In-situ compression with acoustic emission detection of high pressure torsion deformed Cu₃₈Zr₅₄Al₈ 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://ucris.univie.ac.at/portal/en/publications/insitu-compression-with-acoustic-emission-detection-of-high-pressure-torsion-deformed-cu38zr54al8-metallic-glass-micropillars(c0125215-203c-4c84-8514-6702e06db465).html