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Б.Е. Винтайкин, Н.А. Беляков, И.Б. Чудаков, П.А. Саидахметов, Т.А. Турмамбеков
10
Physical modeling of nanostructures formation in alloys
with high damping capacity on the basis of Fe-Cr
© B.E. Vintaykin
1
, N.A. Belyakov
1
, I.B. Chudakov
2
,
P.A. Saidakhmetov
3
, T.A. Turmambekov
4
1
Bauman Moscow State Technical University, Moscow, 105005, Russia
2
Bardin Central Institute of Ferrous Metals, Moscow, 105005, Russia
3
Auezov South Kazakhstan University, Shimkent, 160012, RK
4
IKTU n.a. H.A. Jasavi, Turkestan, 160315, RK
The article considers application of physical modeling techniques of the processes of
nanostructure production as a result of disintegration of alloys based on bcc solid solu-
tions in the systems of Fe–Cr Fe–Cr–Co into ferromagnetic and paramagnetic phases
with the purpose of predicting the best ways of obtaining materials with high damping
properties. The requirements for the optimal structure of ferromagnetic alloys with high
damping properties and methods of its obtaining are analysed.
Two approaches to ob-
taining high damping properties by means of a multi-stage heat treatment of the alloys
are selected as promising. The alloy with a structure of ferromagnetic sponge was select-
ed as a first approach, as a second - one of the 12 basic types of structures appearing in
the process of disintegration of alloys based on Fe–Cr, but with a small difference in the
compositions of the phases and slight differences in phase magnetizations. Modeling was
based on the direct minimization of the free energy of a two-phase alloy, with due regard
for the contributions: chemical, magnetic and atomic ordering, the elastic phase defor-
mations, and some others.
The used approach is based on the modeling processes and
allows replacing real experiments with computing thereby it can accelerate the process
of alloy structure and heat treatments optimization and reduce its cost. The optimum
types of nanostructures for producing damping properties and schemes for their obtain-
ing are considered. Domains of instability and metastability of solid solutions are calcu-
lated as well as prospective ranges of compositions and multistage thermal treatment
temperatures for obtaining high damping properties of these alloys.
Keywords:
thermodinamic modeling, solid solutions,
high damping properties alloys,
spinodal gap.
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