High-pressure torsion deformation of a magnesium-based nanocomposite

Autor(en)

Zoltan Száraz, Zuzanka Trojanová, Michael Zehetbauer

Abstrakt

Discs of microcrystalline magnesium reinforced with Al2O3 nanoparticles were deformed by high-pressure torsion at room temperature. Hydrostatic pressures from 1 to about 4 GPa were used and discs were deformed from 0.5 up to 2 rotations. The in-situ flow stress curves were obtained and transformed into resolved shear stress/resolved shear strain curves. In-situ stress – strain curves indicate some softening effects, which probably arise from recrystallisation. The evolution of microstructure was observed with methods of light microscopy and transmission electron microscopy. Radial dependence of the microstructure was also monitored with microhardness measurements. The high-pressure torsion deformation also affects the distribution of the reinforcing particles in the hexagonal matrix.

Organisation(en)

Physik Nanostrukturierter Materialien

Externe Organisation(en)

Charles University Prague

Journal

Journal of Materials Research

Band

100

Seiten

906-909

Anzahl der Seiten

4

ISSN

0884-2914

DOI

https://doi.org/10.3139/146.110126

Publikationsdatum

2009

Peer-reviewed

Ja

ÖFOS 2012

103023 Polymerphysik, 210006 Nanotechnologie, 103018 Materialphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/ca85f2c7-f3da-46ad-95f6-5f6bf207c9df