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Radiation stability of nanocrystalline single-phase multicomponent alloys

Published online by Cambridge University Press:  20 February 2019

Emil Levo*
Affiliation:
Department of Physics, University of Helsinki, Helsinki, FIN-00014, Finland
Fredric Granberg*
Affiliation:
Department of Physics, University of Helsinki, Helsinki, FIN-00014, Finland
Daniel Utt
Affiliation:
Fachgebiet Materialmodellierung, Institut für Materialwissenschaft, TU Darmstadt, D-64287 Darmstadt, Germany
Karsten Albe
Affiliation:
Fachgebiet Materialmodellierung, Institut für Materialwissenschaft, TU Darmstadt, D-64287 Darmstadt, Germany
Kai Nordlund
Affiliation:
Department of Physics, University of Helsinki, Helsinki, FIN-00014, Finland
Flyura Djurabekova
Affiliation:
Helsinki Institute of Physics, University of Helsinki, FIN-00014, Finland; Department of Physics, University of Helsinki, Helsinki, FIN-00014, Finland; and Department of Plasma Physics, National Research Nuclear University MEPHI, 31 Moscow, Russia
*
a)Address all correspondence to these authors. e-mail: emil.levo@helsinki.fi
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Abstract

In search of materials with better properties, polycrystalline materials are often found to be superior to their respective single crystalline counterparts. Reduction of grain size in polycrystalline materials can drastically alter the properties of materials. When the grain sizes reach the nanometer scale, the improved mechanical response of the materials make them attractive in many applications. Multicomponent solid-solution alloys have shown to have a higher radiation tolerance compared with pure materials. Combining these advantages, we investigate the radiation tolerance of nanocrystalline multicomponent alloys. We find that these alloys withstand a much higher irradiation dose, compared with nanocrystalline Ni, before the nanocrystallinity is lost. Some of the investigated alloys managed to keep their nanocrystallinity for twice the irradiation dose as pure Ni.

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Article
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Copyright © Materials Research Society 2019 

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