|About this Abstract
||MS&T21: Materials Science & Technology
||Advanced Characterization of Materials for Nuclear, Radiation, and Extreme Environments
||Effects of He on Nanoscale Mechanical Properties of Er
||Eric Lang, Caitlin Taylor, Riley Parrish, Patrick Price, Raj Tandon, Khalid Hattar
|On-Site Speaker (Planned)
In nuclear energy systems, materials exposed to helium will form bubbles and cavities within the microstructure. Combined with high temperatures and irradiation conditions, degradation of mechanical properties can occur, affecting material safety and bulk performance. In this work, we investigate the influence of helium implantation on the mechanical property performance of erbium and erbium hydride, which exhibits bubble formation and blistering following helium accumulation. Utilizing in-situ transmission electron microscopy and scanning electron microscopy mechanical testing on helium-implanted erbium hydride, we investigate the mechanical performance under various nano/micro-scale straining conditions, including tension, compression, and bending. With real-time imaging and stress-strain measurements, the microstructural features are correlated with deformation behavior to quantify the effects of helium loading to be able to correlate nanoscale helium bubbles with the micro-to-nano scale mechanical performance. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525.