Phase field modelling voids nucleation and growth in binary systems
We present a comprehensive study of voids formation, nucleation and growth in a prototype model of binary alloys subjected to irradiation by using a combined approach based on phase field and rate theories. It is shown that voids formation is caused by interaction of irradiation-produced vacancies...
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| Date: | 2018 |
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| Main Authors: | , , , , , , |
| Format: | Article |
| Language: | English |
| Published: |
Інститут фізики конденсованих систем НАН України
2018
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| Series: | Condensed Matter Physics |
| Online Access: | http://dspace.nbuv.gov.ua/handle/123456789/157046 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Phase field modelling voids nucleation and growth in binary systems / D.O. Kharchenko, V.O. Kharchenko, Y.M. Ovcharenko, O.B. Lysenko, I.A. Shuda, L. Wu, R. Pan // Condensed Matter Physics. — 2018. — Т. 21, № 1. — С. 13002: 1–21. — Бібліогр.: 76 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Summary: | We present a comprehensive study of voids formation, nucleation and growth in a prototype model of binary
alloys subjected to irradiation by using a combined approach based on phase field and rate theories. It is shown
that voids formation is caused by interaction of irradiation-produced vacancies through elastic deformation of
a lattice and vacancy coupling with composition field of the alloy. Phase diagrams illustrating the formation of
states related to solid solution, phase decomposition, and patterning are obtained. Formation of voids from
supersaturated ensemble of vacancies is accompanied by composition rearrangement of alloy components. It
was found that elastic inhomogeneity leading to the formation of anisotropic precipitates in an initially prepared
binary alloy results in the formation of a void super-lattice under irradiation. It was shown that voids nucleate
and grow with dose according to diffusion controlled precipitation processes, where universal dynamics of voids
growth is revealed. Estimations of main quantitative and statistical characteristics of voids by using material
parameters relevant to most of alloys and steels give good agreement with experimental observations. |
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