Abstract
Post-irradiation annealing experiments are often used to obtain
clearer information on the nature of defects produced by
irradiation. However, their interpretation is not always
straightforward without the support of physical models. We
apply here a physically-based set of parameters for object kinetic
Monte Carlo (OKMC) simulations of the nanostructural
evolution of FeMnNi alloys under irradiation to the simulation
of their post-irradiation isochronal annealing, from 290 to
600 °C. The model adopts a “grey alloy” scheme, i.e. the solute
atoms are not introduced explicitly, only their effect on the
properties of point-defect clusters is. Namely, it is assumed
that both vacancy and SIA clusters are significantly slowed
down by the solutes. The slowing down increases with size
until the clusters become immobile. Specifically, the slowing
down of SIA clusters by Mn and Ni can be justified in terms
of the interaction between these atoms and crowdions in Fe.
The results of the model compare quantitatively well with
post-irradiation isochronal annealing experimental data, providing
clear insight into the mechanisms that determine the
disappearance or re-arrangement of defects as functions of
annealing time and temperature.
Details
Original language | English |
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Title of host publication | PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS |
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Subtitle of host publication | Physica Status Solidi C-Current Topics in Solid State Physics |
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Pages | 20-24 |
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Number of pages | 5 |
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Volume | 12/1-2 |
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DOIs | |
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Publication status | Published - Oct 2015 |
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Event | European Materials Research Society - 2014 Spring Meeting - EMRS, Lille, France Duration: 26 May 2014 → 30 May 2014 |
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Name | Physica Status Solidi (C) |
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Publisher | Wiley - John Wiley & Sons, Ltd |
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ISSN (Print) | 1862-6351 |
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Conference | European Materials Research Society - 2014 Spring Meeting |
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Country | France |
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City | Lille |
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Period | 2014-05-26 → 2014-05-30 |
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