Publications

In-situ compression with acoustic emission detection of high pressure torsion deformed Cu<sub>38</sub>Zr<sub>54</sub>Al<sub>8</sub> metallic glass micropillars

Author(s)
Talaye Arjmandabasi, Dávid Ugi, Ádám Révész, Erhard Schafler, David J. Browne, Zsolt Kovács
Abstract

In-situ compression of Cu38Zr54Al8 metallic glass micropillars in a scanning electron microscope was performed together with continuous acoustic emission recording on samples in the as-cast state and after pre-deformation by high pressure torsion. A size effect was detected in both shear band operation and acoustic emission signal, irrespective of the preliminary deformation. This phenomenon was explained by the size dependent compliance of the pillar/indenter system. Differences between acoustic emission signals from the as-cast and pre-deformed states indicated changes in the shear band formation mechanism due to high pressure torsion. These differences were clear in the elastic regime of the in-situ compression and supported the role of rejuvenation in stabilization of unstable shear bands.

Organisation(s)
Dynamics of Condensed Systems
External organisation(s)
Eötvös Loránd University Budapest, University College Dublin
Journal
Journal of Alloys and Compounds
Volume
965
No. of pages
9
ISSN
0925-8388
DOI
https://doi.org/10.1016/j.jallcom.2023.171295
Publication date
11-2023
Peer reviewed
Yes
Austrian Fields of Science 2012
210004 Nanomaterials, 103018 Materials physics
Keywords
ASJC Scopus subject areas
Mechanics of Materials, Mechanical Engineering, Metals and Alloys, Materials Chemistry
Portal url
https://ucrisportal.univie.ac.at/en/publications/insitu-compression-with-acoustic-emission-detection-of-high-pressure-torsion-deformed-cu38zr54al8-metallic-glass-micropillars(c0125215-203c-4c84-8514-6702e06db465).html