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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Waitz, Thomas
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2021In Situ Synchrotron X‐Ray Diffraction during High‐Pressure Torsion Deformation of Ni and NiTicitations
- 2016Experimental and theoretical evidence of displacive martensite in an intermetallic Mo-containing $gamma$-TiAl based alloycitations
- 2016Mechanical properties, structural and texture evolution of biocompatible Ti–45Nb alloy processed by severe plastic deformationcitations
- 2013Thermal stability and phase transformations of martensitic Ti-Nb alloyscitations
- 2007Formation and structures of bulk nanocrystalline intermetallic alloys studied by transmission electron microscopycitations
- 2005Martensitic phase transformations of bulk nanocrystalline NiTi alloys
- 2004HRTEM analysis of nanostructured alloys processed by severe plastic deformationcitations
- 2004TEM of nanostructured metals and alloyscitations
- 2003TEM investigation of the structure of deformation-induced antiphase boundary faults in Ni3Alcitations
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article
Mechanical properties, structural and texture evolution of biocompatible Ti–45Nb alloy processed by severe plastic deformation
Abstract
<p>Biocompatible β Ti–45Nb (wt%) alloys were subjected to different methods of severe plastic deformation (SPD) in order to increase the mechanical strength without increasing the low Young׳s modulus thus avoiding the stress shielding effect. The mechanical properties, microstructural changes and texture evolution were investigated, by means of tensile, microhardness and nanoindentation tests, as well as TEM and XRD. Significant increases of hardness and ultimate tensile strength up to a factor 1.6 and 2, respectively, could be achieved depending on the SPD method applied (hydrostatic extrusion – HE, high pressure torsion – HPT, and rolling and folding – R&F), while maintaining the considerable ductility. Due to the high content of β-stabilizing Nb, the initial lattice structure turned out to be stable upon all of the SPD methods applied. This explains why with all SPD methods the apparent Young׳s modulus measured by nanoindentation did not exceed that of the non-processed material. For its variations below that level, they could be quantitatively related to changes in the SPD-induced texture, by means of calculations of the Young׳s modulus on basis of the texture data which were carefully measured for all different SPD techniques and strains. This is especially true for the significant decrease of Young׳s modulus for increasing R&F processing which is thus identified as a texture effect. Considering the mechanical biocompatibility (percentage of hardness over Young׳s modulus), a value of 3–4% is achieved with all the SPD routes applied which recommends them for enhancing β Ti-alloys for biomedical applications.</p>