Nanocrystalline phases during mechanically activated processing of an iron (Fe) aluminum (40 at% Al) Alloy
Nanocrystalline phases during mechanically activated processing of an iron (Fe) aluminum (40 at% Al) Alloy
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Date
2014-07-03
Authors
Archana, M. S.
Ramakrishna, M.
Gundakaram, Ravi C.
Srikanth, V. V.S.S.
Joshi, S. V.
Joardar, J.
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Abstract
Influence of processing conditions on in situ generation of nanocrystalline Fe3AlCx and Fe-Al phases during mechanically activated annealing and sintering of Fe-40 at% Al alloy was evaluated. Fe3AlCx, Fe3Al and ordered FeAl phases evolved even at a low temperature of 400°C. The presence of carbide phase was attributed to the free carbon originating from the organic process control agent while its formation at low temperature was correlated to fast diffusion of C in the lattice assisted by the nanocrystalline structure coupled with the presence of thermal vacancies in the Fe-40 at% Al alloy. The as-sintered composite showed improved mechanical properties. © 2014 Copyright Taylor & Francis Group, LLC.
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Keywords
Intermetallics,
Iron-aluminide,
Milling,
Nanocomposite,
Nanocrystalline,
Sintering
Citation
Materials and Manufacturing Processes. v.29(7)