Bubble formation in helium-implanted nanostructured ferritic alloys at elevated temperatures
Abstract
Helium bubble formation was examined by scanning/transmission electron microscopy (S/TEM) in Fe-9/10Cr binary alloys and two dispersion strengthened nanostructured alloys (CNA3 and 14YWT containing 5–10 nm diameter carbide and oxide particles, respectively) after ex-situ and in-situ He implantation to ~10,000 appm at 500 to 900 °C. The combination of high-resolution STEM images and electron energy loss spectroscopy (EELS) revealed that the Y-Ti-O nanoparticles in 14YWT were uniformly distributed and exhibited a one-to-one relationship for bubble attachment to the nanoclusters. In the in-situ experiment at 900 °C, grain boundary cracking was severe in the Fe-10Cr model alloy, but not in the nanostructured alloys. From 500 to 900 °C, the bubble size generally increased with increasing irradiation temperature, while the bubble density decreased with increasing temperature. At the same temperatures, the bubble size in the implanted materials was in the order of Fe-9/10Cr > CNA3 > 14YWT, while the bubble density showed the opposite order. The observed bubble number densities for the nanostructured alloys are comparable to the nanoparticle density, suggesting that the nanoparticles in both alloys were effective in trapping He. Overall, our results indicate that very high He concentrations can be managed in nanostructured alloys by sequestering the helium intomore »
- Authors:
-
- Univ. of Tennessee, Knoxville, TN (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Industrial Technology Research Inst., Hsinchu (Taiwan)
- Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Nuclear Energy (NE); USDOE Office of Science (SC), Fusion Energy Sciences (FES); EUROfusion Consortium
- OSTI Identifier:
- 1813131
- Grant/Contract Number:
- AC05-00OR22725; AC07-051D14517; SC0006661; 633053
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Acta Materialia
- Additional Journal Information:
- Journal Volume: 217; Journal ID: ISSN 1359-6454
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; nanostructured ferritic alloy; ODS alloy; in-situ TEM; radiation effects; helium bubble
Citation Formats
Lin, Yan-Ru, Chen, Wei-Ying, Tan, Lizhen, Hoelzer, David T., Yan, Zhanfeng, Hsieh, Cheng-Yu, Huang, Chun-Wei, and Zinkle, Steven John. Bubble formation in helium-implanted nanostructured ferritic alloys at elevated temperatures. United States: N. p., 2021.
Web. doi:10.1016/j.actamat.2021.117165.
Lin, Yan-Ru, Chen, Wei-Ying, Tan, Lizhen, Hoelzer, David T., Yan, Zhanfeng, Hsieh, Cheng-Yu, Huang, Chun-Wei, & Zinkle, Steven John. Bubble formation in helium-implanted nanostructured ferritic alloys at elevated temperatures. United States. https://doi.org/10.1016/j.actamat.2021.117165
Lin, Yan-Ru, Chen, Wei-Ying, Tan, Lizhen, Hoelzer, David T., Yan, Zhanfeng, Hsieh, Cheng-Yu, Huang, Chun-Wei, and Zinkle, Steven John. Thu .
"Bubble formation in helium-implanted nanostructured ferritic alloys at elevated temperatures". United States. https://doi.org/10.1016/j.actamat.2021.117165. https://www.osti.gov/servlets/purl/1813131.
@article{osti_1813131,
title = {Bubble formation in helium-implanted nanostructured ferritic alloys at elevated temperatures},
author = {Lin, Yan-Ru and Chen, Wei-Ying and Tan, Lizhen and Hoelzer, David T. and Yan, Zhanfeng and Hsieh, Cheng-Yu and Huang, Chun-Wei and Zinkle, Steven John},
abstractNote = {Helium bubble formation was examined by scanning/transmission electron microscopy (S/TEM) in Fe-9/10Cr binary alloys and two dispersion strengthened nanostructured alloys (CNA3 and 14YWT containing 5–10 nm diameter carbide and oxide particles, respectively) after ex-situ and in-situ He implantation to ~10,000 appm at 500 to 900 °C. The combination of high-resolution STEM images and electron energy loss spectroscopy (EELS) revealed that the Y-Ti-O nanoparticles in 14YWT were uniformly distributed and exhibited a one-to-one relationship for bubble attachment to the nanoclusters. In the in-situ experiment at 900 °C, grain boundary cracking was severe in the Fe-10Cr model alloy, but not in the nanostructured alloys. From 500 to 900 °C, the bubble size generally increased with increasing irradiation temperature, while the bubble density decreased with increasing temperature. At the same temperatures, the bubble size in the implanted materials was in the order of Fe-9/10Cr > CNA3 > 14YWT, while the bubble density showed the opposite order. The observed bubble number densities for the nanostructured alloys are comparable to the nanoparticle density, suggesting that the nanoparticles in both alloys were effective in trapping He. Overall, our results indicate that very high He concentrations can be managed in nanostructured alloys by sequestering the helium into smaller bubbles (which leads to a lower volume swelling value) and to shield He from the grain boundaries. This can be attributed to the much higher sink strength associated with the nanoclusters or the He trapping ability between different types of nanoclusters.},
doi = {10.1016/j.actamat.2021.117165},
journal = {Acta Materialia},
number = ,
volume = 217,
place = {United States},
year = {Thu Jul 15 00:00:00 EDT 2021},
month = {Thu Jul 15 00:00:00 EDT 2021}
}
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