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 requires 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 successive shuffle motion of layers, which is akin to a nucleation-propagation process rather than to some uniform motion.

6 pages, 5 figures

References in corpus (6)

• First-Principles Elastic Constants for the hcp Transition Metals Fe, Co, and Re at High Pressure
• Dynamics of the magnetic and structural a -> e phase transition in Iron
• Electronic correlations at the alpha-gamma structural phase transition in paramagnetic iron
• About the strength of correlation effects in the electronic structure of iron
• Orbital selective local moment formation in iron: first principle route to an effective model
• Effect of magnetic state on the $\gamma -\alpha$ transition in iron: First-principle calculations of the Bain transformation path

Cited by in corpus (8)

• Massively parallel symplectic algorithm for coupled magnetic spin dynamics and molecular dynamics
• Coexistence pressure for a martensitic transformation from theory and experiment: revisiting the bcc-hcp transition of iron under pressure
• Pressure induced bcc to hcp transition in Fe: Magnetism-driven structure transformation
• Magneto-structural transformations via a solid-state nudged elastic band method: Application to iron under pressure
• Effect of pressure cycling on Iron: Signatures of an electronic instability and unconventional superconductivity
• Phase Transformation Kinetics Model for Metals
• Slip-dominated structural transitions
• Phase Transition of Iron-based Single Crystals at Extreme Strain Rates under Dynamic Loadings