Shear Band-Induced Internal Surface Structures in a Vitreloy Bulk Metallic Glass Deformed by High-Pressure Torsion
- Author(s)
- Zsolt Kovács, Talaye Arjmandabasi, Gábor Erdei, Erhard Schafler, Ádám Révész
- Abstract
In the present investigation, high stability Vitreloy Zr44Ti11Cu10Ni10Be25 bulk metallic glass has been subjected to severe shear deformation by high-pressure torsion for 0.1 revolutions under an applied pressure of 4 and 8 GPa. The fully glassy nature of the as-cast glass has been confirmed by X-ray powder diffraction and differential scanning calorimetry. Deformation-induced surface features on an internal plane of the deformed disk-shaped specimens were studied in detail at the macroscopic level by optical reconstruction method and at microscopic scales by white-light optical profilometry. Shear and compressive strain components were measured based on surface changes and it was determined that compressive strain gradient with 0.2–0.4 strain change builds up toward the disk edge, while only part of the nominal shear deformation occurs in the disk interior. The effect of strain localization in the Vitreloy bulk metallic glasses has been quantified by a surface distortion model based on simple shear. The model was then validated experimentally by the reconstructed z-profiles.
- Organisation(s)
- Physics of Nanostructured Materials
- External organisation(s)
- Eötvös Loránd University Budapest, Budapest University of Technology and Economics
- Journal
- Materials
- Volume
- 18
- No. of pages
- 13
- ISSN
- 1996-1944
- DOI
- https://doi.org/10.3390/ma18051096
- Publication date
- 03-2025
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103018 Materials physics, 103015 Condensed matter
- Keywords
- ASJC Scopus subject areas
- General Materials Science, Condensed Matter Physics
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/bc9ee16a-df87-4106-8b44-6aac532cd5b3