|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Mechanical Behavior and Degradation of Advanced Nuclear Fuel and Structural Materials
||NOW ON-DEMAND ONLY - Deformation Behavior of Helium Irradiated Nano-pillars Containing a Helium Gas Bubble Superlattice
||Andrew J. Scott, Yujun Xie, Peter Hosemann
|On-Site Speaker (Planned)
||Andrew J. Scott
The Helium Gas Bubble Superlattice (He-GBS), one example of defect self-ordering phenomenon encountered in structural materials in fission and proposed fusion systems, is a subject of ongoing interest in the nuclear materials community. While many studies have investigated the structure and formation of such systems, the resultant He-GBS induced changes of mechanical properties and deformation behavior of materials remain uncertain.
In this study, nano pillars are milled from high purity single crystal Vanadium and Titanium using a focused ion beam (FIB) and irradiated using a Helium Ion Microscope (HIM). Mechanical properties are measured using in situ SEM compression testing, allowing for quantification and visualization of hardening and embrittlement in irradiated structures. Additional characterization is performed utilizing Transmission Electron Microscopy (TEM) to observe changes in the He-GBS structures before and after compression. We believe our results establish a more comprehensive understanding of the interactions between defect and host lattices during deformation.
||Mechanical Properties, Nuclear Materials,