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Journal Articles Physical Review B: Condensed Matter and Materials Physics (1998-2015) Year : 2013

Mechanism for the α →ε phase transition in iron

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Bernard Amadon
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Yves-Patrick Pellegrini

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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cea-00771345 , version 1 (12-01-2013)

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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 (1998-2015), 2013, 87 (2), pp.024103. ⟨10.1103/PhysRevB.87.024103⟩. ⟨cea-00771345⟩

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