Collision cascade effects near an edge dislocation dipole in alpha-Fe: Induced dislocation mobility and enhanced defect clustering
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Título: | Collision cascade effects near an edge dislocation dipole in alpha-Fe: Induced dislocation mobility and enhanced defect clustering |
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Autor/es: | Heredia-Avalos, Santiago | Denton Zanello, Cristian D. | Moreno Marín, Juan Carlos | Martinez, Enrique | Caturla, Maria J. |
Grupo/s de investigación o GITE: | Interacción de Partículas Cargadas con la Materia | Física de la Materia Condensada | Grupo de Nanofísica |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal | Universidad de Alicante. Departamento de Física Aplicada |
Palabras clave: | Molecular dynamics | Metals | Dislocations | Collision cascades | Radiation damage |
Área/s de conocimiento: | Física Aplicada |
Fecha de publicación: | ene-2021 |
Editor: | Elsevier |
Cita bibliográfica: | Journal of Nuclear Materials. 2021, 543: 152459. https://doi.org/10.1016/j.jnucmat.2020.152459 |
Resumen: | Collision cascades near a 1/2⟨111⟩{110} edge dipole in alpha-iron have been studied using molecular dynamics simulations for a recoil energy of 20 keV and two temperatures, 20 K and 300 K. These simulations show that the collision cascade induces the migration of the dislocations through glide along its slip plane. The motion of the dislocations starts at the peak of the collision cascade and expands a time scale much longer than the cascade duration, until restoring the equilibrium distance of the dipole, regardless of the damage produced by the cascade. At the initial stages, kinks are formed at the dislocation that enhance glide. When defects reach the dislocations, jogs are produced. We show that the initial dislocation motion is triggered by the shock wave of the collision cascade. The cascade morphology is also strongly influenced by the presence of the dislocations, having an elongated form at the peak of the displacement, which demonstrates the strong interaction of the dislocations with the cascade even at the early stages. Finally, we show that larger vacancy clusters are formed in the presence of dislocations compared to isolated cascades and that these clusters are larger for 300 K compared to 20 K. |
Patrocinador/es: | This work was partly supported by the Generalitat Valenciana through PROMETEO2017/139. This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 and 2019–2020 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. EM gratefully acknowledges support from the U.S. DOE, Office of Science, Office of Fusion Energy Sciences, and Office of Advanced Scientific Computing Research through the Scientific Discovery through Advanced Computing (SciDAC) project on Plasma-Surface Interactions (award no. DE-SC0008875). |
URI: | http://hdl.handle.net/10045/109435 |
ISSN: | 0022-3115 (Print) | 1873-4820 (Online) |
DOI: | 10.1016/j.jnucmat.2020.152459 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2020 Universidad de Alicante. Published by Elsevier B.V. |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1016/j.jnucmat.2020.152459 |
Aparece en las colecciones: | Investigaciones financiadas por la UE INV - IPCM - Artículos de Revistas INV - Física de la Materia Condensada - Artículos de Revistas INV - Grupo de Nanofísica - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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Heredia-Avalos_etal_2021_JNuclearMat_final.pdf | Versión final (acceso restringido) | 3,8 MB | Adobe PDF | Abrir Solicitar una copia |
Heredia-Avalos_etal_2021_JNuclearMat_preprint.pdf | Preprint (acceso abierto) | 7,44 MB | Adobe PDF | Abrir Vista previa |
movie1.avi | Supplementary Data 1 | 4,06 MB | Unknown | Abrir |
movie2.avi | Supplementary Data 2 | 4,29 MB | Unknown | Abrir |
movie3.avi | Supplementary Data 3 | 5,3 MB | Unknown | Abrir |
movie4.avi | Supplementary Data 4 | 4,74 MB | Unknown | Abrir |
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