Structural modifications during heating of bulk nanocrystalline FeAl produced by high-pressure torsion
- Author(s)
- Clemens Mangler, Christoph Gammer, Hans-Peter Karnthaler, Christian Rentenberger
- Abstract
The deformation-induced nanostructure developed during high-pressure torsion of B2 long-range ordered FeAl is shown to be unstable upon heating. The structural changes were analyzed using transmission electron microscopy, differential scanning calorimetry and microhardness measurements. Heating up to 220 °C leads to the recurrence of the chemical long-range order that is destroyed during deformation. It is shown that the transition to the long-range-ordered phase evolves in the form of small ordered domains homogeneously distributed inside the nanosized grains. At temperatures between 220 and 370 °C recovery of dislocations and antiphase boundary faults cause a reduction in the grain size from 77 to 35 nm. Grain growth occurs at temperatures above 370 °C. The evolution of the strength monitored by microhardness is discussed in the framework of grain-size hardening and hardening by defect recovery.
- Organisation(s)
- Physics of Nanostructured Materials
- Journal
- Acta Materialia
- Volume
- 58
- Pages
- 5631-5638
- No. of pages
- 8
- ISSN
- 1359-6454
- DOI
- https://doi.org/10.1016/j.actamat.2010.06.036
- Publication date
- 2010
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 210006 Nanotechnology, 103018 Materials physics
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/structural-modifications-during-heating-of-bulk-nanocrystalline-feal-produced-by-highpressure-torsion(ec96d364-3068-40de-9a27-f9e11f49ced5).html