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Mechanism for the α →ε phase transition in iron

Abstract : The mechanism of the α-ε transition in iron is reconsidered. A path in the Burgers description of the bcc/hcp transition, different from those previously considered, is proposed. It relies on the assumption that shear and shuffle are decoupled and require some peculiar magnetic order, different from that of α and ε phases as found in density-functional theory. Finally,we put forward an original mechanism for this transition, based on the successive shuffle motion of layers, which is akin to a nucleation-propagation process rather than to some uniform motion.
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https://hal-cea.archives-ouvertes.fr/cea-00771345
Contributor : Yves-Patrick Pellegrini <>
Submitted on : Saturday, January 12, 2013 - 2:59:24 PM
Last modification on : Friday, April 24, 2020 - 10:28:07 AM
Long-term archiving on: : Saturday, April 13, 2013 - 2:30:11 AM

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Bertrand Dupé, Bernard Amadon, Yves-Patrick Pellegrini, Christophe Denoual. Mechanism for the α →ε phase transition in iron. Physical Review B: Condensed Matter and Materials Physics, American Physical Society, 2013, 87 (2), pp.024103. ⟨10.1103/PhysRevB.87.024103⟩. ⟨cea-00771345⟩

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