| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Real Time Imaging
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| Presentation Title |
In-situ Imaging of Nanocomposite Deformation: The influence of 3-D Interfacial Structure and Morphology on Mechanical Response |
| Author(s) |
Nathan A. Mara, Youxing Chen, Justin Y. Cheng, Kevin Schmalbach, Zhao Wang, Nan Li, Jon Kevin Baldwin, R. Lee Penn, David Poerschke, Andreas Stein, William Gerberich, Irene Beyerlein |
| On-Site Speaker (Planned) |
Nathan A. Mara |
| Abstract Scope |
Nanocomposites exhibit enhanced strength, radiation damage tolerance, and deformability when compared with their coarser-grained counterparts. Here, a combination of in-situ SEM straining and post-deformation TEM reveals the mechanical behavior of two different classes of nanocomposites: 1.) nanolayered Cu/Nb containing interfaces with 3D (perpendicular to interface plane) chemical gradients and 2.) Tungsten-based 3D ordered nano/mesoporous composites consisting of a porous W scaffolding with silicon carbide infill. In-situ micropillar compression shows that the strength of Cu/Nb nanocomposites containing 3D interfaces is greater than those containing 2D interfaces. In the case of 3D mesoporous W-SiC, in-situ SEM indentation and micropillar compression coupled with digital image correlation reveal the distribution of local strains in the W ligaments. We will present our recent results on deformation of 3-D interfaces and nanostructures, describing the observed behavior mechanistically through the use of multiscale simulations. |
| Proceedings Inclusion? |
Planned: |