| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Real Time Imaging
|
| Presentation Title |
Understanding Deformation at the Nanoscale via In Situ SEM Mechanical Testing |
| Author(s) |
Nathan A. Mara |
| On-Site Speaker (Planned) |
Nathan A. Mara |
| Abstract Scope |
Since the micropillar compression technique was introduced in 2004, it has expanded from compression of single crystal metals to today’s suite of in-situ SEM mechanical testing that spans tension, compression, bending, and shear. In this presentation, I will present recent work and insights into mechanical behaviors utilizing in-situ straining in the SEM for a wide range of materials. Micropillar compression testing over seven orders of magnitude strain rate on single-crystal tungsten reveals strain rate sensitivity and activation volumes that are indicative of the dominant deformation mechanism. Micropillar compression and frustum indentation of W-based nanoporous materials and composites is coupled with Digital Image Correlation techniques to understand the effects of localized deformation on composite response. And in layered nanocomposites, imaging of shear localization during deformation provides a new understanding of the influence of atomic-level interface structure on mechanical behavior, and for design of materials with enhanced strength and toughness. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Nanotechnology, Thin Films and Interfaces |