Evolution of strength and structure during SPD processing of Ti-45Nb alloys: experiments and simulations

Autor(en)

B. Sulkowski, A. Panigrahi, K. Ozaltin, M. Lewandowska, B. Mikulowski, M. Zehetbauer

Abstrakt

A β-phase Ti–45Nb alloy was processed by several severe plastic deformation (SPD) methods as high-pressure torsion, cold rolling and folding, and hydrostatic extrusion to enhance its strength by achieving an ultrafine grained structure without affecting the Young’s modulus being close to that of bone material. Mechanical properties during processing were monitored by direct torque and Vickers hardness measurements, while the micro-/nano-structural evolution was investigated by transmission electron microscopy and X-ray line profile analysis. Simulations of both mechanical and micro-/nano-structural data were performed on the basis of the SPD work-hardening model by Zehetbauer. The simulations not only found a good agreement with the deformation-specific evolution of strength and density of individual dislocations but also well reflected mesoscopic structural quantities such as the sizes of cell/grain interiors and walls without introducing additional fitting parameters.

Organisation(en)

Physik Nanostrukturierter Materialien

Externe Organisation(en)

Warsaw University of Technology, AGH University of Science and Technology

Journal

Journal of Materials Science

Band

49

Seiten

6648-6655

Anzahl der Seiten

8

ISSN

0022-2461

DOI

https://doi.org/10.1007/s10853-014-8320-2

Publikationsdatum

10-2014

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Schlagwörter

ASJC Scopus Sachgebiete

Mechanics of Materials, Mechanical Engineering, Allgemeine Materialwissenschaften

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/8b2f5e64-9597-4607-a4a8-5137e2612457