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Ordering, phase separation, and phase transformations in Fe-M alloys

,
Physical-Technical Institute of the Ural Branch of the Russian Academy of Sciences, Kirova str. 132, Izhevsk, 426001, Russian Federation

Concepts of ordering, phase separation, and phase transformations in metallic solid solutions are discussed in the context of the latest experimental data on the microstructure of Fe-M alloys. It is shown that the type of chemical interaction between alloy component atoms depends on the degree of the localization of 3d-valence electrons on atoms rather than on the ratio of energies of ordering in different coordination shells. The morphology of the products of phase transformations in alloys with a tendency to ordering or phase separation is considered, and the known mechanisms of phase decomposition are analyzed. The decomposition of alloys having a tendency to ordering and to phase separation is described in thermodynamic terms. It is shown that solid-solution fields in phase diagrams are in fact regions where the alloys have a tendency to phase separation and where, at certain correlations between free-energy components, separation microstructures are formed. It is noted that phase transformations in alloys can occur at different levels of the structure of matter: the ’primary’ occur at the level of changes (ordering-phase separation) in the electronic structure, and the ’secondary’ are realized at the level of changes (order-disorder) in the microstructure.

Fulltext pdf (425 KB)
Fulltext is also available at DOI: 10.1070/PU2006v049n06ABEH003175
PACS: 64.60.Cn, 64.75.+g, 82.60.Lf (all)
DOI: 10.1070/PU2006v049n06ABEH003175
URL: https://ufn.ru/en/articles/2006/6/c/
000241498900003
2-s2.0-33750406729
2006PhyU...49..593U
Citation: Ustinovshchikov Yu I, Pushkarev B E "Ordering, phase separation, and phase transformations in Fe-M alloys" Phys. Usp. 49 593–603 (2006)
BibTexBibNote ® (generic)BibNote ® (RIS)Medline RefWorks
RT Journal
T1 Ordering, phase separation, and phase transformations in Fe-M alloys
A1 Ustinovshchikov,Yu.I.
A1 Pushkarev,B.E.
PB Physics-Uspekhi
PY 2006
FD 10 Jun, 2006
JF Physics-Uspekhi
JO Phys. Usp.
VO 49
IS 6
SP 593-603
DO 10.1070/PU2006v049n06ABEH003175
LK https://ufn.ru/en/articles/2006/6/c/

Оригинал: Устиновщиков Ю И, Пушкарев Б Е «Упорядочение, расслоение и фазовые превращения в сплавах Fe-M» УФН 176 611–621 (2006); DOI: 10.3367/UFNr.0176.200606c.0611

References (70) Cited by (23)

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