|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||High Entropy Alloys VIII
||Interpreting APT Data Containing He-bubbles in Irradiated Single-phase Concentrated Solid-solution Alloys (SP-CSAs)
||Jonathan Poplawsky, Xing Wang, Constantinos Hatzouglou, Ke Jin, Hongbin Bei, Yongqiang Wang, William Weber, Yanwen Zhang, Francois Vurpillot, Karren More
|On-Site Speaker (Planned)
He-bubbles form in irradiated alloys leading to swelling and embrittlement. Single-phase Concentrated Solid-solution Alloys (SP-CSAs) have shown good promise for superior radiation resistance. Quantifying He-bubble shell radiation induced segregation (RIS) is important for understanding He-bubble formation mechanisms. Atom probe tomography (APT) excels at quantifying nano-scale segregation but suffers when the APT tip deviates from a hemi-spherical surface during the experiment, such as a void exposure. APT data for several He bubble-containing SP-CSAs has been evaluated and compared to simulated APT experiments and STEM measurements. The tip shape progression has been identified, which gives insight into the best method for quantifying and comparing RIS between samples, and therefore, He-bubble RIS has been evaluated for several SP-CSAs. The results suggest that fast vacancy migration via Cr lattice sites could accelerate the He-bubble growth rate. Research was funded by the EDDE EFRC, CNMS, CINT, and U.S. DOE Office of Science.
||Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume