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Author Bakaev, A. V. ♦ Terentyev, D. A. ♦ Zhurkin, E. E.
Source SpringerLink
Content type Text
Publisher Pleiades Publishing
File Format PDF
Copyright Year ©2017
Language English
Subject Keyword high-Cr ferritic-martensitic steels ♦ neutron irradiation ♦ radiation-induced defects ♦ dislocation loops ♦ segregation ♦ atomistic modeling ♦ Metropolis method ♦ Monte Carlo method ♦ Surfaces and Interfaces, Thin Films
Abstract Ferritic-martensitic steels alloyed with Cr and Ni are promising structural materials for the nuclear and thermonuclear power industry. Under the influence of neutron irradiation degradation of the plastic properties of these materials takes place as a result of the generation of extended defects such as dislocation loops, and the formation of new phases (precipitates). In this work the atomistic computer simulation of thermodynamic processes of the precipitation of alloying elements is carried out using the newest model of ternary Fe–Ni–Cr bcc (body-centered cubic) alloys and the Metropolis Monte Carlo method in combination with the method of classical Molecular Dynamics. The composition and microstructure of Cr–Ni clusters formed in defect-free alloys and alloys containing dislocation loops, depending on the temperature and concentrations of Ni and Cr, are studied. An increase in the Ni solubility limit in the presence of dislocation loops by 100–200 K, depending on the Ni concentration, is detected. The synergetic effect of Ni and Cr segregation near dislocation loops in ternary alloy is established: the presence of Ni weakens Cr segregation, whereas Cr can either attenuate or amplify Ni segregation depending on the concentration of Ni in the alloy, the temperature and the type (Burgers vector) of loop. In general, in ternary Fe–Cr–Ni alloys, the total segregation effect is less pronounced than in binary Fe–Ni and Fe–Cr alloys.
ISSN 10274510
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2017-06-15
Publisher Place Moscow
e-ISSN 18197094
Journal Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques
Volume Number 11
Issue Number 3
Page Count 8
Starting Page 606
Ending Page 613


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Source: SpringerLink