|About this Abstract
|2022 TMS Annual Meeting & Exhibition
|Late News Poster Session
|N-39: Assessing Void Swelling Resistance of Internal Reactor Materials with an Ultrarapid Photoacoustic Technique
|Nouf Almousa, Benjamin Dacus, Kevin Woller, Ji Ho Shin, Changheui Jang, Michael Short
|On-Site Speaker (Planned)
A non-contact photoacoustic technique in the form of transient grating spectroscopy (TGS) is applied to assess relative void swelling resistance of multiple structural materials. Statistically significant changes in the frequency of probed surface acoustic waves (SAWs) suggest that newly developed alloys containing uniformly distributed nanosized NbC precipitates show higher resistance to irradiation-induced void swelling when compared to their simpler, commercial analogues. The higher reduction in SAW frequency seen in the simpler steels, proportional to porosity, indicates more void formation which is shown by TEM imaging. This finding illustrates the minimum set of targeted TGS studies required to rapidly rank materials by relative void swelling resistance, and hence, accelerate irradiation defects studies.
|Nuclear Materials, Iron and Steel, Other