About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Mechanical Behavior at the Nanoscale VI
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Presentation Title |
In Situ Nanoscale Mechanical Testing to Isolate the Effect of Grain Boundary and Linear Complexions |
Author(s) |
Timothy J. Rupert |
On-Site Speaker (Planned) |
Timothy J. Rupert |
Abstract Scope |
Complexions, local equilibrium states associated with defects such as grain boundaries and dislocations, can enable unique pathways for the control of mechanical behavior. In this talk, we explore the use of in situ nanomechanical testing inside of electron microscopes to understand how these features affect macroscale response such as plasticity, failure, and strain hardening, as well as nanoscale defect physics. Deformation of nanocrystalline Cu and Al alloys demonstrates that amorphous grain boundary complexions can be toughening features and that hierarchical nanostructures comprised of different complexions can be used to tailor plasticity. In these cases, dislocation plasticity is modified by tuning the boundaries with which these defects eventually interact. Uniaxial experiments in transmission imaging modes show that individual dislocation motion can be directly modified with linear complexions, providing an even more direct pathway for microstructure design. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Nanotechnology, |