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New insights into microstructure of irradiated beryllium based on experiments and computer simulations

Klimenkov, M.; Vladimirov, P.; Jäntsch, U.; Kuksenko, V.; Rolli, R.; Möslang, A.; Zimber, N.

Abstract:
The microstructural response of beryllium after neutron irradiation at various temperatures (643–923 K) was systematically studied using analytical transmission electron microscope that together with outcomes from advanced atomistic modelling provides new insights in the mechanisms of microstructural changes in this material. The most prominent feature of microstructural modification is the formation of gas bubbles, which is revealed at all studied irradiation temperatures. Except for the lowest irradiation temperature, gas bubbles have the shape of thin hexagonal prisms with average height and diameter increasing with temperature. A high number density of small bubbles is observed within grains, while significantly larger bubbles are formed along high-angle grain boundaries (GB). Denuded zones (DZ) nearly free from bubbles are found along both high- and low-angle grain boundaries. Precipitations of secondary phases (mainly intermetallic Al-Fe-Be) were observed inside grains, along dislocation lines and at GBs. EDX analysis has revealed homogeneous segregation of chromium and iron along GBs. The observed features are discussed with respect to the available atomistic modelling results. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000120365
Veröffentlicht am 14.08.2020
Originalveröffentlichung
DOI: 10.1038/s41598-020-64654-5
Scopus
Zitationen: 1
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Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Angewandte Werkstoffphysik (IAM-AWP)
Institut für Angewandte Materialien - Werkstoff- und Biomechanik (IAM-WBM)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2045-2322
KITopen-ID: 1000120365
HGF-Programm 31.03.06 (POF III, LK 01) Brutblanket-Entwicklung
Erschienen in Scientific reports
Verlag Nature Research
Band 10
Heft 1
Seiten Article: 8042
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Gefördert vom Ministerium für Wissenschaft, Forschung und Kunst Baden-Württemberg (MWK) im Rahmen des Open-Access-Förderprogramms "BW BigDIWA"
Nachgewiesen in Scopus
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