High-temperature radiation resistance of NiCoFe medium-entropy alloy enabled by stable nanostructures and defect evolution mechanisms
The study innovatively examined a nano oxide dispersion-strengthened (ODS) NiCoFe medium-entropy alloy with nanosized grains to address the challenge of discovering structural materials for high-temperature irradiation applications, such as in advanced nuclear reactors. The ODS-NiCoFe alloy exhibite...
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Elsevier
2025-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425017387 |
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| author | Sri Tapaswi Nori Amin Esfandiarpour Damian Kalita Maciej Zieliński Katarzyna Mulewska Ruben Bjørge Per Erik Vullum Pedro A. Ferreirós Witold Chrominski Mingyang Li Yongqin Chang Yanwen Zhang Ryszard Diduszko Nagini Macha Sai Rama Krishna Malladi Daniel R. Mason Randi Holmestad Mikko Alava Lukasz Kurpaska |
| author_facet | Sri Tapaswi Nori Amin Esfandiarpour Damian Kalita Maciej Zieliński Katarzyna Mulewska Ruben Bjørge Per Erik Vullum Pedro A. Ferreirós Witold Chrominski Mingyang Li Yongqin Chang Yanwen Zhang Ryszard Diduszko Nagini Macha Sai Rama Krishna Malladi Daniel R. Mason Randi Holmestad Mikko Alava Lukasz Kurpaska |
| author_sort | Sri Tapaswi Nori |
| collection | DOAJ |
| description | The study innovatively examined a nano oxide dispersion-strengthened (ODS) NiCoFe medium-entropy alloy with nanosized grains to address the challenge of discovering structural materials for high-temperature irradiation applications, such as in advanced nuclear reactors. The ODS-NiCoFe alloy exhibited a nanoindentation hardness of 4.3 ± 0.9 GPa, representing a two-fold enhancement over the 2.0 ± 0.1 GPa of single-crystal NiCoFe. Dislocations were identified as the primary defect structures. Following irradiation (Ni2+, 580 °C), the average dislocation length density increased from ∼2.6 × 1013 m−2 to ∼6.1 × 1013 m−2, while the mean dislocation length decreased from 249 nm to 104 nm, contributing to a relative irradiation hardening of 25 %. Additionally, the study demonstrated the stability of various nanostructures, with only minor changes in the average sizes of nanoprecipitates and grains—from 6.7 ± 1.7 nm to 6.4 ± 1.7 nm, and from 73 ± 2 nm to 76 ± 2 nm, respectively, upon irradiation, suggesting effective defect annihilation at interfaces and grain boundaries. The alloy exhibited no observable irradiation-induced voids. Molecular dynamics simulations revealed irradiation resistance of the alloy through the absorption of vacancy clusters at grain boundaries and Shockley-dominant-dislocation chains and the absorption of interstitial clusters at grain boundaries, aided by the high mobility and three-dimensional motion of interstitial clusters. Thus, the findings demonstrate the high-temperature radiation resistance of the novel ODS-NiCoFe alloy, surpassing that of well-known ODS steels, using a correlative approach that combines experiments and simulations. |
| format | Article |
| id | doaj-art-cdf2c6b02eff4f63b9512305cd0a3c38 |
| institution | DOAJ |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-cdf2c6b02eff4f63b9512305cd0a3c382025-08-20T02:47:18ZengElsevierJournal of Materials Research and Technology2238-78542025-07-01375448546410.1016/j.jmrt.2025.07.079High-temperature radiation resistance of NiCoFe medium-entropy alloy enabled by stable nanostructures and defect evolution mechanismsSri Tapaswi Nori0Amin Esfandiarpour1Damian Kalita2Maciej Zieliński3Katarzyna Mulewska4Ruben Bjørge5Per Erik Vullum6Pedro A. Ferreirós7Witold Chrominski8Mingyang Li9Yongqin Chang10Yanwen Zhang11Ryszard Diduszko12Nagini Macha13Sai Rama Krishna Malladi14Daniel R. Mason15Randi Holmestad16Mikko Alava17Lukasz Kurpaska18NOMATEN Centre of Excellence, National Centre for Nuclear Research, Andrzeja Soltana 7, Otwock, 05-400, Poland; Corresponding author.NOMATEN Centre of Excellence, National Centre for Nuclear Research, Andrzeja Soltana 7, Otwock, 05-400, PolandNOMATEN Centre of Excellence, National Centre for Nuclear Research, Andrzeja Soltana 7, Otwock, 05-400, PolandNOMATEN Centre of Excellence, National Centre for Nuclear Research, Andrzeja Soltana 7, Otwock, 05-400, PolandNOMATEN Centre of Excellence, National Centre for Nuclear Research, Andrzeja Soltana 7, Otwock, 05-400, PolandNorwegian University of Science and Technology, Trondheim, NO-7491, Norway; Department of Materials and Nanotechnology, SINTEF Industry, Trondheim, NO-7491, NorwayNorwegian University of Science and Technology, Trondheim, NO-7491, Norway; Department of Materials and Nanotechnology, SINTEF Industry, Trondheim, NO-7491, NorwayCentre for Nuclear Safety, VTT Technical Research Centre of Finland Limited, Espoo, FI-02044, FinlandNOMATEN Centre of Excellence, National Centre for Nuclear Research, Andrzeja Soltana 7, Otwock, 05-400, Poland; Warsaw University of Technology, Faculty of Materials Science and Engineering, Wołoska 141, 02-507, Warsaw, PolandSchool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaSchool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaDepartment of Mechanical