Correlation between microstructural evolution during high-pressure torsion and isothermal heat treatment of amorphous Al85Gd8Ni5Co2 alloy
- Author(s)
- Péter Henits, A Revesz, Erhard Schafler, Péter J. Szabó, Janos L. Labar, Lajos K. Varga, Zsolt Kovacs
- Abstract
Al85Gd8Ni5Co2 metallic glass was subjected to partial devitrification by high-pressure torsion, continuous heat treatment, and isothermal annealing. The fully amorphous alloy exhibits a well-defined transition in its first devitrification product during isothermal heat treatments from tau(m) + alpha-Al phase mixture to primary alpha-Al by increasing the annealing temperature above 555 K. This thermal sensitivity predestinates the composition to identify the controversial thermal contribution of the plastic deformation in metallic glasses. Thermal stability and structure of the partially devitrified samples were systematically analyzed and compared by calorimetry, x-ray diffraction, and electron microscopy. It seems that the effect of severe deformation cannot be singled out by a simple isothermal heat treatment; i.e., high-pressure torsion acts as a spectrum of heat treatments performed at different annealing temperatures
- Organisation(s)
- Physics of Nanostructured Materials
- External organisation(s)
- Eötvös Loránd University Budapest, Budapest University of Technology and Economics, Hungarian Academy of Sciences
- Journal
- Journal of Materials Research
- Volume
- 25
- Pages
- 1388-1397
- No. of pages
- 10
- ISSN
- 0884-2914
- DOI
- https://doi.org/10.1557/JMR.2010.0164
- Publication date
- 2010
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 1030 Physics, Astronomy
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/ee5e1b9d-6a6e-4118-9803-e555b1cdc011