Please use this identifier to cite or link to this item:
|Title:||Role of magnetic degrees of freedom in a scenario of phase transformations in steel|
|Authors:||Razumov, I. K.|
Boukhvalov, D. V.
Petrik, M. V.
Urtsev, V. N.
Shmakov, A. V.
Katsnelson, M. I.
Gornostyrev, Yu. N.
|Publisher:||American Physical Society|
|Citation:||Role of magnetic degrees of freedom in a scenario of phase transformations in steel / I. K. Razumov, D. V. Boukhvalov, M. V. Petrik, et al. — DOI 10.1103/PhysRevB.90.094101 // Physical Review B - Condensed Matter and Materials Physics. — 2014. — Vol. 90. — Iss. 9. — 094101.|
|Abstract:||The diversity of mesostructures formed in steel at cooling from a high-temperature austenite (γ) phase is determined by the interplay of shear reconstructions of crystal lattice and diffusion of carbon. Combining first-principles calculations with large-scale phase-field simulations we demonstrate a decisive role of magnetic degrees of freedom in the formation of energy relief along the Bain path of γ-α transformation and, thus, in this interplay. We show that there is the main factor, namely, the magnetic state of iron and its evolution with temperature which controls the change in character of the transformation. Based on the computational results we propose a simple model which reproduces, in good agreement with experiment, the most important curves of the phase transformation in Fe-C, namely, the lines relevant to a start of ferrite, bainite, and martensite transformations. Phase-field simulations within the model describe qualitatively typical patterns at these transformations. © 2014 American Physical Society.|
|Appears in Collections:||Научные публикации, проиндексированные в SCOPUS и WoS CC|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.