Ni and in Ti-Nb-Zr, Ti-Nb-Ta shape memory alloys (SMA) under thermomechanical treatment (TMT) were studied. The TMT comprised cold rolling with true strains from e=0.25 to 2 and post-deformation annealing. Differences in these processes between two groups of alloys are considered. The main conclusions are as follows: nanostructures created by TMT are useful for radical improvement of the SMA functional properties, and an optimum nanostructure (nanocrystalline structure, nanosubgrained structure or theirmixture) should be selected by taking into account other structural and technological factors.

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Eletrochemical Behavior of Hot Swaged and Aged Ti-12Mo-13Nb Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.899.295 ◽

2017 ◽

Vol 899 ◽

pp. 295-298

Author(s):

Sinara Borborema Gabriel ◽

Gabriel Feliciano Santos ◽

Artur da Silva Siqueira de Novais ◽

Raphaela Paciello de Souza Lamarca ◽

Carlos Angelo Nunes ◽

...

Keyword(s):

Corrosion Resistance ◽

Biomedical Applications ◽

Orthopedic Implants ◽

Nacl Solution ◽

Good Corrosion Resistance ◽

Ti Alloys ◽

Transmission Electron ◽

Low Modulus ◽

Potential Alternative ◽

Metastable Beta

Recent studies have focused on the development of metastable beta-type Ti alloys with non-toxic elements such as Nb, Ta, Mo and Zr for biomedical applications. These alloys present low modulus, good mechanical compatibility and good corrosion resistance. Moreover, the processing variables can be controlled to produce microstructures with specific properties. In this regard, the objective of this work was to analyze the electrochemical behavior of Ti-13Nb-12Mo alloy hot forged and aged at 500 °C/24 h. The microstructure was analyzed by transmission electron microscopy. The corrosion tests were carried out under a NaCl solution at a temperature of 25 °C. The results showed that under the conditions studied Ti-12Mo-13Nb alloy exhibited passivation, which is desirable for corrosion resistance. Therefore the alloy is a potential alternative for the of Ti-6Al-4V used in orthopedic implants.

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Creation of Substructure and Nanostructure in Thermomechanical Treatment and Control of Functional Properties of Ti - Ni Alloys with Shape Memory Effect

Metal Science and Heat Treatment ◽

10.1007/s11041-005-0049-8 ◽

2005 ◽

Vol 47 (5-6) ◽

pp. 182-187 ◽

Cited By ~ 18

Author(s):

S. D. Prokoshkin ◽

V. Brailovskii ◽

I. Yu. Khmelevskaya ◽

S. V. Dobatkin ◽

K. E. Inaekyan ◽

...

Keyword(s):

Shape Memory ◽

Shape Memory Effect ◽

Thermomechanical Treatment ◽

Memory Effect ◽

Functional Properties ◽

Ni Alloys ◽

And Control

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High-strength metastable beta-titanium alloys for biomedical applications

JOM ◽

10.1007/s11837-005-0244-5 ◽

2005 ◽

Vol 57 (7) ◽

pp. 5-5 ◽

Cited By ~ 4

Author(s):

J. I. Qazi ◽

B. Marquardt ◽

H. J. Rack

Keyword(s):

Titanium Alloys ◽

Biomedical Applications ◽

High Strength ◽

Beta Titanium ◽

Metastable Beta ◽

Beta Titanium Alloys

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On Functional Behavior of Strain-Aged Ti-Ni Alloy

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.59.162 ◽

2008 ◽

Vol 59 ◽

pp. 162-167 ◽

Cited By ~ 1

Author(s):

Elena P. Ryklina ◽

Sergey Prokoshkin ◽

A.A. Chernavina ◽

Natasha N. Perevoshchikova

Keyword(s):

Shape Memory ◽

Thermomechanical Treatment ◽

Functional Properties ◽

Shape Recovery ◽

Critical Temperatures ◽

Functional Behavior ◽

Bending Mode ◽

Ni Alloy ◽

External Training ◽

Loading Modes

The functional properties of the Shape Memory Alloys (SMA): critical temperatures, recovery strain, shape recovery rate, two-way shape memory effect (TWSME) value, residual strain etc are determined by an alloy structure which is effectively regulated by thermomechanical treatment. External training parameters strongly affect the final properties as well. The main of them are as follows: strain and loading modes, loading temperature regime (phase state under deformation), load value, loading time, number of training cycles. Actual technical and medical SME articles are functioning on bending mode in most cases. Nevertheless, the influence of external training parameters under bending on properties was not systematically studied. The present work relates to study the combined influence of structure realized under various Low- Temperature Thermomechanical Treatment (LTMT) regimes, including isothermal annealing (strain aging), and external training parameters under bending on functional properties of Ti- 50.7at.%Ni alloy. Variation of training parameters enables additional regulation of final functional properties. The obtained results can be used for development elements functioning in conditions of TWSME realization.

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Supramolecular-directed novel superparamagnetic 5′-adenosine monophosphate templated β-FeOOH hydrogel with enhanced multi-functional properties

Green Chemistry ◽

10.1039/c4gc02530j ◽

2015 ◽

Vol 17 (4) ◽

pp. 2524-2537 ◽

Cited By ~ 12

Author(s):

Anil Kumar ◽

Sudhir Kumar Gupta

Keyword(s):

Surface Area ◽

Functional Properties ◽

Biomedical Applications ◽

High Surface ◽

High Surface Area ◽

Adenosine Monophosphate ◽

Potential Utility ◽

Nir Absorption ◽

Porous Hydrogel ◽

Toxic Components

Superparamagnetic 5′-AMP-mediated β-FeOOH porous hydrogel containing non-toxic components with high surface area, NIR absorption, and potential utility for biomedical applications.

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