In-Situ Synchrotron Profile Analysis after High-Pressure Torsion Deformation

Author(s)
Michael Kerber, Florian Spieckermann, Roman Schuster, Bertalan Joni, Norbert Schell, Erhard Schafler
Abstract

The presence of hydrostatic pressure is a general crucial characteristic of severe plastic deformation methods for reaching high strains and for introducing large quantities of lattice defects, which are necessary to establish new grain boundaries. Insights into the processes occurring during deformation and the influence of hydrostatic pressure are necessary to help better understand the SPD methods. A special experimental procedure was designed to simulate the hydrostatic pressure release: High pressure torsion (HPT)-deformed microstructure changes related to the release of hydrostatic pressure after the HPT deformation of copper and nickel were studied by freezing the sample before releasing the pressure. High-resolution in-situ X-ray diffraction of the heating process was performed using synchrotron radiation in order to apply X-ray line profile analysis to analyze the pressure release. The results on copper and nickel generally indicated the influence of hydrostatic pressure on the mobility and interaction of deformation-induced defects as well as the resulting microstructure.

Organisation(s)
Physics of Nanostructured Materials, Department of Lithospheric Research
External organisation(s)
Montanuniversität Leoben, Eötvös Loránd University Budapest, Deutsches Elektronen-Synchrotron DESY
Journal
Crystals - Open Access Crystallography Journal
Volume
9
No. of pages
12
ISSN
2073-4352
DOI
https://doi.org/10.3390/cryst9050232
Publication date
05-2019
Peer reviewed
Yes
Austrian Fields of Science 2012
Crystallography, Materials physics
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/insitu-synchrotron-profile-analysis-after-highpressure-torsion-deformation(9ce32699-1c02-42de-9215-8c89b8be5dda).html