The role of Cr concentration and temperature on cavity swelling with co-injected helium in dual-ion irradiated Fe and Fe-Cr alloys
The level of chromium plays an essential role in irradiation tolerance of Fe-Cr ferritic alloys. However, conflicting results have been reported regarding the dependence of cavity swelling under irradiation on Cr level and temperature. Here, we have performed a comprehensive set of simultaneous dual...
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Elsevier
2022-11-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127522007560 |
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| author | Yan-Ru Lin Arunodaya Bhattacharya Da Chen Yajie Zhao Ji-Jung Kai Jean Henry Steven J. Zinkle |
| author_facet | Yan-Ru Lin Arunodaya Bhattacharya Da Chen Yajie Zhao Ji-Jung Kai Jean Henry Steven J. Zinkle |
| author_sort | Yan-Ru Lin |
| collection | DOAJ |
| description | The level of chromium plays an essential role in irradiation tolerance of Fe-Cr ferritic alloys. However, conflicting results have been reported regarding the dependence of cavity swelling under irradiation on Cr level and temperature. Here, we have performed a comprehensive set of simultaneous dual-ion (Ni + He) irradiations to high dose (∼30 displacements per atom, dpa) at 400–550 °C on a series of ultra-high purity Fe and Fe-Cr binary alloys (3–14 wt.%Cr). Helium co-implantation rates of 0.1 and 10 appm He/dpa were selected to examine He synergistic effects relevant for fission and fusion reactor conditions, respectively. Cavities were observed in all irradiated samples by transmission electron microscopy. The results show that higher He implantation rate causes a shift in the swelling peak to higher temperatures in both Fe and Fe-Cr alloys. When assuming smaller cavities as biased sinks, the non-monotonic nature of the cavity swelling behavior is related to the ratio of biased to unbiased point defect sink strengths. Cr-enriched precipitates were observed in Fe-14Cr irradiated at 400 °C by atom probe tomography. Our analysis suggests the formation of Cr-enriched precipitates could suppress cavity swelling for Fe-Cr alloys with Cr content above 10 wt%. |
| first_indexed | 2024-04-11T08:34:25Z |
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| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-11T08:34:25Z |
| publishDate | 2022-11-01 |
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| spelling | doaj.art-780b8735a786402b8e8cf00e82c09b722022-12-22T04:34:22ZengElsevierMaterials & Design0264-12752022-11-01223111134The role of Cr concentration and temperature on cavity swelling with co-injected helium in dual-ion irradiated Fe and Fe-Cr alloysYan-Ru Lin0Arunodaya Bhattacharya1Da Chen2Yajie Zhao3Ji-Jung Kai4Jean Henry5Steven J. Zinkle6Department of Material Science and Engineering, University of Tennessee, Knoxville, TN 37996, USA; Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA; Corresponding author at: Oak Ridge National Laboratory, PO Box 2008, MS6140, Oak Ridge, TN 37831, USA.Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USACentre for Advanced Nuclear Safety and Sustainable Development, City University of Hong Kong, Kowloon Tong, Hong KongDepartment of Material Science and Engineering, University of Tennessee, Knoxville, TN 37996, USACentre for Advanced Nuclear Safety and Sustainable Development, City University of Hong Kong, Kowloon Tong, Hong KongCEA, DEN-Service de Recherches Métallurgiques Appliquées, Laboratoire d’Analyse Microstructurale des Matériaux, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceDepartment of Material Science and Engineering, University of Tennessee, Knoxville, TN 37996, USA; Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA; Department of Nuclear Engineering, University of Tennessee, Knoxville, TN 37996, USAThe level of chromium plays an essential role in irradiation tolerance of Fe-Cr ferritic alloys. However, conflicting results have been reported regarding the dependence of cavity swelling under irradiation on Cr level and temperature. Here, we have performed a comprehensive set of simultaneous dual-ion (Ni + He) irradiations to high dose (∼30 displacements per atom, dpa) at 400–550 °C on a series of ultra-high purity Fe and Fe-Cr binary alloys (3–14 wt.%Cr). Helium co-implantation rates of 0.1 and 10 appm He/dpa were selected to examine He synergistic effects relevant for fission and fusion reactor conditions, respectively. Cavities were observed in all irradiated samples by transmission electron microscopy. The results show that higher He implantation rate causes a shift in the swelling peak to higher temperatures in both Fe and Fe-Cr alloys. When assuming smaller cavities as biased sinks, the non-monotonic nature of the cavity swelling behavior is related to the ratio of biased to unbiased point defect sink strengths. Cr-enriched precipitates were observed in Fe-14Cr irradiated at 400 °C by atom probe tomography. Our analysis suggests the formation of Cr-enriched precipitates could suppress cavity swelling for Fe-Cr alloys with Cr content above 10 wt%.http://www.sciencedirect.com/science/article/pii/S0264127522007560Fe-Cr ferritic alloysCavity/void swellingHelium synergistic effectAtom probe tomographyTransmission electron microscopy |
| spellingShingle | Yan-Ru Lin Arunodaya Bhattacharya Da Chen Yajie Zhao Ji-Jung Kai Jean Henry Steven J. Zinkle The role of Cr concentration and temperature on cavity swelling with co-injected helium in dual-ion irradiated Fe and Fe-Cr alloys Materials & Design Fe-Cr ferritic alloys Cavity/void swelling Helium synergistic effect Atom probe tomography Transmission electron microscopy |
| title | The role of Cr concentration and temperature on cavity swelling with co-injected helium in dual-ion irradiated Fe and Fe-Cr alloys |
| title_full | The role of Cr concentration and temperature on cavity swelling with co-injected helium in dual-ion irradiated Fe and Fe-Cr alloys |
| title_fullStr | The role of Cr concentration and temperature on cavity swelling with co-injected helium in dual-ion irradiated Fe and Fe-Cr alloys |
| title_full_unstemmed | The role of Cr concentration and temperature on cavity swelling with co-injected helium in dual-ion irradiated Fe and Fe-Cr alloys |
| title_short | The role of Cr concentration and temperature on cavity swelling with co-injected helium in dual-ion irradiated Fe and Fe-Cr alloys |
| title_sort | role of cr concentration and temperature on cavity swelling with co injected helium in dual ion irradiated fe and fe cr alloys |
| topic | Fe-Cr ferritic alloys Cavity/void swelling Helium synergistic effect Atom probe tomography Transmission electron microscopy |
| url | http://www.sciencedirect.com/science/article/pii/S0264127522007560 |
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