| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7964437 | Journal of Nuclear Materials | 2016 | 4 Pages |
Abstract
Molecular dynamics simulations have been performed to study the diffusion characteristics of di-self interstitial atom (di-SIA) in BCC Fe-Cr alloys and corresponding mass transport of Fe and Cratoms in the temperature range 600-1000Â K in the alloys with Cr content 5-25Â at%, which is relevant for ferritic/martensitic steels. An original treatment is proposed in this work to account for a mixed migration mode composed of the diffusion of the cluster itself and break-up into a pair of independent SIAs. The ratio of self-diffusion coefficients of Cr and Fe is found to exceed unity in Fe-5Cr and Fe-10Cr alloys, which implies that under cascade-producing damage, 3D-migrating small SIA clusters will effectively contribute to the segregation of Cr to neutral and SIA-preferential sinks, eventually causing radiation induced segregation.
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Nuclear Energy and Engineering
Authors
V.A. Ryabov, V.A. Pechenkin, V.L. Molodtsov, D. Terentyev,