| About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Presentation Title |
Strengthening Effects across Ultrasonic Additive Manufacturing (UAM) Interfaces |
| Author(s) |
Michael B. Pagan, Steven Zinkle, Suresh Babu, Takahito Ohmura |
| On-Site Speaker (Planned) |
Michael B. Pagan |
| Abstract Scope |
Ultrasonic additive manufacturing (UAM) technology provides the mechanism for creating advanced structural metals with embedded optical fiber sensors for in-situ strain monitoring in demanding environments such as nuclear reactors. The method for creating these complex structures involves bonding dissimilar metals using high strain rate deformation, although the mechanisms involved have yet to be explored before this study. The refined microstructure and strengthening mechanism across these embedded sensor interfaces are explored using nanoindentation and TEM techniques. Various plastic deformation mechanisms are explored at these interfaces. Refined grain structures, vacancy clusters, and elevated dislocation densities are found to be contributing factors to the observed strengthening across the interface, and a hardness superposition principle is used to describe the combination of these effects. A sensitivity analysis provides insight on their relative potential contributions. This study provides valuable insight into defect mechanisms across micron-scale embedded sensor interfaces which is vital to their technical implementation. |
| Proceedings Inclusion? |
Undecided |