Microstructure and Texture Evolutions of Biomedical Ti-13Nb-13Zr Alloy Processed by Hydrostatic Extrusion

Autor(en)

K. Ozaltin, A. Panigrahi, W. Chrominski, A. G. Bulutsuz, M. Kulczyk, M. J. Zehetbauer, M. Lewandowska

Abstrakt

A biomedical β-type Ti-13Nb-13Zr (TNZ) (wt pct) ternary alloy was subjected to severe plastic deformation by means of hydrostatic extrusion (HE) at room temperature without intermediate annealing. Its effect on microstructure, mechanical properties, phase transformations, and texture was investigated by light and electron microscopy, mechanical tests (Vickers microhardness and tensile tests), and XRD analysis. Microstructural investigations by light microscope and transmission electron microscope showed that, after HE, significant grain refinement took place, also reaching high dislocation densities. Increases in strength up to 50 pct occurred, although the elongation to fracture left after HE was almost 9 pct. Furthermore, Young’s modulus of HE-processed samples showed slightly lower values than the initial state due to texture. Such mechanical properties combined with lower Young’s modulus are favorable for medical applications. Phase transformation analyses demonstrated that both initial and extruded samples consist of α′ and β phases but that the phase fraction of α′ was slightly higher after two stages of HE.

Organisation(en)

Physik Nanostrukturierter Materialien

Externe Organisation(en)

Warsaw University of Technology, Polish Academy of Sciences (PAS)

Journal

Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science

Band

48

Seiten

5747-5755

Anzahl der Seiten

9

ISSN

1073-5623

DOI

https://doi.org/10.1007/s11661-017-4278-4

Publikationsdatum

11-2017

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Schlagwörter

ASJC Scopus Sachgebiete

Condensed Matter Physics, Mechanics of Materials, Metals and Alloys

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/3523ca70-1cc6-48c3-8e32-14d686647a9c