|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Mechanical Behavior of Nanostructured Materials
||Mechanical Properties and Microstructure Stability in Fe-Cr base Alloys for Nuclear Energy Applications
||Ronald Scattergood, Carl Koch
|On-Site Speaker (Planned)
Fe-14Cr base bcc alloys are used in structural applications that include nuclear reactor components. Nanostructured alloys that can contribute to the improved strengthening and related mechanical properties at elevated temperatures, as well as mitigating the formation of He bubble void swelling, are paramount to these applications. The strengthening mechanisms can be due to nanocrystalline grain size (Hall Petch) or nanoscale oxide particles (Orowan). Grain size stabilization can be due to thermodynamic stabilization or Zener pinning. Void swelling can be reduced by He bubble trapping in grain boundaries or by particles. The results of investigations for Fe-14CrX alloys are discussed where X is a nanocrystalline stabilizing element chosen based on thermodynamic stabilization model predictions. Zr, Hf, and Sc were used individually for thermodynamic stabilization, and Y-oxide was added for Zener pinning. Hardness data on the base and stabilized alloys was used to extract the contributions of Hall Petch vs. Orowan strengthening.
||Planned: Supplemental Proceedings volume