Disordering and Ordering in a Severely Deformed FePd Alloy

Abstract:

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A Fe50Pd50 alloy was severely deformed by High Pressure Torsion (HPT). For a processing temperature ranging from 20°C to 300°C, the Severe Plastic Deformation (SPD) induces a significant grain size reduction (in a range of 50 to 150 nm) but also a strong disordering of the long range ordered L10 phase. However, Transmission Electron Microscopy (TEM) data clearly show that few ordered nanocrystals remain in the deformed state. The deformed material was annealed to achieve a nanoscaled long range ordered structure. The transformation proceeds via the nucleation and growth of ordered domains along grain boundaries. Aging at lower temperature (400°C) gives rise to a smallest domain size and thus the highest coercivity.

Info:

Periodical:

Solid State Phenomena (Volumes 172-174)

Edited by:

Yves Bréchet, Emmanuel Clouet, Alexis Deschamps, Alphonse Finel and Frédéric Soisson

Pages:

703-708

DOI:

10.4028/www.scientific.net/SSP.172-174.703

Citation:

A. Chbihi et al., "Disordering and Ordering in a Severely Deformed FePd Alloy", Solid State Phenomena, Vols. 172-174, pp. 703-708, 2011

Online since:

June 2011

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Price:

$35.00

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