Title:
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Interaction of He and He-V clusters with self-interstitials and dislocations defects in bcc Fe
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Author:
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Terentyev, Dimitry; Anento Moreno, Napoleón; Serra Tort, Ana María; Ortiz, C. J.; zhurkin, E. E.
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Other authors:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental; Universitat Politècnica de Catalunya. SIMCON - Grup de Recerca de Simulació per Ordinador en Matèria Condensada |
Abstract:
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The understanding of helium effects in synergy with radiation damage is crucial for the development of structural steels for fusion applications. Recent investigations in ultra-pure iron, taken as a basic model, have shown a drastic impact of dual beam (helium and iron) exposure on the accumulation of radiation-induced dislocation loops in terms of strong bias towards a(0)/2 < 111 > loops, while a(0)< 100 > loops are mostly observed upon iron ion beam. In this work we perform a series of atomistic studies to rationalize possible mechanisms through which He could affect the evolution of microstructure and bias the population of a(0)/2 < 111 > loops. It is shown that He atoms are dragged by gliding a(0)/2 < 111 > loops. This strongly suppresses loop diffusivity and in turn it prohibits the mutual interaction of a(0)/2 < 111 > loops, being prerequisite of the formation of a(0)< 100 > loops, as well as it reduces the disappearance of a(0)/2 < 111 > loops at sinks. A scenario for the microstructural evolution in the single-and dual-beam conditions is discussed. (C) 2014 Elsevier B. V. All rights reserved. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Matemàtiques i estadística::Anàlisi numèrica::Modelització matemàtica -Numerical analysis -EDGE DISLOCATIONS -ALPHA-IRON -COMPUTER-SIMULATION -RADIATION-DAMAGE -FERRITIC ALLOY -PURE IRON -HELIUM -CR -METALS -MODEL -Anàlisi numèrica -Classificació AMS::65 Numerical analysis |
Rights:
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http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Document type:
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Article - Submitted version Article |
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