Primary radiation damage in bcc Fe and Fe–Cr crystals containing dislocation loops

Dmitry Terentyev; K. Vortler; C. Bjorkas; K. Nordlund; Lorenzo Malerba; Giovanni Bonny

doi:10.1016/j.jnucmat.2010.12.173

Primary radiation damage in bcc Fe and Fe–Cr crystals containing dislocation loops

Dmitry Terentyev, K. Vortler, C. Bjorkas, K. Nordlund, Lorenzo Malerba, Giovanni Bonny

Research output › peer-review

Abstract

Previous molecular dynamics studies of displacement cascades in Fe–Cr alloys have shown that the presence of Cr hardly affects the primary damage state as compared to pure Fe. In this work we studied the size distribution of self-interstitial clusters produced in cascades in Fe–Cr alloys containing 5–15% Cr, finding no statistically significant influence of Cr as compared to Fe. Moreover, since no significant differences due to the presence of Cr is found, we investigated the effect of cascades produced on pre-existing loops of ½ and interstitial-type in Fe. We found that the number of surviving Frenkel pairs decreases in the presence of loops, but only small loops can be dissolved by a cascade.

Original language	English
Pages (from-to)	1063-1066
Journal	Journal of Nuclear Materials
Volume	417
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jnucmat.2010.12.173
State	Published - 1 Oct 2011

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Cite this

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title = "Primary radiation damage in bcc Fe and Fe–Cr crystals containing dislocation loops",

abstract = "Previous molecular dynamics studies of displacement cascades in Fe–Cr alloys have shown that the presence of Cr hardly affects the primary damage state as compared to pure Fe. In this work we studied the size distribution of self-interstitial clusters produced in cascades in Fe–Cr alloys containing 5–15% Cr, finding no statistically significant influence of Cr as compared to Fe. Moreover, since no significant differences due to the presence of Cr is found, we investigated the effect of cascades produced on pre-existing loops of ½ and interstitial-type in Fe. We found that the number of surviving Frenkel pairs decreases in the presence of loops, but only small loops can be dissolved by a cascade.",

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AU - Terentyev, Dmitry

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AU - Nordlund, K.

AU - Malerba, Lorenzo

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AB - Previous molecular dynamics studies of displacement cascades in Fe–Cr alloys have shown that the presence of Cr hardly affects the primary damage state as compared to pure Fe. In this work we studied the size distribution of self-interstitial clusters produced in cascades in Fe–Cr alloys containing 5–15% Cr, finding no statistically significant influence of Cr as compared to Fe. Moreover, since no significant differences due to the presence of Cr is found, we investigated the effect of cascades produced on pre-existing loops of ½ and interstitial-type in Fe. We found that the number of surviving Frenkel pairs decreases in the presence of loops, but only small loops can be dissolved by a cascade.

KW - radiation damage

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