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://ucris.univie.ac.at/portal/en/publications/correlation-between-microstructural-evolution-during-highpressure-torsion-and-isothermal-heat-treatment-of-amorphous-al85gd8ni5co2-alloy(ee5e1b9d-6a6e-4118-9803-e555b1cdc011).html