Nanostructured NiCoFeCr alloy with superior high-temperature irradiation resistance
Abstract The current research utilized a unique material design of nanostructured medium-entropy alloys with numerous defect sinks, offering great potential to withstand extreme conditions in advanced nuclear reactors. Hence, this work examined oxide dispersion strengthened (ODS)-NiCoFeCr alloy with nanosized grains after Ni +2 irradiation at 580 °C up to a peak damage of 101 displacements per atom. The alloy showed insignificant hardening and no detectable void formation following irradiation. Also, oxide nanoprecipitates and grains exhibited a limited growth of ~2 and ~5 nm, respectively, with irradiation. The volume-averaged dislocation length density remained on the order of ~10 14 m −2 , and the mean dislocation length showed a slight increase from 89 to 97 nm, with irradiation. A lower level of radiation-induced segregation was observed at the grain boundaries; however, the extent of RIS depended on the misorientation angles, with a maximum at 45.7° among the grain boundaries analyzed.
Authors
- Mingyang Li (ORCID: https://orcid.org/0000-0003-4546-6798)
- K. Mulewska (ORCID: https://orcid.org/0000-0001-6863-9431)
- Witold Chromiński (ORCID: https://orcid.org/0000-0002-5345-7667)
- Ruben Bjørge (ORCID: https://orcid.org/0000-0002-6310-7820)
- Ł. Kurpaska (ORCID: https://orcid.org/0000-0002-2970-4090)
- Pedro A. Ferreirós (ORCID: https://orcid.org/0000-0003-1782-9520)
- Randi Holmestad (ORCID: https://orcid.org/0000-0002-4274-5794)
- Per Erik Vullum (ORCID: https://orcid.org/0000-0001-7968-4879)
- Damian Kalita (ORCID: https://orcid.org/0000-0003-1135-6873)
- Sri Tapaswi Nori
- Yanwen Zhang (ORCID: https://orcid.org/0000-0003-1833-3885)
- Yongqin Chang (ORCID: https://orcid.org/0000-0003-0479-818X)
Institutions
- Warsaw University of Technology (PL)
- SINTEF (NO)
- Queen's University (CA)
- Norwegian University of Science and Technology (NO)
- National Centre for Nuclear Research (PL)
- SINTEF Industry (NO)
- University of Tennessee at Knoxville (US)
- VTT Technical Research Centre of Finland (FI)
- University of Science and Technology Beijing (CN)
Publication Details
- Journal
- npj Materials Degradation
- Published
- 2025-07-24
- DOI
- https://doi.org/10.1038/s41529-025-00642-2
- Citations
- 1
- Primary Topic
- High Entropy Alloys Studies
- Type
- article
- Field-Weighted Citation Impact
- 0.71
Funders
- European Commission
- Fundacja na rzecz Nauki Polskiej
- Canada Excellence Research Chairs, Government of Canada
- Horizon 2020
- European Regional Development Fund