About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Local Ordering in Materials and Its Impacts on Mechanical Behaviors, Radiation Damage, and Corrosion
|
| Presentation Title |
Comparing Short-range Ordering Behavior in Novel Austenitic Steels via Fluctuation Electron Microscopy Techniques |
| Author(s) |
Po-Cheng Kung, Jian-Min Zuo, Toshihiro Tsuchiyama, Brian Somerday, Petros Sofronis, Jessica A. Krogstad |
| On-Site Speaker (Planned) |
Jessica A. Krogstad |
| Abstract Scope |
Detecting and identifying heterogeneous SRO domains via highly localized Scanning Electron Nano-Beam Diffraction (SEND), or 4D-STEM, is more readily facilitated by the addition of the Fluctuation Electron Microscopy (FEM) method. Because the heterogeneous SRO domains are embedded in a homogeneous matrix, the calculated normalized variance of weak diffraction intensity in the series of diffraction patterns can be used to differentiate signals arising from small domains from those that stem from the matrix. In the current study we will compare the short range ordering behavior in one commercial, and four novel austenitic stainless steel compositions. While the averaged diffraction patterns are nearly identical for all alloys, the variance maps reveal the changes in heterogeneous SRO diffraction from alloy to alloy, which are further exacerbated in the presence of hydrogen. These differences hint at how SRO structure and morphology are modified by minor adjustments to alloy composition and thermal/environmental history. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Iron and Steel, Environmental Effects |