About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Defects and Interfaces: Modeling and Experiments
|
Presentation Title |
Influence of Thick 3-dimensional Interfaces on Deformation of Metallic Nanolayered Composites |
Author(s) |
Nathan A. Mara, Mauricio De Leo, Nicolas Fuchs-Lynch, Justin Y. Cheng, Shuozhi Xu, Jonathan Poplawsky, Jon Kevin Baldwin, Irene Beyerlein |
On-Site Speaker (Planned) |
Nathan A. Mara |
Abstract Scope |
Dr. Hoagland made invaluable contributions to understanding material properties in nanolayered composites that exhibit enhanced behaviors such as strength, radiation damage tolerance, and deformability. Together with numerous collaborators we found that 2-D interfaces with a sharp transition between phases have limitations with respect to deformability and toughness. 3-D interfaces are defined as heterophase interfaces that extend out-of-plane into the two crystals on either side and are chemically, crystallographically, and/or topologically divergent, in three dimensions, from both crystals they join. We focus on mechanical behavior of nanolayered Cu/Nb, Ti/Nb, and Mg/Nb containing interfaces with 3-D character. The resulting compositional gradient gives rise to new interphase boundary structures analyzed and quantified via S/TEM and Atom Probe Tomography. Micropillar compression results show strength of nanocomposites containing 3-D interfaces to be significantly greater than their 2-D counterparts. We describe structural evolution mechanistically through the use of atomistic and Phase Field Dislocation Dynamics simulations. |
Proceedings Inclusion? |
Planned: |
Keywords |
Composites, Nanotechnology, Mechanical Properties |