and Materials Engineering, Queen's University, Kingston, Ontario, K7L 3N6, Canada; Department of Materials Science & Engineering, University of Tennessee, Knoxville, TN, 37996, USANOMATEN Centre of Excellence, National Centre for Nuclear Research, Andrzeja Soltana 7, Otwock, 05-400, Poland; Institute of Microelectronics and Photonics, Lukasiewicz Research Network, Wolczynska 133, 01-919, Warsaw, PolandDepartment of Materials Science & Metallurgical Engineering, Indian Institute of Technology Hyderabad, Kandi, Telangana, 502285, IndiaDepartment of Materials Science & Metallurgical Engineering, Indian Institute of Technology Hyderabad, Kandi, Telangana, 502285, IndiaUnited Kingdom Atomic Energy Authority, Culham Science Centre, Abingdon, Oxfordshire, OX14 3DB, United KingdomNorwegian University of Science and Technology, Trondheim, NO-7491, NorwayNOMATEN Centre of Excellence, National Centre for Nuclear Research, Andrzeja Soltana 7, Otwock, 05-400, Poland; Department of Applied Physics, Aalto University, Aalto, Espoo, 11000, FinlandNOMATEN Centre of Excellence, National Centre for Nuclear Research, Andrzeja Soltana 7, Otwock, 05-400, PolandThe study innovatively examined a nano oxide dispersion-strengthened (ODS) NiCoFe medium-entropy alloy with nanosized grains to address the challenge of discovering structural materials for high-temperature irradiation applications, such as in advanced nuclear reactors. The ODS-NiCoFe alloy exhibited a nanoindentation hardness of 4.3 ± 0.9 GPa, representing a two-fold enhancement over the 2.0 ± 0.1 GPa of single-crystal NiCoFe. Dislocations were identified as the primary defect structures. Following irradiation (Ni2+, 580 °C), the average dislocation length density increased from ∼2.6 × 1013 m−2 to ∼6.1 × 1013 m−2, while the mean dislocation length decreased from 249 nm to 104 nm, contributing to a relative irradiation hardening of 25 %. Additionally, the study demonstrated the stability of various nanostructures, with only minor changes in the average sizes of nanoprecipitates and grains—from 6.7 ± 1.7 nm to 6.4 ± 1.7 nm, and from 73 ± 2 nm to 76 ± 2 nm, respectively, upon irradiation, suggesting effective defect annihilation at interfaces and grain boundaries. The alloy exhibited no observable irradiation-induced voids. Molecular dynamics simulations revealed irradiation resistance of the alloy through the absorption of vacancy clusters at grain boundaries and Shockley-dominant-dislocation chains and the absorption of interstitial clusters at grain boundaries, aided by the high mobility and three-dimensional motion of interstitial clusters. Thus, the findings demonstrate the high-temperature radiation resistance of the novel ODS-NiCoFe alloy, surpassing that of well-known ODS steels, using a correlative approach that combines experiments and simulations.http://www.sciencedirect.com/science/article/pii/S2238785425017387High-temperature irradiationOxide dispersion-strengthened NiCoFe medium-entropy alloyIrradiation-hardening resistancePhysical stability of nanostructuresIrradiation-swelling resistanceMolecular dynamics damage cascade simulations |
| spellingShingle | Sri Tapaswi Nori Amin Esfandiarpour Damian Kalita Maciej Zieliński Katarzyna Mulewska Ruben Bjørge Per Erik Vullum Pedro A. Ferreirós Witold Chrominski Mingyang Li Yongqin Chang Yanwen Zhang Ryszard Diduszko Nagini Macha Sai Rama Krishna Malladi Daniel R. Mason Randi Holmestad Mikko Alava Lukasz Kurpaska High-temperature radiation resistance of NiCoFe medium-entropy alloy enabled by stable nanostructures and defect evolution mechanisms Journal of Materials Research and Technology High-temperature irradiation Oxide dispersion-strengthened NiCoFe medium-entropy alloy Irradiation-hardening resistance Physical stability of nanostructures Irradiation-swelling resistance Molecular dynamics damage cascade simulations |
| title | High-temperature radiation resistance of NiCoFe medium-entropy alloy enabled by stable nanostructures and defect evolution mechanisms |
| title_full | High-temperature radiation resistance of NiCoFe medium-entropy alloy enabled by stable nanostructures and defect evolution mechanisms |
| title_fullStr | High-temperature radiation resistance of NiCoFe medium-entropy alloy enabled by stable nanostructures and defect evolution mechanisms |
| title_full_unstemmed | High-temperature radiation resistance of NiCoFe medium-entropy alloy enabled by stable nanostructures and defect evolution mechanisms |
| title_short | High-temperature radiation resistance of NiCoFe medium-entropy alloy enabled by stable nanostructures and defect evolution mechanisms |
| title_sort | high temperature radiation resistance of nicofe medium entropy alloy enabled by stable nanostructures and defect evolution mechanisms |
| topic | High-temperature irradiation Oxide dispersion-strengthened NiCoFe medium-entropy alloy Irradiation-hardening resistance Physical stability of nanostructures Irradiation-swelling resistance Molecular dynamics damage cascade simulations |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425017387 |
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