Kinetics of Early Decomposition Stages
in Diluted bcc Fe–Сu–Ni–Al Alloy: MC+MD Simulation
I. N. Kar’kina, L E. Kar’kinaa, *, Yu. N. Gornostyreva, b, and A. P. Korzhavyia, c
Translated by A. Kazantsev
a Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620990 Russia
b Institute of Quantum Materials Science, Yekaterinburg, 620007 Russia
c Department of Materials Science and Engineering, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
Correspondence to: * e-mail: lidiakarkina@gmail.com
Received 26 November, 2018
Abstract—A combined approach including the Monte Carlo and molecular-dynamics simulation, decomposition kinetics and segregation formation in the multicomponent low-alloy Fe–1.5Cu–2Ni–1.5Al (at %) alloy is studied. It is shown that the formation of Cu nanoparticles surface-enriched with Ni and Al (coprecipitation mode) includes several stages: (i) the formation of clusters consisting of several Cu atoms, (ii) their enrichment with Ni and Al atoms, and (iii) redistribution of Ni and Al atoms with the formation of a surface layer providing stabilization of Cu nanoparticles. Observed structural features of segregations and their stability in Fe–Cu–Ni–Al alloys is discussed.
DOI: 10.1134/S1063783419040152