Enhanced migration of mono-vacancies in AlxFeCoCrNi high entropy alloys

Xudong An, Eryang Lu, Ilja Makkonen, Guanying Wei, Jesper Byggmästar, Jiulong Zhu, Kenichiro Mizohata, Zhehao Chen, Flyura Djurabekova, Wangyu Hu, Huiqiu Deng, Tengfei Yang, Filip Tuomisto

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Sammanfattning

A profound understanding of the fundamental properties of point defects in high entropy alloys (HEAs) is essential to predict their irradiation properties. In this work, particle irradiation was performed to produce point-like defects in the samples, and positron annihilation spectroscopy experiments combined with advanced theoretical modeling to directly reveal the influence of Al content on mono-vacancy migration in AlxFeCoCrNi HEAs. The results show that the addition of Al to the alloy promotes the migration and recovery of irradiation-induced mono-vacancies. The Al enhanced mono-vacancy recovery is caused by the easier removal of mono-vacancies in Al-rich environments, while the delayed vacancy recovery occurs mainly in Fe-rich and/or Cr-rich environments. The modification of the complex energy landscape encountered by the diffusing species by introduction of trace elements may be an efficient approach for designing alloys with improved radiation tolerance.

Originalspråkengelska
Artikelnummer177704
TidskriftJournal of Alloys and Compounds
Volym1010
Antal sidor8
ISSN0925-8388
DOI
StatusPublicerad - 5 jan. 2025
MoE-publikationstypA1 Tidskriftsartikel-refererad

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