Stability of vacancy clusters in FeCr alloys: A study of the Cr concentration dependence
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http://hdl.handle.net/10045/38791
Title: | Stability of vacancy clusters in FeCr alloys: A study of the Cr concentration dependence |
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Authors: | Sampedro, Jesús M. | Río Redondo, Emma del | Caturla, Maria J. | Caro, Alfredo | Caro, Magdalena | Perlado Martín, José Manuel |
Research Group/s: | Física de la Materia Condensada | Grupo de Nanofísica |
Center, Department or Service: | Universidad de Alicante. Departamento de Física Aplicada | Universidad de Alicante. Instituto Universitario de Materiales |
Keywords: | Fe–Cr alloys | Fusion | Fission | Radiation damage | Vacancy cluster defects | Simulation |
Knowledge Area: | Física Aplicada |
Issue Date: | 15-May-2013 |
Publisher: | Elsevier |
Citation: | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 2013, 303: 46-50. doi:10.1016/j.nimb.2012.09.024 |
Abstract: | Fe–Cr based alloys are the leading structural material candidates in the design of next generation reactors due to their high resistance to swelling and corrosion. Despite these good properties there are others, such as embrittlement, which require a higher level of understanding in order to improve aspects such as safety or lifetime of the reactors. The addition of Cr improves the behavior of the steels under irradiation, but not in a monotonic way. Therefore, understanding the changes in the Fe–Cr based alloys microstructure induced by irradiation and the role played by the alloying element (Cr) is needed in order to predict the response of these materials under the extreme conditions they are going to support. In this work we perform a study of the effect of Cr concentration in a bcc Fe–Cr matrix on formation and binding energies of vacancy clusters up to 5 units. The dependence of the calculated formation and binding energy is investigated with two empirical interatomic potentials specially developed to study radiation damage in Fe–Cr alloys. Results are very similar for both potentials showing an increase of the defect stability with the cluster size and no real dependence on Cr concentration for the binding energy. |
Sponsor: | This work has been partially supported by the European Commission within the FP7 project GETMAT (Grant agreement number 212175) and HiPER (Grant agreement number 211737. FP7-INFRASTRUCTURES-2007-1), the VI Spanish National Project ENE2008-06403-C06-06, the European Union Keep in Touch Program on Inertial Confinement Fusion (ref. 08/061), and the European Fusion Development Agreement (EFDA). A.C. and M.C. acknowledge support from the Los Alamos’s Laboratory Directed Research and Development Program. AC also acknowledges support from the DOE’s Energy Frontier Research Center (EFRC) for Materials under Irradiation and Mechanical Extremes. This work also contributes to the International Atomic Energy Agency CRP SMoRE program. |
URI: | http://hdl.handle.net/10045/38791 |
ISSN: | 0168-583X (Print) | 1872-9584 (Online) |
DOI: | 10.1016/j.nimb.2012.09.024 |
Language: | eng |
Type: | info:eu-repo/semantics/article |
Peer Review: | si |
Publisher version: | http://dx.doi.org/10.1016/j.nimb.2012.09.024 |
Appears in Collections: | INV - Física de la Materia Condensada - Artículos de Revistas INV - Grupo de Nanofísica - Artículos de Revistas |
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2013_Sampedro_etal_NIMB_final.pdf | Versión final (acceso restringido) | 888,76 kB | Adobe PDF | Open Request a copy |
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