About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
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Accelerated Discovery and Qualification of Nuclear Materials for Energy Applications
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Presentation Title |
Sink Strength Effect on Bubble Formation in Helium-implanted Nanostructured Ferritic Alloys |
Author(s) |
Yan-Ru Lin, Zhanfeng Yan, David Hoelzer, Lizhen Tan, Steven Zinkle |
On-Site Speaker (Planned) |
Yan-Ru Lin |
Abstract Scope |
Helium in irradiated materials can cause unwanted material degradations. These effects may be mitigated by increasing the number of He trapping sites to control the bubble size or to shield He from the grain boundaries. In this study, 275keV He ions were implanted into 14YWT, 9YWT, CNA3, and CNA1 ferritic/martensitic nanostructured alloys at 500°C and 700°C. The bubble size increased and the density decreased with increasing temperature for all alloys. However, the variation was much more moderate for the 9YWTV and 14YWT alloy that had higher nanocluster density. The two CNA alloys exhibited good He trapping at 500°C but relatively inefficient trapping at 700°C. The 14YWT alloy appears to sequester the helium into smaller bubbles more effectively than other alloys. This may be attributed to the high sink strength associated with the high nanocluster density, or the difference of the He trapping ability (at different temperatures) for different nanoclusters. |
Proceedings Inclusion? |
Planned: |