Journal
JOURNAL OF NUCLEAR MATERIALS
Volume 500, Issue -, Pages 92-109Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2017.12.022
Keywords
Ab initio calculations; Radiation damage; Fe alloys; Interstitials; Interstitial clusters
Funding
- Euratom research and training programme [661913, 633053]
- European project PERFORM60
- European project MATISSE [604862]
- PRACE (project MORPHO - Modeling Radiation damage: characterization of elementary PHysical prOcesses) [2016153636]
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The energetics, defect volume and magnetic properties of single SIAs and small SIA clusters up to size 6 have been calculated by DFT for different configurations like the parallel < 110 > dumbbell, the non parallel < 110 > dumbbell and the C15 structure. The most stable configurations of each type have been further analyzed to determine the influence on their stability of various solute atoms (Ti, V, Cr, Mn, Co, Ni, Cu, Mo, W, Pd, Al, Si, P), relevant for steels used under irradiation. The results show that the presence of solute atoms does not change the relative stability order among SIA clusters. The small SIA clusters investigated can bind to both undersized and oversized solutes. Several descriptors have been considered to derive interesting trends from results. It appears that the local atomic volume available for the solute is the main physical quantity governing the binding energy evolution, whatever the solute type (undersized or oversized) and the cluster configuration (size and type). (c) 2018 The Authors. Published by Elsevier B.V. All rights reserved.
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