File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Enhanced helium ion irradiation tolerance in a Fe-Co-Ni-Cr-Al-Ti high-entropy alloy with L12 nanoparticles

TitleEnhanced helium ion irradiation tolerance in a Fe-Co-Ni-Cr-Al-Ti high-entropy alloy with L1<inf>2</inf> nanoparticles
Authors
KeywordsHelium bubble
High-entropy alloy
L1 nanoparticles 2
Phase stability
Radiation-induced segregation
Issue Date2023
Citation
Journal of Materials Science and Technology, 2023, v. 143, p. 169-177 How to Cite?
AbstractL12-strengthened high entropy alloys (HEAs) with excellent room and high-temperature mechanical properties have been proposed as promising candidates as structural materials for advanced nuclear systems. However, knowledge about their radiation response is fairly limited. In the present work, a novel HEA with a high density of L12 nanoparticles was irradiated with He ion at 500 °C. Transmission electron microscope (TEM) and atom probe tomography (APT) were employed to study the evolution of microstructural stability and radiation-induced segregation. Similar to the single-phase FeCoNiCr HEA, the main microstructural features were numerous large faulted dislocation loops and helium bubbles. While the irradiation resistance of the present L12-strengthened HEA is much improved in terms of reduced bubble size, which could be attributed to the considerable He trapping efficiency of the coherent precipitate/matrix interface and the enhanced capability of the interface for damage elimination when the matrix channel width is narrow. APT analysis revealed that an inverse-Kirkendall-mechanism-dominated radiation-induced segregation (RIS) occurs around bubbles, where a significant Co enrichment and Ni depletion can be clearly observed. In addition, the competing dynamics of ballistic mixing and elemental clustering that raised from the irradiation-enhanced diffusion in a highly supersaturated matrix, along with the low precipitation nucleation barrier due to the small lattice misfit, lead to a dynamical precipitation dissolution and re-precipitation appears under irradiation. Such a promising phenomenon is expected to promote a potential self-healing effect and could in turn provide a sustainable irradiation tolerance over the operational lifetime of a reactor.
Persistent Identifierhttp://hdl.handle.net/10722/335891
ISSN
2023 Impact Factor: 11.2
2023 SCImago Journal Rankings: 2.309
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZhao, Y. L.-
dc.contributor.authorMeng, F. L.-
dc.contributor.authorYang, T.-
dc.contributor.authorLuan, J. H.-
dc.contributor.authorLiu, S. F.-
dc.contributor.authorYeli, G. M.-
dc.contributor.authorLin, W. T.-
dc.contributor.authorLiu, W. H.-
dc.contributor.authorLiu, X. J.-
dc.contributor.authorLiu, C. T.-
dc.contributor.authorKai, J. J.-
dc.date.accessioned2023-12-28T08:49:31Z-
dc.date.available2023-12-28T08:49:31Z-
dc.date.issued2023-
dc.identifier.citationJournal of Materials Science and Technology, 2023, v. 143, p. 169-177-
dc.identifier.issn1005-0302-
dc.identifier.urihttp://hdl.handle.net/10722/335891-
dc.description.abstractL12-strengthened high entropy alloys (HEAs) with excellent room and high-temperature mechanical properties have been proposed as promising candidates as structural materials for advanced nuclear systems. However, knowledge about their radiation response is fairly limited. In the present work, a novel HEA with a high density of L12 nanoparticles was irradiated with He ion at 500 °C. Transmission electron microscope (TEM) and atom probe tomography (APT) were employed to study the evolution of microstructural stability and radiation-induced segregation. Similar to the single-phase FeCoNiCr HEA, the main microstructural features were numerous large faulted dislocation loops and helium bubbles. While the irradiation resistance of the present L12-strengthened HEA is much improved in terms of reduced bubble size, which could be attributed to the considerable He trapping efficiency of the coherent precipitate/matrix interface and the enhanced capability of the interface for damage elimination when the matrix channel width is narrow. APT analysis revealed that an inverse-Kirkendall-mechanism-dominated radiation-induced segregation (RIS) occurs around bubbles, where a significant Co enrichment and Ni depletion can be clearly observed. In addition, the competing dynamics of ballistic mixing and elemental clustering that raised from the irradiation-enhanced diffusion in a highly supersaturated matrix, along with the low precipitation nucleation barrier due to the small lattice misfit, lead to a dynamical precipitation dissolution and re-precipitation appears under irradiation. Such a promising phenomenon is expected to promote a potential self-healing effect and could in turn provide a sustainable irradiation tolerance over the operational lifetime of a reactor.-
dc.languageeng-
dc.relation.ispartofJournal of Materials Science and Technology-
dc.subjectHelium bubble-
dc.subjectHigh-entropy alloy-
dc.subjectL1 nanoparticles 2-
dc.subjectPhase stability-
dc.subjectRadiation-induced segregation-
dc.titleEnhanced helium ion irradiation tolerance in a Fe-Co-Ni-Cr-Al-Ti high-entropy alloy with L1<inf>2</inf> nanoparticles-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jmst.2022.09.053-
dc.identifier.scopuseid_2-s2.0-85142710656-
dc.identifier.volume143-
dc.identifier.spage169-
dc.identifier.epage177-
dc.identifier.isiWOS:000918954100005-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats