Microstructure and Properties of Nanostructured Zirconium Processed by High Pressure Torsion

Autor(en)

A. V. Podolskiy, Bartlomiej Bonarski, Daria Setman, Clemens Mangler, Erhard Schafler, Elena D. Tabachnikova, Michael Zehetbauer

Abstrakt

Several structural states of nanostructured zirconium were achieved by high pressure torsion (HPT) at pressures of 2 and 4 GPa with and without subsequent low temperature annealing. The nanostructured Zr was studied by X-Ray Diffraction, Transmission Electron Microscopy and Differential Scanning Calorimetry to reveal the microstructure, phase composition and the thermal stability of this material. The fine grained structure being achieved by HPT had an average grain size of 100-200 nm. It was shown that HPT at 4 GPa leads to a phase transformation from alpha-Zr to omega-Zr, which has been demonstrated to be reversible by annealing at 300degC without considerable change of the grain size. The evaluation of texture evolution in Zr during HPT exhibits activity of prismatic slip systems. DSC curves confirm the presence of HPT deformation induced lattice defects and the occurrence of the omega-alpha phase transition in Zr.

Organisation(en)

Physik Nanostrukturierter Materialien

Externe Organisation(en)

National Academy of Sciences of Ukraine (NASU)

Journal

Materials Science Forum

Band

667-669

Seiten

433-438

Anzahl der Seiten

6

ISSN

0255-5476

DOI

https://doi.org/10.4028/www.scientific.net/MSF.667-669.433

Publikationsdatum

2011

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie, 210006 Nanotechnologie, 103018 Materialphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/cea3d2e7-5040-475c-b0a4-0386fa83276c